ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTS
Selecting the Test Mode Display op rec tm Details of History Cumulative recording time is displayed. When cumulative recording time is over 1 minute, the hour and minute are displayed as they are. When it is under 1 minute, Under 1 min is displayed. The displayed time shows how long the laser is in high power state. It is about one fourth the actual recording time. Cumulative playing time is displayed. When cumulative playing time is over 1 minute, the hour and minute are displayed as they are. When it is under 1 minute, Under 1 min is displayed. Cumulative spindle motor running time is displayed. When cumulative spindle motor run time is over 1 minute, the hour and minute are displayed as they are. When it is under 1 minute, Under 1 min is displayed. Displays the total number of retries during recording and number of retry errors during play. Displayed as rss pss. r indicates the retries during recording while p indicates the retry errors during play. The number of retries and retry errors are displayed in hexadecimal digits from 00 to FF. Displays the total number of errors. Displayed as total ss. The number of errors is displayed in hexadecimal digits from 00 to FF. Displays the 10 latest errors. Displayed as 0s ErrCd@@. s indicates the history number. The smaller the number, the more recent is the error. (00 is the latest). @@ indicates the error code. Refer to the following table for the details. The error history can be switched by turning the [ l AMS L ] (MD) knob. Display the past five retry addresses. Displays ss ADRS ssss, ss is the history number. ssss is the cluster with the retry error. Select the error history number using the [ l AMS L ] knob. er refresh Mode to clear the error history and retry address history. [Operating method] 1) Press [ l AMS L ] (MD) knob when er refresh is displayed. 2) The display will change to er refresh?, and then press [YES] button. The operation is over if Complete! is displayed. After this mode was executed, check the following: The data have been cleared. Perform the recording and playing to check that the mechanism operates normally. Mode to clear cumulative time of op rec tm and op play tm. These historical data are used to determine the timing when the optical pick-up is to be replaced. When the optical pick-up was replaced, perform this operation to clear historical data. [Operating method] 1) Press [ l AMS L ] (MD) knob when op change is displayed. 2) The display will change to op change?, and then press [YES] button. The operation is over if Complete! is displayed. Mode to clear cumulative time of spdl rp tm. This historical data is used to determine the timing when the spindle motor is to be replaced. When the spindle motor was replaced, perform this operation to clear historical data. [Operating method] 1) Press [ l AMS L ] (MD) knob when spdl change is displayed. 2) The display will change to spdl change?, and then press [YES] button. The operation is over if Complete! is displayed.

IOP TE I+3V GND FE VC RF

1 I+3V IOP GND TE FE VC RF 7 I+3V IOP GND TE FE VC RF

for MDM-7X2A

IOP DATA RECORDING AND DISPLAY WHEN OPTICAL PICK-UP AND NON-VOLATILE MEMORY (IC195 OF BD (MD) BOARD) ARE REPLACED
The IOP value labeled on the optical pick-up can be recorded in the non-volatile memory. By recording the value, it will eliminate the need to look at the value on the optical pick-up label. When replacing the optical pick-up or non-volatile memory (IC195 of BD (MD) board), record the IOP value on the optical pick-up according to the following procedure. Record Procedure: 1. Press the x (CD), x (MD) and [YES] buttons at the same time. 2. Press the [l AMS L ] (MD) knob and x (MD) button to display <0> To Normal. 3. Turn the [ l AMS L ] (MD) knob and when <5> MD Test is displayed, press the [ l AMS L ] (MD) knob. 4. Turn the [ l AMS L ] (MD) knob to display [Service], and press the [YES] button. 5. Turn the [ l AMS L ] (MD) knob to display Iop Write (C05), and press the [YES] button. 6. The display becomes Ref=@@@.@ (@ is an arbitrary number) and the numbers which can be changed will blink. 7. Input the IOP value written on the optical pick-up label. To select the number : Turn the [ l AMS L ] (MD) knob. To select the digit : Press the [ l AMS L ] (MD) knob. 8. When the [YES] button is pressed, the display becomes Measu=@@@.@ (@ is an arbitrary number). 9. As the adjustment results are recorded for the 6 value. Leave it as it is and press the [YES] button. 10. Complete! will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become Iop Write (C05). 11. Press the I/1 button to display <5> MD Test. 12. To turn the power OFF, turn the [ l AMS L ] (MD) knob and <8> Initial displayed, press the [ l AMS L ] (MD) knob. Display Procedure: 1. Press the x (CD), x (MD) and [YES] buttons at the same time. 2. Press the [ l AMS L ] (MD) knob and x (MD) button to display <0> To Normal. 3. Turn the [ l AMS L ] (MD) knob and when <5> MD Test is displayed, press the [ l AMS L ] (MD) knob. 4. Turn the [ l AMS L ] (MD) knob to display [Service], and press the [YES] button. 5. Turn the [ l AMS L ] (MD) knob to display Iop Read (C26). 6. @@.@/##.# is displayed and the recorded contents are displayed. @@.@ : indicates the IOP value on the optical pick-up label. ##.# : indicates the IOP value after adjustment 7. To end, press the [ l AMSL ] (MD) knob or [MENU/NO] button to display Iop Read (C26). 8. Press the I/1 button to display <5> MD Test. 9. To turn the power OFF, turn the [ l AMS L ] (MD) knob and <8> Initial displayed, press the [ l AMS L ] (MD) knob.

CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS IN MD
Before performing repairs, perform the following checks to determine the faulty locations up to a certain extent. Details of the procedures are described in 6 Electrical Adjustments. Criteria for Determination (Unsatisfactory if specified value is not satisfied) Laser power check (6-2 : See page 38) 0.9 mW power Specified value : 0.80 to 0.96 mW 8.4 mW power Specified value : 8.2 to 8.6 mW Iop (at 8.4mW) Labeled on the optical pick-up Iop value 10mA Traverse check (6-6 : See page 39) Focus bias check (6-7 : See page 40) Traverse waveform Specified value : Below 10% offset Error rate check Specified value : For points a and b C1 error : About 200 AD error : below 2 For point C C1 error: 50 AD error: below 2 Error rate check Specified value: a. When using test disc (MDW-74/GA-1) C1 error : Below 80 AD error : Below 2 b. When using check disc (TDYS-1) C1 error : Below 50 CPLAY error rate check Specified value: C1 error : Below 80 AD error : Below 2 Measure if unsatisfactory: Clean the optical pick-up Adjust again Replace the optical pick-up Replace the optical pick-up
Replace the optical pick-up Replace the optical pick-up
C PLAY check (6-8 : See page 40)
Replace the optical pick-up
Self-recording/playback check (6-9 : See page 40)
If always unsatisfactory: Replace the overwrite head Check for disconnection of the circuits around the overwrite head If occasionally unsatisfactory: Check if the overwrite head is distorted Check the mechanism around the sled
Temperature compensation offset check (6-1 : See page 38)
Unsatisfactory if displayed as T=@@ (##) [NG NG (@@, ## are both arbitrary numbers)
Check for disconnection of the circuits around D101 (BD (MD) board) Check the signals around IC101, IC151, CN102, CN103 (BD (MD) board)
Note: The criteria for determination above is intended merely to determine if satisfactory or not, and does not serve as the specified value for adjustments. When performing adjustments, use the specified values for adjustments.

SERVICE MODE

This set provides various modes for the service. Enter the service mode through the procedure given below, and select the desired mode. Procedure: 1. Press the x (CD), x (MD) and [YES] buttons at the same time. 2. Press the [ l AMS L ] (MD) knob and x (MD) button to display <0> To Normal. 3. At this time, turn the [ l AMS L ] (MD) knob can select all modes. For the contents of mode, see the following table. 4. To exit from the service mode, turn [ l AMS L ] (MD) to display <0> To Normal, then press the [l AMS L] (MD) knob. Contents of test mode No. 26 Display <0> To Normal <1> Version <2> FLD <3> Key, Jog <4> CD Test 0> COMMAND 1> ERROR 2> SPEED X1 3> ISRC 4> CHECK8 5> AUTO G 6> HENSHIN 7> PORT 8> AMS ON 9> TRK ON <5> MD Test <6> Retry & TOC <7> PC LINK <8> Initial <9> MD Update <10> Sircs <11> Dump <12> CD Aging <13> Rep 5 off <14> KeyBoard <15> Special <16> CD Ship Function Exit from test mode Microcomputer Version display FL display test/LED display test Key/Jog input test CD all sorts test Command transfer menu C1, C2 error display Disc speed selection ISRC display Check 8 cm display Auto gain display Decentiering display Port selection AMS display TRK ON/OFF display MD all sorts test MD TOC off & Retry test PC connection check All reset Software update Sircs code display Microcomputer Dump mode CD Aging Cancel restriction of repeat five times Keyboard check Command, Sircs test Shipment mode

4 DIGITAL OPTICAL IN jack 5 KEYBOARD jack

SECTION 3 DISASSEMBLY

This set can be disassembled in the order shown below.

