ORDER No.MD0004060C3

CD Stereo System

SA-AK48
Colour (S).. Silver Type Areas (GC). Asia, Latin America, Middle East and Africa. TAPE SECTION : AR2 MECHANISM SERIES CD SECTION : RAE0152Z-M TRAVERSE DECK SERIES SYSTEM : SC-AK48

Specifications

qAMPLIFIER SECTION PMPO RMS power output THD 10%, both channels driven (HIGH) 40W (MID) 40W (LOW) 120W (TOTAL) 200W Input sensitivity AUX MIC Input inpedance AUX MIC qFM TUNER SECTION Frequency range Sensitivity S/N 26dB Antenna terminal (s) qAM TUNER SECTION Frequency range Sensitivity S/N 20dB (at 999kHz) 552-1629kHz (9kHz steps) 520-1630kHz (10kHz steps) 560V/m 87.50 - 108.00MHz (50kHz steps) 2.5V (IHF) 2.2V 75 (unbalanced) qCD SECTION Sampling frequency Decoding Beam source/wave length Number of channels Frequency response Wow and flutter Digital filter 44.1kHz 16 bit linear Semiconductor laser/ 780nm Stereo 20Hz - 20kHz (+1dB, -2dB) Below measurable limit 8fs 13.9k 680 250mA 0.7mV per per per per channel channel channel channel (6) (6) (6) (6) 3000W qCASSETTE DECK SECTION Track system Heads Record/playback Erasure Motor Recording system Erasing system Tape speed Frequency response (+3, -6dB) at DECK OUT NORMAL (TYPE I) HIGH (TYPE II) S/N Wow and flutter Fast forward and rewind time 35Hz - 14kHz 35Hz - 14kHz 50dB (A weighted) 0.18% (WRMS) Approx. 120 seconds with C-60 cassette tape Soild permalloy head Double gap ferrite head DC servo motor AC bias 100kHz AC erase 100kHz 4.8cm/s 4 track, 2 channel
2000 Matsushita Electric Industrial Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law.
D/A converter qGENERAL Power supply : Power consumption Power consumption in standby mode Eco mode on Eco mode off Dimensions (WxHxD)

MASH (1bit DAC)

Weight
AC110V/127V/220V/ 230-240V, 50/50Hz 220W

Notes:

1. Specifications are subject to change without notice. Weight and dimensions are approximate. 2. Total harmonic distortion is measured by the digital spectrum analyzer.

0.8W 14W 270x331x338mm

qSYSTEM SC-AK48 : Main unit : SA-AK48 Speakers : SB-AK48

CONTENTS

1 Accessories 2 Before Repair 3 Protection Circuitry 4 Handling Precautions for Traverse Deck 4.1. Handling the traverse deck (optical pickup) 4.2. Grounding for electrostatic breakdown prevention 4.3. Caution when Replacing the Traverse Deck 5 Precaution of Laser Diode 6 Location of Controls 7 Location of Controls for Remote Control Transmitter 10 Self-Diagnostic Display Function 11 Description of Error Code 11.1. Error Detection for Cassette Mechanism block 11.2. Error Detection for CD/Changer block 11.3. Error Detection for Cassette Mechanism block 12 CD Test Mode Function 13 Measurement and Adjustments 13.1. Tuner Section 13.2. Cassette Deck Section 14 Illustration of ICs, Transistors and Diodes 15 Schematic Diagram 15.1. Schematic Diagram Notes 15.2. Schematic Diagram 16 Printed Circuit Board Diagram 17 Block Diagram 18 Troubleshooting Guide 19 Wiring Connection Diagram Terminal Function of ICs 20.1. IC600 (M38199MF227):System Control and FL Driver 20.2. IC701 (AN8839NSBE2):Servo Amp 20.3. IC702 (MN662790RSC):Servo Processor/Digital Signal 27 Processor/Digital Filter/D/A converter 20.4. IC703 (AN8739SBE2):Focus Coil/Tracking Coil/Traverse Motor/SpindleMotor Drive 21 Replacement Parts List 22 Cabinet Parts Location 23 Mechanism Parts Location CD Mechanism Parts Location 25 Packaging 81
8 Operation Checks and Component Replacement Procedures 8 8.1. Checking for the main P.C.B. 8.2. Disassembly for the CD changer assy 8.3. Checking for the unit operational condition 8.4. Replacement for the traverse deck assy 8.5. Replacement for the disc tray 8.6. Disassembly and reassembly for mechanism base drive unit 8.7. Replacement for the motor assy 8.8. Replacement for the pinch roller assy and head block 8.9. Replacement for the CD motor assy, capstan belt A, capstan belt B and winding belt 16