CASE (Page 18)

FRONT PANEL ASSY (Page 18)
HP BOARD, SW BOARD, LED BOARD, DISPLAY BOARD (Page 19)
CD MECHANISM DECK SECTION (CDM53G-21BD53), MD MECHANISM DECK SECTION (MDM-7X2A) (Page 19)

AUDIO BOARD (Page 20)

BD (MD) BOARD (Page 21)
CD BASE UNIT (BU-21BD53) (Page 23)
MAIN BOARD, POWER TRANSFORMER (TR701) (Page 20)

HOLDER ASSY (Page 21)

FITTING BASE (GUIDE) ASSY, BRACKET (CHASSIS) AND MAGNET ASSY (Page 24)
GUIDE (L), SLIDER (EJ), SLIDER, LEVER (HEAD) (Page 22)

TRAY (SUB) (Page 24)

OPTICAL PICK-UP (KMS-262A/J1N), OVER LIGHT HEAD (HR901) (Page 22)
CHASSIS (MOLD B) SECTION, STOCKER SECTION AND SLIDER (SELECTION) (Page 25)
SPINDLE MOTOR ASSY (M101), SLED MOTOR ASSY (M102), LOADING MOTOR ASSY (M103) (Page 23)
Note: Follow the disassembly procedure in the numerical order given.
2 case 1 two screws 1 two screws

1 two screws

FRONT PANEL ASSY

1 connector (CN300)

2 wire (flat type) (9 core) (CN803)
5 claw 4 four screws (BVTT3 6)
5 claw 3 seven screws (BVTT3 6)
2 wire (flat type) (19 core) (CN802)

6 front panel assy

HP BOARD, SW BOARD, LED BOARD, DISPLAY BOARD
2 screw (BVTP2.6 8) 4 HP board 5 nine screws (BVTP2.6 8)
6 LED board 3two nuts 2 two screws (BVTP2.6 8) 7 four screws (BVTP2.6 8)

9 ten screws (BVTP2.6 8)

8 SW board 9 four screws (BVTP2.6 8)

1 knob (phone) level

0 DISPLAY board 1 two knob (AMS) assys
CD MECHANISM DECK SECTION (CDM53G-21BD53), MD MECHANISM DECK SECTION (MDM-7X2A)
3 two screws (BVTT3 6) 3 two screws (BVTT3 6) 4 CD mechanism deck section (CDM53G-21BD53) 2 wire (flat type) (21 core) (CN101)
6 four screws (BVTTWH M3)
1 connector (CN713) 7 MD mechanism deck section (MDM-7X2A)
2 wire (flat type) (17 core) (CN701)
5 wire (flat type) (17 core) (CN303)
5 wire (flat type) (27 core) (CN304)

AUDIO BOARD

1 wire (flat type) (19 core) (CN305)

2 three screws (BV3 8)

3 AUDIO board
MAIN BOARD, POWER TRANSFORMER (TR701)
2 screw (BVTT3 6) 6 two PC board holders 1 four screws (PTTWH3 6)

power transformer

2 screw (BVTT3 6)
power transformer (TR701)

MAIN board bottom view

2 five screws (BVTT3 6)
4 Remove solders. 5 MAIN board

BD (MD) BOARD

3. Ending the continuous recording mode (1) Press the [MENU/NO] button. The display changes to CREC 2MODE (C37) and REC goes off. (2) Press the [A EJECT] button and take out the disc.
Note 1: The recording start addresses for IN, MID, and OUT are as follows.
IN 40h cluster MID 300h cluster OUT 700h cluster Note 2: The [MENU/NO] button can be used to stop recording anytime.
Note 3: Do not perform continuous recording for long periods of time above 5 minutes. Note 4: During continuous recording, be careful not to apply vibration.
6. FUNCTIONS OF OTHER BUTTONS
Function H (MD) x (MD) M (MD) m (MD) REC MODE PLAY MODE (MD) DISPLAY A EJECT I/1 Contents Sets continuous playback when pressed in the STOP state. When pressed during continuous playback, the tracking servo turns ON/OFF. Stops continuous playback and continuous recording. The sled moves to the outer circumference only when this is pressed. The sled moves to the inner circumference only when this is pressed. Switches between the pit and groove modes when pressed. Switches the spindle servo mode (CLVS y CLVA). Switches the displayed contents each time the button is pressed Ejects the disc Releases the test mode
7. TEST MODE DISPLAYS Each time the [DISPLAY] button is pressed, the display changes in the following order.
When CPLAY and CREC are started, the display will forcibly be switched to the error rate display as the initial mode. 1. Mode display Displays TEMP ADJUST (C03), CPLAY2MODE (C36), etc. 2. Error rate display Displays the error rate in the following way. C= AD = C = : Indicates the C1 error. AD = : Indicates ADER. 3. Address display The address is displayed as follows. (MO: recordable disc, CD: playback only disc) h= s= (MO pit and CD) h= a= (MO groove) h = Indicates the header address. s = Indicates the SUBQ address. a = Indicates the ADIP address.
Note: is displayed when servo is not imposed.
Mode display Error rate display Address display Auto gain display (Not used in servicing) Detrack check display (Not used in servicing) IVR display (Not used in servicing) C1 error and jitter display (Not used in servicing) AD error and jitter display (Not used in servicing)
MEANINGS OF OTHER DISPLAYS

Set the CD test mode when performing confirmations. After completing confirmation, release the CD test mode. (Turn the [l AMS L ] (MD) knob, <8> Initial displayed and press the [ l AMS L ] (MD) knob so that the power is turned off.)

1. COMMAND TRANSFER MENU

Procedure: (1) Enter the test mode, then rotate [ l AMS L] (MD) knob to display 0> COMMAND, and press the [l AMS L] (MD) knob. (2) Select a command with [ l AMS L ] (MD) knob, and press the [ l AMS L ] (MD) knob to set. (3) Select the edit position with m (MD) and M (MD) buttons, and rotate [l AMS L] (MD) knob for editing, then press the [l AMS L ] (MD) knob for transfer. (4) To exit from this mode, press the [MENU/NO] button.

2. C1, C2 ERROR DISPLAY

Procedure: (1) Enter the test mode, then rotate [l AMS L] (MD) knob to display 1> ERROR, and press the [l AMS L] (MD) knob. (2) C1 error and C2 error are displayed on the left side and right side with 4-digit codes respectively. (3) To exit from this mode, press the [MENU/NO] button.

3. DISC SPEED SELECTION

Procedure: (1) Enter the test mode, then rotate [ l AMS L ] (MD) knob to display 2> SPEED X1, and press the [ l AMS L ] (MD) knob. (2) Each time the [ l AMS L ] (MD) knob is pressed, the speed changes over such as x1 t x2 t x4 t x1. (3) To exit from this mode, press the [MENU/NO] button.

4. CHECK 8 DISPLAY

Procedure: (1) Enter the test mode, then rotate [l AMS L ] (MD) knob to display 4> CHECK8, and press the [l AMS L ] (MD) knob. (2) The time from spindle kick to GFS detect is displayed. (3) To exit from this mode, press the [MENU/NO] button.

5. PORT SELECTION

Procedure: (1) Enter the test mode, then rotate [ l AMS L] (MD) knob to display 7> PORT, and press the [l AMS L ] (MD) knob. (2) Rotate the [l AMS L ] (MD) knob to select GFS, ERROR RATE, RFCK and press the [ l AMS L ] (MD) knob to set. (3) To exit from this mode, press the [MENU/NO] button.

6. AMS ON/OFF

Procedure: (1) Enter the test mode, then rotate [ l AMS L ] (MD) knob to display 8> AMS ON, and press the [ l AMS L ] (MD) knob. (2) Switch the high speed ON/OFF of the track jamp. (3) To exit from this mode, press the [MENU/NO] button.

7. TRK ON/OFF

Procedure: (1) Enter the test mode, then rotate [ l AMS L ] (MD) knob to display 9> TRK ON, and press the [ l AMS L ] (MD) knob. (2) Switch the tracking servo ON/OFF. (3) To exit from this mode, press the [MENU/NO] button.
SECTION 6 ELECTRICAL ADJUSTMENTS

1. PARTS REPLACEMENT AND ADJUSTMENT
If malfunctions caused by optical pick-up such as sound skipping are suspected, follow the following check.

Check before replacement

6-2. Laser Power Check (See page 38) OK
6-3. Iop Compare (See page 38) OK
6-4. Auto Check (See page 39) OK
Replace optical pick-up or MDM-7X2A
Other faults are suspected. Check the threading mechanism parts (sled motor, etc.)

Adjustment flow

Abbreviation OP: optical pick-up

Replace IC195 NO

After turning off and then on the power, initialize the EEPROM For details, refer to 10. WHEN MEMORY NG IS DISPLAYED (See page 33)

Replace OP or IC195 NO

7. INITIAL SETTING OF ADJUSTMENT VALUE (See page 41)
Replace IC101, IC195, or D101 NO
9. TEMPERATURE COMPENSATION OFFSET ADJUSTMENT (See page 41)
Replace OP, IC190, or IC195 NO
10. LASER POWER ADJUSTMENT (See page 41)
Replace OP, IC102, IC190, or IC195 NO
11. Iop NV SAVE (See page 42)
Replace OP, IC101, IC151, or IC195 NO
12. TRAVERSE ADJUSTMENT (See page 42) 13. FOCUS BIAS ADJUSTMENT (See page 43) 16. AUTO GAIN CONTROL OUTPUT LEVEL ADJUSTMENT (See page 44)

Replace OP NO

OP change in Err Display mode Iop write
Replace the spindle motor NO 6-4. Auto Check (See page 39)
Spindle change in Err Display mode

End adjustments

2. PRECAUTIONS FOR CHECKING LASER DIODE EMISSION
To check the emission of the laser diode during adjustments, never view directly from the top as this may lose your eye-sight.
3. PRECAUTIONS FOR USE OF OPTICAL PICKUP (KMS-262A)
As the laser diode in the optical pick-up is easily damaged by static electricity, solder the laser tap of the flexible board when using it. Before disconnecting the connector, desolder first. Before connecting the connector, be careful not to remove the solder. Also take adequate measures to prevent damage by static electricity. Handle the flexible board with care as it breaks easily.

pick-up flexible board

laser tap
Optical pick-up flexible board
4. PRECAUTIONS FOR ADJUSTMENTS
1. When replacing the following parts, perform the adjustments and checks with in the order shown in the following table. 2. Set the test mode when performing adjustments. After completing the adjustments, exit the test mode. Perform the adjustments and checks in Group Service of the test mode. 3. Perform the adjustments to be needed in the order shown. 4. Use the following tools and measuring devices. Check Disc (MD) TDYS-1 (Parts No. 4-963-646-01) Test Disc (MDW-74/GA-1) (Parts No. 4-229-747-01) Laser power meter LPM-8001 (Parts No. J-2501-046-A) or MD Laser power meter 8010S (Parts No. J-2501-145-A)*1 Oscilloscope (Measure after performing CAL of prove.) Digital voltmeter Thermometer Jig for checking BD (MD) board waveform (Parts No. : J-2501-196-A) 5. When observing several signals on the oscilloscope, etc., make sure that VC and ground do not connect inside the oscilloscope. (VC and ground will become short-circuited.) 6. Using the above jig enables the waveform to be checked without the need to solder. (Refer to Servicing Notes on page 7.) 7. As the disc used will affect the adjustment results, make sure that no dusts nor fingerprints are attached to it. *1 Laser power meter When performing laser power checks and adjustment (electrical adjustment), use of the new MD laser power meter 8010S (Part No. J-2501-145-A) instead of the conventional laser power meter is convenient. It sharply reduces the time and trouble to set the laser power meter sensor onto the objective lens of optical pick-up.