8.10. Replacement for the components parts on the mechanism P.C.B. 8.11. Replacement for the cassette lid assy 8.12. Measure for tape trouble 9 Checking Procedure for Self-operation of Cassette Mechanism Assy 9.1. Operation Check Providing with Cassette Tape 9.2. Operation Check Not Provided with Cassette Tape 30

1 Accessories

2 Before Repair
1. Turn off the power supply. Using a 10, 10W resistor, connect both ends of power supply capacitors (C571 - 574, 558) in order to discharge the voltage. 2. Before turning the power supply on, after completion of repair, slowly apply the primary voltage by using a power supply voltage controller to make sure that the consumed current at 50Hz in NO SIGNAL mode should be shown below with respect to supply voltage 230/230-240V.
Power supply voltage Consumed current AC230V, 50Hz Less than 250mA AC230 - 240V, 50Hz Less than 250mA

3 Protection Circuitry

The protection circuitry may have operated if either of the following conditions are noticed: No sound is heard when the power is switched ON. Sound stops during a performance. The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative speaker connection wires are shorted, or if speaker systems with an impedance less than the indicated rated impedance of the amplifier are used. If this occurs, follow the procedure outlines below: 1. Switch OFF the power. 2. Determine the cause of the problem and correct it. 3. Switch ON the power once again. Note: When the protection circuitry functions, the unit will not operate unless the power is first switched OFF and ON again.
4 Handling Precautions for Traverse Deck
The laser diodes in the traverse deck (optical pickup) may break down due to potential difference caused by static electricity of clothes or human body. So, be careful of electrostatic breakdown during repair of the traverse deck (optical pickup).
Handling the traverse deck (optical pickup)
1. The traverse deck (optical pickup) is an extremely highprecision construction and must not be subjected to impact, excessive vibration, or other types of rough handling. 2. In order to prevent static electricity damage to the laser diode, use a short pin or similar tool to short the optical pickups flexible circuit boards after they have been disconnected from the main circuit board. 3. Handle the flexible circuit boards with care; excessive force could cause them to be broken. 4. Do not turn the pre-set variable resistor (for adjustment of the laser power); it has been adjusted at the factory. (as shown in Fig.1)
Caution: The static electricity of your clothes will not be grounded through the wrist strap. So, take care not to let your clothes touch the traverse deck (optical pickup)

13 Measurement and Adjustments

13.1. Tuner Section

13.1.1. Measuring Instruments and Special Tools
AM signal generator (AM-SG) EVM-AC (AC Electronic voltmeter) EVM-DC (DC Electronic voltmeter) Osciloscope Choke coil (100H) AM loop antenna Note: Trimmer will be instability that once you tighten, please adjust with tighten slowly from loosened condition. Adjust OSC coil and IFT with nonmetal driver.

13.1.3. AM RF Adjustment

1. Connect the instrument as shown in Fig.3. 2. Set the unit to AM mode. 3. Set AM-SG to 522kHz. 4. Receive 522kHz in the unit. 5. Adjust Z101 (OSC) so that the EVM-AC is maximized. 6. Set AM-SG to 603kHz. 7. Receive 603kHz in the unit. 8. Adjust Z101 (ANT) so that the EVM-AC is maximized. 9. Set AM-SG to 522kHz. 10. Receive 522kHz in the unit. 11. Adjust Z101 (OSC) so that the EVM-DC value is within 0.51.4V.

13.1.2. AM IF Adjustment

1. Connect the instrument as shown in Fig.1. 2. Set the unit to AM mode. 3. Apply signal sa shown in Fig.1 from AM-SG. 4. Adjust Z102 so that the output frequency is maximized in Fig.2.