Adjusting Procedure: 1. Turn the [ l AMS L ] (MD) knob to display TEMP ADJUST (C03). 2. Press the [YES] button to select the TEMP ADJUST (C03) mode. 3. TEMP = [OK and the current temperature data will be displayed. 4. To save the data, press the [YES] button. When not saving the data, press the [MENU/NO] button. 5. When the [YES] button is pressed, TEMP = SAVE will be displayed and turned back to TEMP ADJUST (C03) display then. When the [MENU/NO] button is pressed, TEMP ADJUST (C03) will be displayed immediately. Specified Value: The TEMP = should be within E0 - EF, F0 - FF, 00 0F, 10 - 1F and 20 - 2F.
10. LASER POWER ADJUSTMENT
Check the IOP value of the optical pick-up before adjustments. (Refer to 8. Recording and Displaying the Iop Information) Connection:
Adjusting Procedure: 1. Set the laser power meter on the objective lens of the optical pick-up. (When it cannot be set properly, press the m (MD) button or M (MD) button to move the optical pick-up) Connect the digital voltmeter to CN105 pin 1 (I+3V) and CN105pin 2 (IOP) on the BD (MD) board. 2. Turn the [ l AMS L ] (MD) knob to display LDPWR ADJUST (C04). (Laser power : For adjustment) 3. Press the [YES] button once to display LD 0.9 mW $. 4. Turn the [l AMS L ] (MD) knob so that the reading of the laser power meter becomes 0.85 to 0.91 mW. Press the [YES] button after setting the range knob of the laser power meter, and save the adjustment results. (LD SAVE $ will be displayed for a moment) 5. Then LD 7.0 mW $ will be displayed.
6. Turn the [ l AMS L ] (MD) knob so that the reading of the laser power meter becomes 6.9 to 7.1 mW, press the [YES] button to save it.
Note: Do not perform the emission with 7.0 mW more than 15 seconds continuously. 7. Then, turn the [ l AMS L ] (MD) knob to display
4. After Complete! is displayed momentarily, the display changes to Iop 7.0 mW. 5. After the display changes to Iop=yysave?, press the [YES] button. 6. When Complete! is displayed, it means that Iop NV saving has been completed.
LDPWR CHECK (C13). 8. Press the [YES] button once to display LD 0.9 mW $. Check that the reading of the laser power meter become 0.85 to 0.91 mW. 9. Press the [YES] button once more to display LD 7.0 mW $. Check that the reading the laser power meter and digital voltmeter satisfy the specified value. Note down the digital voltmeter reading value. Specified Value: Laser power meter reading : 7.0 0.2 mW Digital voltmeter reading : Value on the optical pick-up label 10%

Note: A clear RF signal waveform means that the shape can be clearly distinguished at the center of the waveform.

RF signal waveform

VOLT/DIV: 200 mV TIME/DIV: 500 ns (normal speed)

level: 1.2 0.2 Vp-p

S Curve Check Connection:
oscilloscope (DC range) BD (CD) board TP (FE) TP (VC)
Check Location: BD (CD) board E-F Balance Check Connection:
oscilloscope (DC range) BD (CD) board TP4 (TE) TP (VC)
Procedure: 1. Connect oscilloscope to test point TP (FE) and TP (VC) on BD (CD) board. 2. Turn ON the power. 3. Put disc (YEDS-18) in and turned Power switch on again and actuate the focus search. (actuate the focus search when disc table is moving in and out.) 4. Check the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak level within 3.6 0.5 Vp-p.

S-curve waveform

symmetry

within 3.6 0.5 Vp-p

Procedure: 1. Connect oscilloscpe to test point TP (TE) and TP (VC) on BD (CD) board. 2. Turn ON the power. 3. Put disc (YEDS-18) in to play the number five track. 4. Press the [l AMS L ] (MD) knob to display 9> TRK ON at the service mode. (The tracking servo and the sledding servo are turned OFF) 5. Check the level B of the oscilliscope's waveform and the A (DC voltage) of the center of the Traverse waveform. Confirm the following : A/B x 100 = less than 22%

Center of the waveform B

Note: Try to measure several times to make sure than the ratio of A : B or B : A is more than 10 : 7. Take sweep time as long as possible and light up the brightness to obtain best waveform.
A (DC voltage) level: 1.3 0.6 Vp-p
Check Location: BD (CD) board RF Level Check Connection:
oscilloscope (AC range) BD (CD) board TP (RF) TP (VC)
6. Press the [l AMS L ] (MD) knob. (The tracking servo and sledding servo are turned ON) Confirm the C (DC voltage) is almost equal to the A (DC voltage) is step 5.
Procedure: 1. Connect oscilloscope to test point TP (RF) and TP (VC) on BD (CD) board. 2. Turn ON the power. 3. Put disc (YEDS-18) in to play the number five track. 4. Confirm that oscilloscope waveform is clear and check RF signal level is correct or not.
0V Tracking servo Sled servo OFF Tracking servo Sled servo ON

C (DC voltage)

Check Location: BD (CD) board
Adjustment and Checking Location:
BD (CD) BOARD (Conductor Side)
Adjustment for Replace the Base Unit (BU-21BD53) When replacing the base unit (BU-21BD53), perform the adjustment with the following procedure. Connection:
digital voltmeter MAIN board

TP (VC) IC171 TP (FE)

TP (+5 V) TP (GND)

TP (TE) TP (RF)

Adjustment procedure: 1. Connect the digital voltmeter to TP (+5 V) and TP (GND) on the MAIN board. 2. Adjust the RV700 so that the reading of the digital voltmeter becomes 5.21 0.05 V. Specified Value: Digital voltmeter reading: 5.21 0.05 V Adjustment Location:

2, 3, 24, 25 DQ1 DQ4

AT AMP

49, 48, 50, 51

D-RAM IC152

OE WE RAS CAS
S101 SYSTEM CONTROLLER (MD MECHANISM CONTROLLER) IC801 (1/2) LIMIT-IN 30
S101 (LIMIT IN) ON: When the optical pick-up is inner position. S105 (REC POSITION) ON: When the over write head is recording position. S103 (PACK OUT) ON: When the eject slider is open position. S104 (PLAY POSITION) ON: When the eject slider is playback position.

PSB 16

47 DIG-RST

LDIN LDOUT

35 WRPWR 14 MOD SPFD SPRD

S105 REC-SW 43

RECP 83 APCREF AUTOMATIC POWER CONTROL 64
AUX1 ABCD FE TE SE PEAK BOTM

13 S103

M101 (SPINDLE)

6 OUT4F 8 OUT4R

IN4R 3 IN4F 4
5 IN1 LOADING MOTOR DRIVE IC400

6 IN2 VZ 4

+5V REFERENCE VOLTAGE SWITCH Q400, 401

OUT-SW 51

M102 (SLED)

27 OUT2F 25 OUT2R

IN2F 29 IN2R 30

SFDR 92 SRDR 91

PWM GENERATOR

ANALOG MUX

S104 PLAY-SW LD-LOW S102 REFLECT 67 SW PROTECT 68 SW SDA 66 SCL 60 EEP-WP 1

OUT1 OUT10

A/D CONVERTER DIGITAL SERVO SIGNAL PROCESS

2-AXIS DEVICE

(TRACKING) (FOCUS)

21 OUT1F 23 OUT1R

IN1F 19 IN1R 18

FFDR 88 FRDR 89

FROM CPU INTERFACE XLRF CKRF DTRF XLAT 80 SCLK 81 SWDT 82 HF MODULE SWITCH Q131 134
M103 (LOADING) EEPROM IC195 SDA SCL WP
S102-1 (REFLECT RATE DETECT) ON: When the high reflection rate disc detect.
2 S102-2 (PROTECT DETECT) ON: When the rec-proof claw is close. (un-protect)
FCS TRK+ TRK 12 OUT3F 10 OUT3R IN3F 14 IN3R 15 TFDR 86 TRDR 85 DIGITAL SERVO SIGNAL PROCESSOR IC151 (2/2)

AUTO SEQUENCER

HF MODULE

(Page 48)

BLOCK DIAGRAM MAIN Section
ADDT LRCK BCK RESET SWITCH QDATAO WS BCK PWON SCLK CLOCK CONTROL A/D CONVERTER IC301 DIGITAL INTERFACE DCCANCELLATION FILTER DECIMATION FILTER A/D CONVERTER BLOCK VINL 1 LINE AMP IC305
J300 L IN R ANALOG L OUT R

CLKOUT

CLOCK AND TIMING CIRCUIT
D/A CONVERTER IC300 J990 PHONES

INTERPOLATOR

NOISE SHAPER

CD/MD SELECTOR IC307

AUDIO FEATURE PROCESSOR
SPDIFO SPDIFI IEC 958 DECODER DATA IN/OUT INTERFACE D/A CONVERTER BLOCK
18 LINE AMP IC100 (1/2), IC200 (2/2) LOW-PASS FILTER IC100 (2/2), IC200 (2/2) HEADPHONE AMP IC2

IISOUTBCK

IISOUTWS

SLICER SEL

1 RESET
RV900 MUTING Q100, 200 PHONE LEVEL

LRCK, BCK

MUTING Q101, 201 MUTING Q300 MUTING CONTROL SWITCH Q303 D300
DATA CLK SUBQ SQCK XLT SENS SCOR LDON SPNDL MUTE XRST DOUT

CD BLOCK (BU-21BD53)

D303 PDOWN

45 100

(Page 50)
CD DATA CD CLK SQ DATA SQ CLK XLT SENS SCOR LDON SPNDL MUTE XRST

DAC MUTE LINE MUTE

SPDIF MUTE

SPDIF LOCK

S702 S702 (LID) (ON: When CD lid is close.) S701 (MID OUT) ON: When tray is going to open/close. S708 (OUT) (ON: When tray is open.) S704 (IN) ON: When sub tray set to play position. S703 (MID IN) ON: When sub tray move between tray and stocker. S705 (INIT) (ON: When elevator down to bottom.) S706 (COUNT) ON: When elevator up/down each sub tray stock position. 87 PRTC SW SMIDOUT SW SOUT SW S704 S703 SINIT SW SCOUNT SW

LEVEL L 94 LEVEL R 95

LEVEL L LEVEL R
SYSTEM CONTROLLER (MD MECHANISM CONTROLLER) IC801 (2/2)

LINE MUTE

DARESET

DAC MUTE

RESET 19

I2CDAT

I2CCLK

CS0 OE WE WP

37 IIC DATA IICCLK KEY DATA 78 MID IN SW KEY CLK 77 IN SW MUTING Q302

D0 D119, 113 102

A0 A94, 92, 85 77, 75, 90

RESET SWITCH Q701

DQ0 DQ15

KEY MUTE 22

FLASH ROM IC802

CE OE WE WP

29, 31, 33, 35, 38, 40, 42, 44, 30, 32, 34, 36, 39, 41, 43, 45
25 18, 8 1, 48, 17, 16 A0 A18

X801 10MHz

SIGNAL PATH : CD PLAY : MD PLAY (ANALOG OUT) : MD REC (ANALOG IN)

I2CCLK I2CDATA

XOUT 2 OUT1 MOTOR OUT2 DRIVE IN1 INLOAD NEG 73 LOAD POS XIN 15 MD RST 26 DISC IN DETECT SENSOR D704, Q703 X800 16MHz

Note on Schematic Diagram: All capacitors are in F unless otherwise noted. pF: F 50 WV or less are not indicated except for electrolytics and tantalums. All resistors are in and 1/4 W or less unless otherwise specified. f : internal component. 5 : fusible resistor. C : panel designation. Note: The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. Note: Les composants identifis par une marque 0 sont critiques pour la scurit. Ne les remplacer que par une pice por tant le numro spcifi.

Cirecuit Boards Location

Note on Printed Wiring Board: X : parts extracted from the component side. Y : parts extracted from the conductor side. a : Through hole. b : Pattern from the side which enables seeing. (The other layers' patterns are not indicated.) Caution: Pattern face side: (Conductor Side) Parts face side: (Component Side)

CLAMP MOTOR board

BD (CD) board IN SW board

SENSOR 2 board

Parts on the pattern face side seen from the pattern face are indicated. Parts on the parts face side seen from the parts face are indicated.
Indication of transistor.
C Q B E These are omitted.

SENSOR board

Q B C E These are omitted.
U : B+ Line. V : B Line. H : adjustment for repair. Voltages are taken with a VOM (Input impedance 10 M). Voltage variations may be noted due to normal production tolerances. Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal production tolerances. Circled numbers refer to waveforms. Signal path. E : MD PLAY (ANALOG OUT) j : MD REC (ANALOG IN) l : MD REC (DIGITAL IN) J : CD PLAY
OUT SW board CONNECTOR board INIT/COUNT SW board LOAD MOTOR board BD (MD) board
Printed wiring board of BD (CD) board is shown only for referring, because CD base unit is replaced as a block.

LED board AUDIO board

HP board

SW board

MAIN board DISPLAY board
PRINTED WIRING BOARD BD (CD) Board
See page 51 for Circuit Boards Location.

(Page 58)

There are a few cases that the part isn't mounted in model is printed on diagrams. Printed wiring board of BD (CD) board is shown only for referring, because CD base unit is replaced as a block.
SCHEMATIC DIAGRAM BD (CD) Board
See page 57 for Waveforms.

(Page 61)

Note on Schematic Diagram: Voltages and waveforms are dc with respect to ground under no-signal conditions. no mark : CD STOP ( ) : CD PLAY The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. Les composants identifis par une marque 0 sont critiques pour la scurit. Ne les remplacer que par une pice portant le numro spcifi.

Pin No. to 87 88. to to 119 to 124 to to 143 144
Pin Name VCC A18 VSS A17 to A9 SEL3 SEL2 SEL1, SEL0 WP VCC A8 VSS A7 to A0 D15 to D4 CLIP SEL I2CBUSY SPDIF LOCK LINE MUTE ADRESET D3 to D0 SPDIF MUTE NC VSS NC VCC IOP NC AVSS NC VREF AVCC NC
I/O O O I I I O O O I/O O I/O I O O I/O O O O I O O I O Power supply terminal (+3.5V)
Description Address signal output to the flash ROM (IC802) Ground terminal Address signal output to the flash ROM (IC802) Not used (open) Model setting input terminal (fixed at H in this set) Destination setting terminal (fixed at L in this set) Writing protect signal output to the flash ROM (IC802) Power supply terminal (+3.5V) Address signal output to the flash ROM (IC802) Ground terminal Address signal output to the flash ROM (IC802) Two-way data bus with the flash ROM (IC802) Not used (open) Not used (open) Lock signal input from the D/A converter (IC300) Audio line muting on/off control signal output Not used (open) Two-way data bus with the flash ROM (IC802) MD/CD digital input control signal output to the MD/CD selector (IC307) Not used (open) Ground terminal Not used (open) Power supply terminal (+3.5V) Optical pick-up voltage input from the automatic power control circuit Not used (open) Ground terminal (for analog system ) Not used (open) Reference voltage (+3.5V) input terminal (for A/D converter) Power supply terminal (+3.5V) (for analog system ) Not used (open)
MAIN BOARD IC805 M30622MA-1BOFP (DISPLAY CONTROLLER)
Pin No. 1 to 9 10. 17 18. 21 to to to 65 to to 80
Pin Name NC BYTE CNVSS NC XRESET XOUT GND XIN VCC NMI NC CMD CS NC FLBK CMD REQ CMD BUSY CMD CLK CMD RXD CMD TXD TXD1 RXD1 CLK1 RTS1 FL TXD NC FL CLK FL LAT RDY ALE HOLD HPLDA BCLK RD BHE WR P47 to P45 FNT CE OPEN A18 to A9 VCC A8 VSS A7 to A0 NC
I/O O I O I O I I O I O O O O I I O O O O O O O O O I O I O O O O O O O O O O O O Not used (open)
Description External data bus line byte selection signal input L: 16 bit, H: 8 bit (fixed at L) Ground terminal Not used (open) System reset signal input from the CD mechanism controller (IC800) L: reset For several hundreds msec. after the power supply rises, L is input, then it changes to H Main system clock output terminal (10 MHz) Ground terminal Main system clock input terminal (10 MHz) Power supply terminal (+5V) Non-maskable interrupt input terminal L active (fixed at H in this set) Not used (open) Communication INT signal input from the CD mechanism controller (IC800) Not used (open) Blanking signal output to the fluorescent indicator tube (FL900) Serial data transfer request signal output to the CD mechanism controller (IC800) Serial data transfer permission signal output to the CD mechanism controller (IC800) Serial data transfer clock signal input from the CD mechanism controller (IC800) Serial data input from the CD mechanism controller (IC800) Serial data output to the CD mechanism controller (IC800) Not used (open) Not used (open) Not used (open) Not used (open) Display serial data output to the fluorescent indicator tube (FL900) Not used (fixed at L) Display serial data transfer clock signal output to the fluorescent indicator tube (FL900) Display latch signal output to the fluorescent indicator tube (FL900) Not used (fixed at H) Not used (open) Not used (open) Not used (open) Not used (open) Not used (open) Not used (open) Not used (fixed at L) Not used (fixed at L) Not used (open) Not used (fixed at H) Not used (open) Power supply terminal (+5V) Not used (open) Ground terminal Not used (open) Not used (open)

0.15 F

AC voltmeter (0.75 V)
CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

Earth Ground

Fig. A. Using an AC voltmeter to check AC leakage.
Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be damaged by heat. Flexible Circuit Board Repairing Keep the temperature of the soldering iron around 270 C during repairing. Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). Be careful not to apply force on the conductor when soldering or unsoldering.
The laser component in this product is capable of emitting radiation exceeding the limit for Class 1.
This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior. The following caution label is located inside of the unit.
MXD-D40 SECTION 1 SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged and should be handled with care. CLEANING OBJECTIVE LENS OF OPTICAL PICK-UP In cleaning the objective lens of optical pick-up, be sure the following below. 1. In cleaning the lens, do not apply an excessive force. As the optical pick-up is vulnerable, application of excessive force could damage the lens holder. 2. In cleaning, do not use a cleaner other than exclusive cleaning liquid (KK-91 or isopropyl alcohol). 3. Wipe the objective lens spirally from center toward outside. (See Figure A)

For CD

NOTES ON LASER DIODE EMISSION CHECK The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pick-up block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens. LASER DIODE AND FOCUS SEARCH OPERATION CHECK Carry out the S curve check in CD section adjustment and check that the S curve waveforms is output three times.