13.1.4. Adjustment point

13.2. Cassette Deck Section
13.2.1. Measuring Instruments and Special Tools
Digital frequency counter EVM-AC (AC Electronic voltmeter) Test tape QZZCFM : Head azimuth adjustment QZZCWAT : Tape speed adjustment QZZCRA : Normal reference blank tape QZZCRX : CrO2 tape
13.2.2. Head Azimuth Adjustment (Deck 1/2)
Caution: Please replace both azimuth adjustment screws (RHE5152ZB) and springs (RMB0331) simultaneously when readjusting the head azimuth. (Shown in Fig.5). Even if you wish to readjust the head azimuth without replacing the screws and springs, a fine adjustment cannot be done because of the screw-locking bond adhered to the azimuth screw and spring. Please remove the screw-locking bond left on the head base when replacing the azimuth screw. If you wish to readjust the head azimuth, be sure to adjust with adhering the cassette tape closely to the mechanism by pushing the center of cassette tape with your finger. (shown in Fig.6) 1. Connect the measuring instrument as shown in Fig.7. 2. Playback the azimuth adjustment portion (8kHz, -20dB) of test tape (QZZCFM). Adjust the azimuth adjusting screw until the outputs of the L/R-ch are maximized. (Refer to Fig.8) Make sure that the difference in the peak level between the left and right channels does not exceed 0.5dB. 3. Perform the same adjustment in reverse playback mode. Checking of the level difference forward and reverse directions 4. Playback the playback gain adjustment portion (315Hz, 0dB) of test tape (QZZCFM). Check if level difference between forward and reverse direction is within 1.5dB. 5. After the adjustment, apply screwlock to the azimuth adjusting screw.

13.2.3. Tape Speed Adjustment (Deck 1/2)
1. Insert the test tape (QZZCWAT) to Deck 2 and playback (FWD side) the middle portion of it. 2. Adjust motor VR (Deck 2) for the output value shown below. Adjustment target : 2940 - 3060Hz (NORMAL speed) 3. After alignment, assure that the output frequency of the DECK2 REV and DECK1 FWD are within 45Hz and 60Hz respectively of the value of the output frequency of DECK2 FWD.

Fig.9 Fig.5

Fig.10
13.2.4. Bias OSC Frequency Adjustment (Deck 2)
1. Set the unit to AUX position. 2. Insert the Normal blank tape (QZZCRA) into DECK2 and set the unit to REC mode (use REC/STOP key). 3. Adjust L1201 so that the output freguency is within the standard value. Standard value : 978kHz
Standard value (CrO2) : 175mV

Fig.12

13.2.6. Erase Voltage Check
1. Set the unit to AUX position. 2. Insert the Normal blank tape (QZZCRA) into DECK2 and set the unit to REC mode (use REC/STOP key). 3. Measure and make sure that the output is within the standard value. 4. Insert the CrO2 tape (QZZCRX).

Fig.11

13.2.5. Bias Voltage Check
1. Set the unit to AUX position. 2. Insert the Normal blank tape (QZZCRA) into DECK2 and REC/STOP key). set the unit to REC mode (use 3. Measure and make sure that the output is within the standard value. 4. Insert the CrO2 tape (QZZCRX). 5. Repeat step 2 and 3. Standard value (Normal) : 144mV
5. Repeat step 2 and 3. Standard value (Normal) : more than 80mV Standard value (CrO2) : more than 90mV

Fig.13

13.2.7. Adjustment Point

Fig.14

14 Illustration of ICs, Transistors and Diodes
AN8839NSBE2 BU2090AF-E2 LA1833NMNTLM LC72131MDTRM M51167AFP-TB M62456FPE1 M62457FPE1 AN8739SBE2
28PIN 16PIN 24PIN 20PIN 36PIN 24PIN 16PIN

MN662790RSC

41. 80 40. 1

M5218AP

BA7755A

M62433AFP

M38199MF227

51. 100 50.. 1

0N2180RLC1

TA7291P

STK470-040
RSN311W64A-P 2SB621ARSTA 2SB621RTA 2SD1302STA 2SD965RTA KTA12710YTA
2SJ498CDTA 2SB1436R 2SC2002KTA 2SC2786MTA 2SC2787FL1TA