(Figure A)

4. Eject the disk, if loaded. 5. Disconnect the power cord from the socket to shut off the power supply. 6. When cleaning the objective lens of optical pick-up in CD, refer to HOLDER (BU) ASSY on page 26.

For MD

NOTES ON LASER DIODE EMISSION CHECK Never look into the laser diode emission from right above when checking it for adjustment. It is feared that you will lose your sight.

CD-TEXT TEST DISC

This unit is able to display the test data (character information) written in the CD on its fluorescent indicator tube. The CD-TEXT TEST DISC (TGCS-313:4-989-366-01) is used for checking the display. To check, perform the following procedure. Checking Method: 1. Turn ON the power, set the disc to the disc table with the test disc label facing up, and chuck the disc. 2. Press the H (CD) button and play back the disc. 3. The following will be displayed on the fluorescent indicator tube. Display : 1KHZ 0DB 4. Rotating [ l AMS L ] (CD) knob, select the track. The text data of each track will be displayed. For details of the displayed contents for each track, refer to Table 1 : CD-TEXT TEST DISC TEXT Data Contents and Table 2 : CDTEXT TEST DISC Recorded Contents and Display. Restrictions in CD-TEXT Display In this unit, some special characters will not be displayed properly. These will be displayed as a space or a character resembling it. For details, refer to Table 2 : CD-TEXT DISC Recorded Contents and Display. Table 1 : CD-TEXT TEST DISC TEXT Data Contents (TRACKS No. 1 to 41:Normal Characters) TRACK No. 21 Displayed Contents 1kHz/0dB/L&R 20Hz/0dB/L&R 40Hz/0dB/L&R 100Hz/0dB/L&R 200Hz/0dB/L&R 500Hz/0dB/L&R 1kHz/0dB/L&R 5kHz/0dB/L&R 7kHz/0dB/L&R 10kHz/0dB/L&R 16kHz/0dB/L&R 18kHz/0dB/L&R 20kHz/0dB/L&R 1kHz/0dB/L&R 1kHz/1dB/L&R 1kHz/3dB/L&R 1kHz/6dB/L&R 1kHz/10dB/L&R 1kHz/20dB/L&R 1kHz/60dB/L&R 1kHz/80dB/L&R TRACK No. Displayed Contents 1kHz/90dB/L&R Infinity Zero w/o emphasis//L&R Infinity Zero with emphasis//L&R 400Hz+7kHz(4:1)/0dB/L&R 400Hz+7kHz(4:1)/10dB/L&R 19kHz+20kHz(1:1)/0dB/L&R 19kHz+20kHz(1:1)/10dB/L&R 100Hz/0dB/L* 1kHz/0dB/L* 10kHz/0dB/L* 20kHz/0dB/L* 100Hz/0dB/R* 1kHz/0dB/R* 10kHz/0dB/R* 20kHz/0dB/R* 100Hz Squer Wave//L&R 1kHz Squer Wave//L&R 1kHz w/emphasis/0.37dB/L&R 5kHz w/emphasis/4.53dB/L&R 16kHz w/emphasis/9.04dB/L&R
Note: The contents of Track No. 1 to 41 are the same as those of the current TEST DISC-their titles are displayed.
Table 2: CD-TEXT TEST DISC Recorded Contents and Display (In this unit, some special characters cannot be displayed. This is not a fault) TRACK No. to 99
Recorded contents ! # $ %& ( ) (21h to 27h)1kHz 0dB L&R (28h to 2Fh) (30h to 37h) (38h to 3Fh) (40h to 47h) (48h to 4Fh) (58h to 5Fh) (60h to 67h) (68h to 6Fh) (70h to 77h) (78h to 7Fh) (A0h to A7h) 8859-1 (A8h to AFh) (B0h to B7h) (B8h to BFh) (C0h to C7h) (C8h to CFh) (D0h to D7h) (D8h to DFh) (E0h to E7h) (E8h to FFh) (F0h to F7h) (F8h to FFh) AAAAAA D NOOOOO OUUUUY aaaaaa dnooooo ouuuu y y T All the same T All the same to T All the same c eeee i i i i C EEEE I I I I T All the same T All the same T All the same T All the same T All the same T All the same T All the same T All the same T All the same T All the same T All the same T All the same

groups; Tt [Check] Tt [Service] Tt [Develop] Tt.
Note: Do not use the test mode in the [Develop] group. If used, the unit may not operate normally. If the [Develop] group is set accidentally, press the [MENU/NO] button immediately to exit the [Develop] group.
3. RELEASING THE TEST MODE
Press the ?/1 button to display <MD Test> 5, then to turn the power OFF, turn the [l AMS L] (MD) knob and when <Initial> 8 displayed, press the [ l AMS L ] (MD) knob.
4. BASIC OPERATIONS OF THE TEST MODE All operations are performed using the [ l AMS L ] (MD) knob, [YES] button, and [MENU/NO] button.
The functions of these buttons are as follows.

Function name

Function Select. Set Sub menu. Proceeds onto the next step. Finalizes input. Returns to previous step. Stops operations.
[ l AMS L ] (MD) knob (turn) [ l AMS L ] (MD) knob (push) [YES] button [MENU/NO] button
5. SELECTING THE TEST MODE
There are 26 types of test modes as shown below. The groups can be switched by turning the [l AMS L ] (MD) knob. After selecting the group to be used, press the [YES] button. After setting a certain group, turn the [l AMS L ] (MD) knob switches between these modes. Refer to Group in the table for details can be selected. All items used for servicing can be treated using group [Service]. So be carefully not to enter other groups by mistake.
Note: Do not use the test mode in the [Develop] group. If used, the unit may not operate normally. If the [Develop] group is set accidentally, press the [MENU/NO] button immediately to exit the [Develop] group. Group Display AUTO CHECK Err Display TEMP ADJUST LDPWR ADJUST Iop Write Iop NV Save EF MO ADJUST EF CD ADJUST FBIAS ADJUST AG Set (MO) AG Set (CD) TEMP CHECK LDPWR CHECK EF MO CHECK EF CD CHECK FBIAS CHECK ScurveCHECK VERIFYMODE DETRK CHECK 0920 CHECK Iop Read Iop Compare ADJ CLEAR INFORMATION CPLAY2MODE CREC 2MODE No. C01 C02 C03 C04 C05 C06 C07 C08 C09 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C25 C26 C27 C28 C31 C36 C37 Automatic self-diagnosis Error history display, clear Temperature compensation offset adjustment Laser power adjustment Iop data writing Writes current Iop value in read nonvolatile memory using microprocessor Traverse (MO) adjustment Traverse (CD) adjustment Focus bias adjustment Auto gain output level adjustment (MO) Auto gain output level adjustment (CD) Temperature compensation offset check Laser power check Traverse (MO) check Traverse (CD) check Focus bias check S-curve check Nonvolatile memory check Detrack check Most circumference check Iop data display Comparison with initial Iop value written in nonvolatile memory Initialization of nonvolatile memory for adjustment values Display of microprocessor version, etc. Continuous playback mode Continuous recording mode Details Mark Check Service

3. Ending the continuous recording mode (1) Press the [MENU/NO] button. The display changes to CREC 2MODE (C37) and REC goes off. (2) Press the [A EJECT] button and take out the disc.
Note 1: The recording start addresses for IN, MID, and OUT are as follows.
IN 40h cluster MID 300h cluster OUT 700h cluster Note 2: The [MENU/NO] button can be used to stop recording anytime.
Note 3: Do not perform continuous recording for long periods of time above 5 minutes. Note 4: During continuous recording, be careful not to apply vibration.
6. FUNCTIONS OF OTHER BUTTONS
Function H (MD) x (MD) M (MD) m (MD) REC MODE PLAY MODE (MD) DISPLAY A EJECT ?/1 Contents Sets continuous playback when pressed in the STOP state. When pressed during continuous playback, the tracking servo turns ON/OFF. Stops continuous playback and continuous recording. The sled moves to the outer circumference only when this is pressed. The sled moves to the inner circumference only when this is pressed. Switches between the pit and groove modes when pressed. Switches the spindle servo mode (CLV S y CLV A). Switches the displayed contents each time the button is pressed Ejects the disc Releases the test mode
7. TEST MODE DISPLAYS Each time the [DISPLAY] button is pressed, the display changes in the following order.
When CPLAY and CREC are started, the display will forcibly be switched to the error rate display as the initial mode. 1. Mode display Displays TEMP ADJUST (C03), CPLAY2MODE (C36), etc. 2. Error rate display Displays the error rate in the following way. C= AD = C = : Indicates the C1 error. AD = : Indicates ADER. 3. Address display The address is displayed as follows. (MO: recordable disc, CD: playback only disc) h= s= (MO pit and CD) h= a= (MO groove) h = Indicates the header address. s = Indicates the SUBQ address. a = Indicates the ADIP address.
Note: is displayed when servo is not imposed.
Mode display Error rate display Address display Auto gain display (Not used in servicing) Detrack check display (Not used in servicing) IVR display (Not used in servicing) C1 error and jitter display (Not used in servicing) AD error and jitter display (Not used in servicing)
MEANINGS OF OTHER DISPLAYS
Display N X REC TOC EDIT L.SYNC OVER B/1 A-REP TRACK/(LP4)/calendar frame DISC/LP2 SHUF MONO Servo ON Tracking servo OFF Recording mode ON CLV low speed mode ABCD adjustment completed Tracking offset cancel ON Tracking auto gain OK Focus auto gain OK Pit High reflection CLV S CLV LOCK Groove Low reflection CLV A CLV UNLOCK Tracking offset cancel OFF Contents When Lit Servo OFF Tracking servo ON Recording mode OFF CLV normal mode When Off