2SC3940AQSTA

1SS291TA MA700ATA

UDZSTE175R1B

Cathode

RK306LFU1

2SA933SSTA 2SC1740SSTA 2SC2058SPTA 2SD2144STA KRA102MTA
KRC102MTA KRC103MTA KRC110MTA KTC3199GRTA RVTDTC143EST
2SA1037AKSTX 2SC2412KT96R 2SD2114K1V DTA114EKA146 DTA143XKA146 DTC114TKA146
DTC144TKA146 KRA102STA KRC102STA KRC111STA KTC3875GRTA KTD1304TA

2SK544F-AC

1D3E RL1N4003S-P
MTZJ10BTA Cathode MTZJ12BTA MTZJ15CTA MTZJ16BTA MTZJ30BTA MTZJ4R7BTA MTZJ7R5ATA

MA165TA RVD1SS133TA

MA4020LTA
GP1S94 SLI325DCT31 SLI325URCT31 SLR325MCT31W

SVC211SPA-AL

Cathode Anode

E A Ca C E A Ca C

Cathode Anode Cathode

MA111TX 1SS355TE17

MA8036HTX MA8047MTX

KBP152G4R5

DAP202KT146

MA723TA

LNJ301MPUJAD

15 Schematic Diagram

15.1. Schematic Diagram Notes
This schematic diagram may be modified at any time with the development of new technology. Notes:
S1 S2 S3 S4 S5 S501 S600 S601 S602 S603 S604 S605 S606 S607 S608 S609 S610 S611 S612 S613 S614 S615 S616 S617 S618 S619 : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : Tray position 1 detect switch in OFF position Tray position 2 detect switch in OFF position Tray open detect switch in OFF position Clump switch in OFF position Bottom switch on OFF position Voltage select switch (VOLT ADJ) Sound control jog switch (SOUND CONTROL JOG) TRI-AMP control switch (LOW) Auxiliary input switch (AUX) Deck1 open switch ( DECK1 OPEN) CD management switch (CD MANAGER) Tuner/band select switch (TUNER/BAND) Tape edit switch (TAPE EDIT) Disc5 direct open/close switch ( ) CD switch (CD) Recording start/stop switch ( REC/STOP) Disc direct play switch (CD5) Tape/deck select switch (TAPE/DECK1/2) Reverse mode select switch (REV MODE) Disc4 direct open/close switch ( ) EQ down switch ( ) Super woofer switch (S. WOOFER) Disc2 open switch ( DECK2 OPEN) Disc direct play switch (CD4) EQ left switch ( ) Display select/demonstration mode switch (-DISPLAY/DEMO) Playback, tuning, time adjust switch , TUNE/TIME ADJ) ( Play timer/record timer switch ( PLAY/ REC) EQ up switch ( ) Disc3 direct open/close switch ( ) Karaoke switch (KARAOKE) Clock/timer select switch (CLOCK/TIMER) EQ right switch ( ) Disc direct play switch (CD3) Eco switch (MODE) Stop/tune mode switch ( /TUNE MODE) Disc2 direct open/close switch ( ) Random play switch (RANDOM) FF/skip, memory switch ( , MEMORY) Disc2 direct play switch (CD2) Playback/pause, tuning, time adjust switch , TUNE/TIME ADJ ) ( Disc1 direct open/close switch ( ) Disc direct play switch (CD1) REW/R.skip, FM mode/beat proof switch , FM MODE/BP) ( Standby/on switch ( /I) 3D AI EQ switch (3D AI EQ) TRI-AMP control switch (MID) TRI-AMP control switch (HIGH) Rest switch (REST) Deck1 mode detect switch (MODE) Deck1 half detect switch (HALF) Deck1 CrO2 tape detect switch (ATS/CrO2) Deck2 mode select switch (MODE) Deck2 half detect switch (HALF) Deck2 CrO2 tape detect switch (ATS/CrO2) S974 : Deck2 reverse side record prevention tab detect switch (R. REC. INH) S975 : Deck2 forward side record prevention tab detect switch (F. REC. INH) VR600 : Volume control (VOLUME) VR601 : Microphone volume control (MIC VOL)