8. AUTOMATIC SELF-DIAGNOSIS FUNCTION
This test mode performs CREC and CPLAY automatically for mainly checking the characteristics of the optical pick-up. To perform this test mode, the laser power must first be checked. Perform AUTO CHECK after the laser power check and Iop check. Procedure: 1. Press the [YES] button. If LDPWR is displayed, it means that the laser power check has not been performed. In this case, perform the laser power check and Iop compare, and then repeat from step 1. 2. If a disc is in the mechanical deck, it will be ejected forcibly. DISC IN will be displayed in this case. Load a test disc (MDW-74/GA-1) which can be recorded. 3. If a disk is loaded at step 2, the check will start automatically. 4. When XX CHECK is displayed, the item corresponding to XX will be performed. When 06 CHECK completes, the disc loaded at step 2 will be ejected. DISC IN will be displayed. Load the check disc (MD) TDYS-1. 5. When the disc is loaded in step 4, the check will automatically be resumed from 07 CHECK. 6. After completing to test item 12, check OK or NG will be displayed. If all items are OK, CHECK ALL OK will be displayed. If any item is NG, it will be displayed as NG:xxxx. When CHECK ALL OK is displayed, it means that the optical pick-up is normal. Check the operations of the other spindle motor, thread motor, etc. When displayed as NG:xxxx, it means that the optical pick-up is faulty. In this case, replace the optical pick-up.

9. INFORMATION

Display the software version. Procedure: 1. If displayed as INFORMATION, press the [YES] button. 2. The software version will be displayed. 3. Press the [MENU/NO] button to end this mode.
10. WHEN MEMORY NG IS DISPLAYED
If the nonvolatile memory data is abnormal, E0001/MEMORY NG will be displayed so that the MD deck does not continue operations. In this case, set the test mode promptly and perform the following procedure. Procedure: 1. Set the test mode (refer to page 28). 2. Normally a message for selecting the test mode will be displayed. However if the nonvolatile memory is abnormal, the following will be displayed INIT EEP?. 3. Press the x (MD) button and [A EJECT] button together. 4. Rotate the [ l AMS L ] (MD) knob and select MDM-7X2A. 5. Press the [ l AMS L ] (MD) knob. If the nonvolatile memory is successfully overwritten, the normal test mode will be set and a message to select the test mode will be displayed.
Set the CD test mode when performing confirmations (refer to page 12). After completing confirmation, release the CD test mode.

Iop = 82.5 mA in this case Iop (mA) = Digital voltmeter reading (mV)/1 ()
5. Press the [MENU/NO] button and display LDPWR CHECK (C13) and stop the laser emission. (The [MENU/NO] button is effective at all times to stop the laser emission.)
Note: After step 4, each time the [YES] button is pressed, the display will be switched between LD 0.7 mW $ , LD 7.5 mW $ , and LD Wp $. Nothing needs to be performed here.
Check Location: BD (MD) board (see page 44) 6-3. Iop Compare The current Iop value at laser power 7 mW output and reference Iop value (set at shipment) written in the nonvolatile memory are compared, and the rate of increase/decrease will be displayed in percentage.
Note: Perform this function with the optical pick-up set at room temperature.
Optical pick-up objective lens
digital voltmeter BD (MD) board CN105 pin 1 (I +3 V) CN105 pin 2 (IOP)
Procedure: 1. Rotate the [l AMS L] (MD) knob to display Iop Compare (C27). 2. Press the [YES] button and start measurements. 3. When measurements complete, the display changes to xx%yy. xx is the percentage of increase/decrease, and OK or NG is displayed at yy to indicate whether the percentage of increase/ decrease is within the allowable range. 4. Press the [MENU/NO] button to end this mode.
6-4. Auto Check This test mode performs CREC and CPLAY automatically for mainly checking the characteristics of the optical pick-up. To perform this test mode, the laser power must first be checked. Perform Auto Check after the laser power check and Iop compare. Procedure: 1. Press the [YES] button. If LDPWR is displayed, it means that the laser power check has not been performed. In this case, perform the laser power check and Iop compare, and then repeat from step 1. 2. If a disc is in the mechanical deck, it will be ejected forcibly. DISC IN will be displayed in this case. Load a test disc (MDW74/GA-1) which can be recorded. 3. If a disk is loaded at step 2, the check will start automatically. 4. When XX CHECK is displayed, the item corresponding to XX will be performed. When 06 CHECK completes, the disc loaded at step 2 will be ejected. DISC IN will be displayed. Load the check disc (MD) TDYS-1. 5. When the disc is loaded, the check will automatically be resumed from 07 CHECK. 6. After completing to test item 12 check, check OK or NG will be displayed. If all items are OK, CHECK ALL OK will be displayed. If any item is NG, it will be displayed as NG:xxxx. When CHECK ALL OK is displayed, it means that the optical pick-up is normal. Check the operations of the other spindle motor, sled motor, etc. When displayed as NG:xxxx, it means that the optical pick-up is faulty. In this case, replace the optical pick-up. 6-5. Other Checks All the following checks are performed by the Auto Check mode. They therefore need not be performed in normal operation. 6-6. Traverse Check 6-7. Focus Bias Check 6-8. C PLAY Check 6-9. Self-Recording/Playback Check

Adjusting Procedure: 1. Turn the [ l AMS L ] (MD) knob to display TEMP ADJUST (C03). 2. Press the [YES] button to select the TEMP ADJUST mode. 3. TEMP = [OK and the current temperature data will be displayed. 4. To save the data, press the [YES] button. When not saving the data, press the [MENU/NO] button. 5. When the [YES] button is pressed, TEMP = SAVE will be displayed and turned back to TEMP ADJUST (C03) display then. When the [MENU/NO] button is pressed, TEMP ADJUST (C03) will be displayed immediately. Specified Value: The TEMP = should be within E0 - EF, F0 - FF, 00 0F, 10 - 1F and 20 - 2F.
10. LASER POWER ADJUSTMENT
Check the Iop value of the optical pick-up before adjustments. (Refer to 8. Recording and Displaying Iop Information) Connection:
Adjusting Procedure: 1. Set the laser power meter on the objective lens of the optical pick-up. (When it cannot be set properly, press the m (MD) button or M (MD) button to move the optical pick-up) Connect the digital voltmeter to CN105 pin 1 (I+3V) and CN105pin 2 (IOP) on the BD (MD) board. 2. Turn the [ l AMS L ] (MD) knob to display LDPWR ADJUST (C04). (Laser power : For adjustment) 3. Press the [YES] button once to display LD 0.9 mW $. 4. Turn the [l AMS L ] (MD) knob so that the reading of the laser power meter becomes 0.85 to 0.91 mW. Press the [YES] button after setting the range knob of the laser power meter, and save the adjustment results. (LD SAVE $ will be displayed for a moment) 5. Then LD 8.4 mW $ will be displayed.
6. Turn the [ l AMS L ] (MD) knob so that the reading of the laser power meter becomes 8.2 to 8.6 mW, press the [YES] button to save it.
Note: Do not perform the emission with 7.0 mW more than 15 seconds continuously. 7. Then, turn the [ l AMS L ] (MD) knob to display
4. After Complete! is displayed momentarily, the display changes to Iop 7.0 mW. 5. After the display changes to Iop=yysave?, press the [YES] button. 6. When Complete! is displayed, it means that Iop NV saving has been completed.
LDPWR CHECK (C13). 8. Press the [YES] button once to display LD 0.9 mW $. Check that the reading of the laser power meter become 0.85 to 0.91 mW. 9. Press the [YES] button once more to display LD 8.4 mW $. Check that the reading the laser power meter and digital voltmeter satisfy the specified value. Note down the digital voltmeter reading value. Specified Value: Laser power meter reading : 8.4 0.3 mW Digital voltmeter reading : Value on the optical pick-up label 10% (Optical pick-up label)

12. TRAVERSE ADJUSTMENT

Note 1: Data will be erased during MO reading if a recorded disc is used in this adjustment. Note 2: If the traverse waveform is not clear, connect the oscilloscope as shown in the following figure so that it can be seen more clearly. oscilloscope (DC range)

Focus bias value B C A

14. ERROR RATE CHECK
14-1. CD Error Rate Check Checking Procedure: 1. Load the check disc (MD) TDYS-1. 2. Turn the [ l AMS L ] (MD) knob to display CPLAY2 MODE (C36). 3. Press the [YES] button twice and display CPLAY2MID. 4. The display changes to C = AD =. 5. Check that the C1 error rate is below 20. 6. Press the [MENU/NO] button to stop playback, then press the [ A EJECT] button and take out the check disc. 14-2. MO Error Rate Check Checking Procedure: 1. Load the continuously-recorded disc. (Refer to 5. USING THE CONTINUOUSLY RECORDED DISC) 2. Turn the [ l AMS L ] (MD) knob to display CPLAY2 MODE (C36). 3. Press the [YES] button to display CPLAY2MID. 4. The display changes to C = AD =. 5. If the C1 error rate is below 20, check that ADER is 00. 6. Press the [MENU/NO] button to stop playback, then press the [ A EJECT] button and take out the test disc.
16. AUTO GAIN CONTROL OUTPUT LEVEL ADJUSTMENT
Be sure to perform this adjustment when the optical pick-up is replaced. If the adjustment results becomes Adjust NG!, the optical pickup may be faulty or the servo system circuits may be abnormal. 16-1. CD Auto Gain Control Output Level Adjustment Adjusting Procedure: 1. Load the check disc (MD) TDYS-1. 2. Turn the [ l AMS L ] (MD) knob to display AG Set (CD) (C11). 3. When the [YES] button is pressed, the adjustment will be performed automatically. Complete!! will then be displayed momentarily when the value is recorded in the non-volatile memory, after which the display changes to AG Set (CD) (C11). 4. Press the [ A EJECT] button and take out the check disc. 16-2. MO Auto Gain Control Output Level Adjustment Adjusting Procedure: 1. Load the test disc (MDW-74/GA-1). 2. Turn the [ l AMS L ] (MD) knob to display AG Set (MO) (C10). 3. When the [YES] button is pressed, the adjustment will be performed automatically. Complete!! will then be displayed momentarily when the value is recorded in the non-volatile memory, after which the display changes to AG Set (MO) (C10). 4. Press the [ A EJECT] button and take out the test disc.

15. FOCUS BIAS CHECK

Change the focus bias and check the focus tolerance amount. Checking Procedure: 1. Load the continuously-recorded disc. (Refer to 5. USING THE CONTINUOUSLY RECORDED DISC) 2. Turn the [ l AMS L ] (MD) knob to display CPLAY2 MODE (C36). 3. Press the [YES] button twice to display CPLAY2MID. 4. Press the [MENU/NO] button when C = AD = is displayed. 5. Turn the [ l AMS L ] (MD) knob to display FBIAS CHECK (C16). / c =. 6. Press the [YES] button to display The first four digits indicate the C1 error rate, the two digits after / indicate ADER, and the 2 digits after c = indicate the focus bias value. Check that the C1 error is below 20 and ADER is below 2. 7. Press the [YES] button and display / b =. Check that the C1 error is about 100 and ADER is below 2. 8. Press the [YES] button and display / a =. Check that the C1 error is about 100 and ADER is below 2 9. Press the [MENU/NO] button, then press the [A EJECT] button and take out the disc.

3 IN1 LOADING MOTOR DRIVE IC400

6 IN2 REFERENCE 5

+5V REFERENCE VOLTAGE SWITCH Q400, 401

OUT-SW 49

M102 (SLED)

27 OUT2F 25 OUT2R

IN2F 29 IN2R 30

SFDR 92 SRDR 91

ANALOG MUX
S104 PLAY-SW LOAD LO S102 REFLECT 61 EEPROM IC195 SDA SCL WP SDA 45 SCL 47 EEP-WP PROTECT 44 1

OUT1 OUT2

PWM GENERATOR
A/D CONVERTER DIGITAL SERVO SIGNAL PROCESS

2-AXIS DEVICE

(TRACKING)

(FOCUS)

21 OUT1F 23 OUT1R

IN1F 19 IN1R 18

FFDR 88 FRDR 89
FROM CPU INTERFACE XLRF CKRF DTRF XLAT 80 SCLK 81 SWDT 82 HF MODULE SWITCH Q131 134

M103 (LOADING)

S102-1 (REFLECT RATE DETECT) ON: When the high reflection rate disc detect.
2 S102-2 (PROTECT DETECT) ON: When the rec-proof claw is close. (un-protect)
FCS TRK+ TRK 12 OUT3F 10 OUT3R IN3F 14 IN3R 15 TFDR 86 TRDR 85 DIGITAL SERVO SIGNAL PROCESSOR IC151 (2/2)

AUTO SEQUENCER

HF MODULE
BLOCK DIAGRAM MAIN Section

(Page 47)

ADDT LRCK BCK RESET SWITCH Q301
DATAO WS BCK PWON SCLK CLOCK CONTROL A/D CONVERTER IC301 DIGITAL INTERFACE DCCANCELLATION FILTER DECIMATION FILTER A/D CONVERTER BLOCK

LINE AMP IC305

L IN R ANALOG L OUT R

CLKOUT

CLOCK AND TIMING CIRCUIT

D/A CONVERTER IC300

RV301 PHONE LEVEL VOUTL 18 LOW-PASS FILTER IC100 (1/2), IC200 (1/2) VOUTR 22 LINE AMP IC100 (2/2), IC200 (2/2) HEADPHONE AMP IC2 J301 PHONES

INTERPOLATOR

NOISE SHAPER

SPDIF BUFFER IC307

AUDIO FEATURE PROCESSOR
SPDIFO SPDIFI IEC 958 DECODER DATA IN/OUT INTERFACE D/A CONVERTER BLOCK

IISOUTBCK

IISOUTWS

SLICER SEL LOCK

1 RESET LRCK, BCK

33 BCK

37 LRCK

MUTING Q100, 200

MUTING Q101, 201

LRCK, BCK

MUTING SWITCH Q300 DATA CLK SUBQ SQCK XLT SENS SCOR LDON SPNDL MUTE XRST DOUT D302 D300
MUTING CONTROL SWITCH Q302
CD BLOCK (BU-21BD53) OP ASSY (A-MAX. 2)

D303 PDOWN

CD DATA CD CLK SQ DATA SQ CLK XLT SENS SCOR LDON SPNDL MUTE XRST

DAC MUTE LINE MUTE

72 SPDIF_CUT

78 DA_RESET

79 SLICER_SEL

80 SPDIF LOCK

76 DAC MUTE

19 P. DOWN

77 LINE MUTE

(Page 49)

IIC DATA

LEVEL L 94 LEVEL R 95

LEVEL L LEVEL R
MD MECHANISM CONTROLLER IC801 (2/2) IIC CLK XOUT XIN

S. RST 12

(Page 49) RESET SWITCH Q501
30 S1 (IN/OUT) OUT IN ON: When tray is open/close. EXT_ON OUT SW 77 IN SW IIC-DATA 30 IIC-CLK 29
29 J302 PC LINK PCLK CONNCTOR 5 CLK DATA POWER PCLK INSERTED

X801 10MHz

CONNECT 22

X800 16MHz 2

SIGNAL PATH : CD PLAY : MD PLAY (ANALOG OUT) : MD REC (ANALOG IN)
X-OUT 7 OUT2 MOTOR OUT1 DRIVE IN2 INLOAD NEG 73 LOAD POS X-IN 15 MD RST 26

M702 (LOADING)

LOADING MOTOR DRIVE IC401
SYSTEM CONTROLLER (CD MECHANISM CONTROLLER) IC800 (1/2)
BLOCK DIAGRAM DISPLAY/POWER SUPPLY Section

FL/LED DRIVE IC751

SEG01 35

S731 736

FLCLK FLWITE S741 746, SKEY3

COM02 23

90 KEY2
REMOTE CONTROL RECEIVER IC781

S01 S35

G02 G23
FLUORESCENT INDICATOR TUBE FL751

COM01 39

FL DRIVE Q754 FL DRIVE Q753 LED DRIVE Q752 LED DRIVE Q751 LED DRIVE Q791 LED DRIVE Q781 D752 CD SYNCHRO HIGH
COMS91 KEYSW A S721 l AMS L PUSH ENTER (MD) S4 GND ROTARY ENCODER B 67 JOGMDJOGMD1 FLCS DISP RESET CS RESET P3 74
SYSTEM CONTROLLER (CD MECHANISM CONTROLLER) IC800 (2/2)

D751 CD SYNCHRO NORMAL

D791 MDLP D781 STANDBY POWER ON/OFF RELAY DRIVE Q500 *RY600 (Singapore model) RY650 (Except Singapore model) * (Singapore model) S600 VOLTAGE SELECTOR 110 120V 220 240V SUB POWER TRANSFORMER * Except Singapore model LINE FILTER * *T602 (Singapore model) T652 (Except Singapore model) AC IN
92 KEYSW A S701 l AMS L PUSH ENTER (CD) 4 GND ROTARY ENCODER B 65 JOGCD0

STB P_DOWN

RESET 66 JOGCD1
12 SYSTEM CONTROLLER (CD MECHANISM CONTROLLER) (IC800) +5V MD MECHANISM CONTROLLER (IC801) +3.3V +3.3V REGULATOR Q503
+5V REGULATOR, RESET SIGNAL GENERATOR IC505

RECT D519 522

*LF651 (Except Singapore model) LF798 (Singapore model)

POWER DETECT SWITCH Q502

FLUORESCENT INDICATOR TUBE (FL751) 13 P. DOWN DISPLAY SECTION
AC AC B+ (BACK+5V) B (32V) 32V REGULATOR IC504

PDOWN BACK UP +3.3V

RECT D510

11 V. BAK D523 D524

BT500 LITHUM BATTERY (ML1220) SYSTEM CONTROLLER (IC801) , FLASH MEMORY (IC802) +3.5V 8
+10V REGULATOR IC500 CD SECTION +7V CDM SECTION +7V AC 2
+10V REGULATOR IC502 +7V REGULATOR IC501

RECT D511 514

SYS3.5
RECT D501, 502 MAIN POWER TRANSFORMER * *T601 (Singapore model) T651 (Except Singapore model)
VCC1 VCC2 +3.5V REGULATOR IC190 ANALOG LINE OUT CIRCUIT +3.3V +3.3V REGULATOR Q504
CD SECTION +5V RV500 +5V REGULATOR IC506 B+ ANALOG LINE OUT CIRCUIT B

RECT D507, 508

+3.3V MD SECTION +5V PCLK CONNECTOR +5V

+5V VOLTAGE

RECT D505, 506 RECT D503, 504

10 S. RST

NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS (In addition to this, the necessary note is printed in each block)

* I (S) stands for schmitt input, I (A) for analog input, O (3) for 3-state output, and O (A) for analog output in the column I/O.