Indicated voltage values are the standard values for the unit meaured by the DC electronic circuit tester (highimpedance) with the chassis taken as standard. Therefore, there may exist some error in the voltage values, depending on the internal impedance of the DC circuit tester. No mark. CD STOP.. CD playback (1kHz, L+R, 0dB).. FM.. AM.. DECK2 playback.. DECK2 record Important safety notice: mark have special Components identified by characteristics important for safety. Furthermore, special parts which have purposes of fireretardent (resistors), hight-quality sound (capacitors), lownoise (resistors), etc. are used. When replacing any of components, be sure to use only manufacturers specified parts shown in the parts list. Caution! IC and LSI are sensitive to static electricity. Secondary trouble can be prevented by taking care during repair. Ground the soldering iron. Put a conductive mat on the work table. Do not touch the legs of IC or LSI with the fingers directly. *L10-L12 are printed coils formed on the P.C.B. and thus not found in the Replacement Parts list. Voltage and signal line : Positive voltage line : Negative voltage line : CD signal line : FM signal line : FM OSC signal line : AM signal line : AM OSC signal line : Tape playback signal line Tape recording signal line : Front low SP drive signal line : Front mid/high SP drive signal line : Mic signal line
S620 S621 S622 S623 S624 S625 S626 S627 S628 S629 S630 S631 S632 S633 S634
S635 S636 S637 S638 S639 S640 S641 S701 S951 S952 S953 S971 S972 S973

15.2. Schematic Diagram

SCHEMATIC DIAGRAM-1
NOTE: The number which noted at the connectors on the schematic diagram as "SCHEMATIC DIAGRAM-1" or "SCHEMATIC DIAGRAM-2" indicates the schematic diagram serial number located on the left corner in the schematic diagram.

A CD SERVO CIRCUIT

OPTICAL PICKUP

C701 6.3V33 R701 4.7

:POSITIVE VOLTAGE LINE

:CD PLAYBACK SIGNAL LINE

S ((0V)) G ((0V)) 4.5V

Q1104 2SJ498CDTA

D ((0V))

TP5 R1195 100K S ((0V)) ((4.4V)) G 0.1V

R1101 330K

IC1102 BA7755A

R/P SELECT

Q1102 2SJ498CDTA
HEAD SELECT ((0V)) (REC:ON) C1102 1000P R1184 100K 14.6V R1181 3.3K TP171 TP172 TP170
C1194 1000P C1183 0.47 VCC 3 ((7.8V)) ((0V)) 10.8V R1188 1K 4 ((0V)) 4.8V GND 5 C1177 1000P 14.3V ((14.7V)) 0.6V ((0V)) 0V ((0.1V)) 0.6V ((0V)) C1178 1000P C1180 0.01

R1104 15K

R1189 4.7K

Q1175,1176 2SC2002KTA

BIAS OSC R1179 2.7K
LH C1181 0.01 0.9V ((0V)) C1179 0.01 R1178 1.2 0.1V ((0V)) C1176 0.047

LC1185 4700P 5 4

R1180 2.7K

3 C1175 35V220

14.3V ((14.7V))

R1173 10K

D1175 MA111TX R1174 10K D1172 MA8047MTX R1176 4.7K R1177 5.6K 0.6V ((0V))

Q1171 2SD1302STA

SWITCHING (REC:ON) ((0V))

C1174 50V4.7

D1174 MA8036HTX ((0V)) 0.7V RR1170 1K

((0V))

Q1174 2SC2412KT96R

BIAS OSC CONT.

((0V)) ((4.8V)):CrO2

C1184 1500P

24.9V ((0.1V))

Q1173 DTC144TKA146

BIAS OSC CONT.(CrO2)

0.1V ((0V))

Q1179 2SC2412KT96R

SWITCHING (BEAT PROOF)

C1173 0.01

C1182 50V4.7

D1171 MA111TX

R1183 100K

SCHEMATIC DIAGRAM-4
:POSITIVE VOLTAGE LINE :RECORDING SIGNAL LINE :TAPE PLAYBACK SIGNAL LINE

Q1107 DTC144TKA146

P.B EQ/REC EQ (CrO2/H.SPEED) ((0V))