Pin No. 88

Pin Name XCAS A09 XRAS XWE D1 D0 D2 D3 MVCI ASYO ASYI AVDD BIAS RFI AVSS PCO FILI FILO CLTV PEAK BOTM ABCD FE AUX1 VC ADIO AVDD ADRT ADRB AVSS SE TE DCHG TEST4 ADFG F0CNT XLRF CKRF DTRF APCREF TEST0 TRDR TFDR DVDD FFDR
I/O O O O O I/O I/O I/O I/O I (S) O I (A) I (A) I (A) O (3) I (A) I (A) I (A) I (A) I (A) I (A) I (A) I (A) I (A) I (A) I (A) I (A) I (A) I I (S) O O O O O O O O O
Description Column address strobe signal output to the D-RAM (IC152) L active Address signal output to the D-RAM (IC152) Row address strobe signal output to the D-RAM (IC152) L active Write enable signal output to the D-RAM (IC152) L active
Two-way data bus with the D-RAM (IC152)
Digital in PLL oscillation input from the external VCO Playback EFM full-swing output terminal

Not used (fixed at L)

Playback EFM asymmetry comparator voltage input terminal Power supply terminal (+3.3V) (analog system) Playback EFM asymmetry circuit constant current input terminal Playback EFM RF signal input from the CXA2523AR (IC101) Ground terminal (analog system) Phase comparison output for master clock of the recording/playback EFM master PLL Filter input for master clock of the recording/playback master PLL Internal VCO control voltage input of the recording/playback master PLL Light amount signal (RF/ABCD) peak hold input from the CXA2523AR (IC101) Light amount signal (RF/ABCD) bottom hold input from the CXA2523AR (IC101) Light amount signal (ABCD) input from the CXA2523AR (IC101) Focus error signal input from the CXA2523AR (IC101) Auxiliary signal (I3 signal/temperature signal) input from the CXA2523AR (IC101) Middle point voltage (+1.65V) input from the CXA2523AR (IC101) Not used (open) Power supply terminal (+3.3V) (analog system) A/D converter operational range upper limit voltage input terminal (fixed at H in this set) A/D converter operational range lower limit voltage input terminal (fixed at L in this set) Ground terminal (analog system) Sled error signal input from the CXA2523AR (IC101) Tracking error signal input from the CXA2523AR (IC101) Connected to the +3.3V power supply Input terminal for the test Not used (fixed at H) ADIP duplex FM signal (22.05 kHz 1 kHz) input from the CXA2523AR (IC101) Filter f0 control signal output to the CXA2523AR (IC101) Serial data latch pulse signal output to the CXA2523AR (IC101) Serial data transfer clock signal output to the CXA2523AR (IC101) Writing serial data output to the CXA2523AR (IC101) Control signal output to the reference voltage generator circuit for the laser automatic power control Input terminal for the test Not used (open)

Pin No. 47 to to to 84 85
Pin Name SPNDL_MUTE NC NC LED_RECMODE LED_DATA LED_CLK LED_STB NC DISP_RESET VCC STB VSS JOGCD0 JOGCD1 JOGMD0 JOGMD1 NC LOAD_POS LOAD_NEG OUT_SW MID_OUT_SW IN_SW MID_IN_SW CLP_POS CLP_NEG INIT_SW COUNT_SW E3 E1 E2
I/O O O O O O O O I I I I O O I I I I O O I I I I I Not used (fixed at H in this set) Not used (open)
Description Spindle motor muting control signal output to the CD block
LED on/off control signal output terminal Not used (open) LED control serial data output terminal Not used (open) LED control serial data transfer clock signal output terminal Not used (open) LED control strobe signal output terminal Not used (open) Not used (open) Reset signal output to the display controller (IC751) Power supply terminal (+5V) Strobe signal output to the power supply circuit L: standby mode, H: power on Ground terminal Jog dial pulse input from the rotary encoder (S701 l AMS L PUSH ENTER (CD)) B phase input Jog dial pulse input from the rotary encoder (S701 l AMS L PUSH ENTER (CD)) A phase input Jog dial pulse input from the rotary encoder (S721 l AMS L PUSH ENTER (MD)) B phase input Jog dial pulse input from the rotary encoder (S721 l AMS L PUSH ENTER (MD)) A phase input Not used (open) CD loading motor (M702) control signal output to the motor driver IC (IC401) L active *1 CD loading motor (M702) control signal output to the motor driver IC (IC401) L active *1 Detection input from the tray open/close detect switch (S1) on the CD mechanism block L: when tray is open, H: when tray is close Detection input from the mid out detect switch on the CD mechanism block L: when tray is going to open or close Not used (open) Detection input from the tray open/close detect switch (S1) on the CD mechanism block L: when tray is close, H: when tray is open Detection input from the mid in detect switch on the CD mechanism block L: when sub tray move between tray and stocker Not used (open) CD elevator up/down motor control signal output terminal Not used (open) L active CD elevator up/down motor (M701) control signal output terminal Not used (open) L active Detection input from the INIT detect switch on the CD mechanism block L: when elevator down to bottom, others: H Not used (open) Detection input from the count detect switch on the CD mechanism block L: when elevator up/down each sub tray stock position Not used (open) Detection input from the disc tray address detect rotary encoder on the CD mechanism block Not used (open)

Ref. No. 319 320

Part No. 4-227-012-01 4-227-019-02 4-227-013-01 4-226-995-01 4-226-996-01 4-226-997-04 4-226-998-01 4-227-006-01 A-4735-075-A 4-226-994-01
Description SPRING (HOLDER), TENSION PLATE (HOLDER), RETAINER SPRING (EJ), TENSION SLIDER (EJ) LIMITER (EJ) SLIDER LEVER (CHG) GEAR (SA) HOLDER ASSY GUIDE (L)
7-5. MD MECHANISM DECK SECTION-2 (MDM-7X2A) 359

#1 A #1

363 361

353 353

351 369
The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. Les composants identifis par une marque 0 sont critiquens pour la scurit. Ne les remplacer que par une pice portant le numro spcifi.

Ref. No. 362 363

Part No. A-4725-430-A 4-231-319-01 3-372-761-01 4-226-993-01 4-227-014-01 4-226-992-01 1-678-514-11 A-4672-976-A 4-988-560-01 4-996-265-01
Description BD (MD) BOARD, COMPLETE SCREW (2X6) CZN, +B (P) TRI SCREW (M1.7), TAPPING RACK SPRING (RACK), COMPRESSION BASE, SL FLEXIBLE BOARD OPTICAL PICK-UP KMS-262A SCREW (+P 1.7X6) SHAFT, MAIN
Ref. No. HR901 M101 M102 M103 S102
Part No. 4-230-716-01 4-227-004-01 4-227-005-01 4-227-008-01 4-227-009-01 4-232-270-01 1-500-670-11 A-4735-029-A A-4672-900-A A-4672-975-A
Description SPRING (SPDL), TORSION GEAR (LC) GEAR (LD) GEAR (SC) GEAR (SD) SCREW (1.7X3.5), +PWH HEAD, OVER WRITE MOTOR ASSY, SPINDLE (for MD) MOTOR ASSY, SLED (for MD) MOTOR ASSY, LOADING (for MD)
4-226-989-01 CHASSIS 4-211-036-01 SCREW (1.7X2.5), +PWH 4-226-990-01 BASE (BU-A)
1-771-957-11 SWITCH, PUSH (2 KEY) (REFLECT RATE DETECT, PROTECT DETECT)
7-6. CD MECHANISM DECK SECTION (CDM55B-21BD53) 505 509

514 523

525 526

515 519

Ref. No. 511 512
Part No. 4-226-180-01 4-925-315-31 1-674-336-21 4-220-229-01 4-220-239-11 4-220-233-01 4-220-238-01 4-220-234-01 4-227-598-01 4-221-816-11
Description TRAY (55-L) DAMPER LOADING BOARD LEVER (SW) SPRING, TORSION CAM (CDM55) GEAR (B) PULLEY (LDG) SPACER (55) BELT (CDM55)

Ref. No. M702

Part No. 4-227-236-01 X-4953-233-1 4-220-951-02 4-227-899-21 A-4677-295-A 4-230-386-01 4-230-389-01 4-227-218-21 4-985-672-01 4-228-353-11
Description CHASSIS (CDM55C) PULLEY (AT) ASSY SHEET (KH) SCREW (DIA. 12), FLOATING BU-21BD53 INSULATOR (BU21) SPRING, CONE COIL HOLDER (AT) SCREW (+PTPWHM2.6), FLOATING HOLDER (55-BU21)
4-220-237-01 GEAR (A) 4-221-815-11 ROLLER
4-229-358-01 SHAFT (BU21) A-4672-771-A MOTOR (LD) ASSY (LOADING) (for CD)

MXD-D40 BD (MD)

NOTE: Due to standardization, replacements in the parts list may be different from the parts specified in the diagrams or the components used on the set. -XX and -X mean standardized parts, so they may have some difference from the original one. RESISTORS All resistors are in ohms. METAL: Metal-film resistor. METAL OXIDE: Metal oxide-film resistor. F: nonflammable