((0V)):CrO2 ((0V))

R1121 33K

R1123 10K

C1133 50V4.7

C1117 50V1

R1107 C6.3V220

C1123 1800P

C1143 50V4.7

C1109 16V100

C1105 1200P

C1108 16V33

C1111 820P

C1147 1500P

C1129 820P

R1125 1K

C1131 820P

C1135 1000P

C1146 16V10 R1146 10K

R1111 2.2K

R1115 390K C1119 50V4.7 C1121 50V1 C1127 0.01 R1117 270K
C1115 R1109 0.033 4.3K R1141 6.8K

C1125 0.047

R1131 68K C1139 50V2.2 GND B C SW A TPS 50V0.1 470K R1134 16V10 C1140 C1136 1000P R1132 C1141 C1142 0.022 R1133 3.3K 3.3M

R1105 270

4.8V 4.8V 5.0V 9.1V 4.5V 4.5V 4.6V 4.7V 8.8V 4.9V 9.3V ((0V)) ((9.4V)) ((9.9V)) ((0V)) ((1.1V)) ((4.8V)) ((4.8V)) ((5.1V))((5.1V)) ((5.4V)) ((4.9V)) ((5.2V)) ((5V)) ((0V)) ((4.3V)) ((0V)) ((9.7V)) ((0V)) Vcc B A A REC

IC1101 M51167AFP-TB

P.B EQ/REC AMP/ ALC/TPS AMP

ALC C PB PRE

1 ((0V))

C1106 1200P

C1112 820P
REC AGC B R/P OFF ((4.7V)) ((0V)) ((1.1V)) ((4.8V)) ((4.8V)) ((5.1V)) ((5.1V))((5.4V)) ((4.9V)) ((5.2V)) ((5.0V)) ((0V)) ((0V)) ((0V)) ((4.1V)) ((5.1V)) 4.4V 4.5V 4.8V 4.8V 5.0V 4.6V 4.9V 4.9V 4.8V 3.8V C1126 0.047 C1128 R1118 0.01 270K C1116 0.033 C1114 R1108 6.3VR1142 6.8K C1122 50V1 R1110 4.3K C1120 50V4.7 R1112 2.2K C1124 1800P R1116 390K C1130 820P C1144 50V4.7 C1132 820P

R1167 47

Q1118-1121 2SC2412KT96R

((0.7V))

D951 MA165TA

IC971 0N2180RLC

PHOTO INTERRUPTER R972 820

6 50K 7

PHOTO INTERRUPTER
C MECHANISM (DECK2) CIRCUIT
D MECHANISM (DECK1) CIRCUIT

R952 820

IC951 0N2180RLC

R953 39K

((5V))

C1186 10V47

C1152 16V10

R1186 1K

SCHEMATIC DIAGRAM-6
Z1101 25K 50K 50K 25K 50K 25K 50K 50K A 10V

B C D E F

R1144 R1143

10K 10K

H1100 M.GND MO.GND +B(5) To D.GND +B(3) Rch IN Lch IN A.GND Rch OUT Lch OUT

E MAIN

(DSC) CIRCUIT (CN304) on SCHEMATIC DIAGRAM-9
A B C D E F R1233 2.2K R1216 R1215 5V R1234 4.7K C1188 100P C1187 100P

2.2K 2.2K

R1235 4.7K
CN1201 VREF(+) ADIN7 To ADIN6 TPS D.GND MKCLK MKDATA +B(6)
CIRCUIT (H600) on SCHEMATIC DIAGRAM-13
5.1V ((0.2V)) 8 DMT 7 BPDOLBY 5 HI SP 4
((4.7V)) ((0V)) ((0V)) 1 DATA GND CLK

IC1105 BU2090AF-E2

SYSTEM CONTROL

Q1218 DTA114EKA146

SWITCHING (REC:ON)

R1230 4.7K

16 ((0V)) ((4.8V)) ((0.5V)) ((0V)) ((0V)) ((4.6V)) ((5V)) 4.7V 0.2V 0V 4.5V C1202 0.1

D ((5V))

((4.9V))

Q1220 DTA143XKA146

MOTOR DRIVE

R1106 2.2K

((4.8V)) 0.2V

R1232 1K

R1236 4.7K

SCHEMATIC DIAGRAM-7

E MAIN(TUNER) CIRCUIT O FM FRONT END CIRCUIT

Q1A 2SK544F-AC

RF AMP C1A 5.6P D1A SVC211SPA-AL JK101 L12 R2 100K G D S L11 D2A SVC211SPA-AL
:FM SIGNAL LINE :FM OSC SIGNAL LINE
:AM SIGNAL LINE :AM OSC SIGNAL LINE

Q2 2SC2786MTA

C3 2.2P L1 1.2 H FM MIXER

L2 0.47 H 7

C2A 1000P

75 GND

C4 180P

C11 1000P

R5 560K

FM ANT

R6 390

R1A 100K

R6 RR4 100K C7 4.7P R8 680K C102 16V100 RC101 0.01

R103 270

R11 680K C8 3.3P

C10 18P

R7 2.7K

D3 SVC211SPA-AL

C9 2.2P

Q3 2SC2787FL1TA

LOCAL OSC

Q4 2SC2787FL1TA

BUFFER AMP 8

L102 0.39 H

AM ANT EXT

Z101 A Ca

C A R110 1K AM ANT AM OSC R151 82

C107 0.047

Q511,514,517,518 KTC3199GRTA
H.P.F./L.P.F. R545 18K C520 1800P R548 18K C518 50V1 B
14.8V 8.8V C524 1800P R573 100K
CP501 GND1 +B(3) H.Lch IN H.Rch IN To E MAIN (DSC) LOW Rch IN CIRCUIT(CN300) GND12
D515 RVD1SS133TA R564 10K C542 50V1 F C532 47P R591 6.8K

on SCHEMATIC DIAGRAM-11

C545 100V10

Q521 KRA102MTA

POWER SUPPLY
LOW Lch IN /CD DC DET P.CONT HP SW

0.2V A

C551 50V1 R500 47K

C582 0.01 R592 10K

R595 82K

A B C D

Q510 2SD2144STA

SWITCHING R554 10K 0V

C580 1800P R530 20K

C581 1800P

CP500 P.GND D.GND +B(4) -B(1) FAN1 FAN2 +B(1) +B(2) +B(6) -VP LED9V 11 +B(5) 12
To E MAIN (DSC) CIRCUIT(CN301) on SCHEMATIC DIAGRAM-11

D501 1D3E

D502 RL1N4003S-P

D503 RL1N4003S-P

14.8V 14.5V 7.7V -7.9V 3.3V 5V -31V 10V

SCHEMATIC DIAGRAM-17

:FRONT LOW SP DRIVE SIGNAL LINE :FRONT HIGHT SP DRIVE SIGNAL LINE

IC501 STK470-040

REGULATOR E JK501
A 14.5V 9.8V R527 1.5K D507 MTZJ10BTA 10.4V 5.1V 15 -27.8V -8.5V -7.9V 7.7V 14.8V 16.0V 28.0V 60V 29.2V 0V C544 0.01 R609 1.5K 50V47 C552 0.01 R601A 4.7K 16 0V -29.7V -60.7V D 0.1 0.1 0.1

MID Lch

A C534 16V47

MTZJ16BTA

R590 1.5K RC575 25V100

R599 4.7K

C553 35V100

C570 C568 C566

0.1 C569 0.1 C567 0.1 C565

C583 0.18

D526 C574

1D3E 35V4700 F

R588 R587 R586

D524 C571

1D3E 35V4700

SPEAKERS (6 )

E 5V 0V F
Q508 Q502 KTC3199GRTA KTC3199GRTA
SWITCHING 0V C525 6.3V100 RR528 220K D506 FAN MOTOR DRIVE RR515 0V 56K 1D3E 1D3E C 0.1 0.1 0.1 B

Rch MID

Q500 2SB621ARSTA

POWER SUPPLY R539 56K

10V R517 4.7K 0V R572 2.2 10V R518 820K C515 0.1

REGULATOR 14.9V 60V

R519 0V 5.6K

R593 820K

D528 D522 MTZJ15CTA

R574 2.7K

R547 820K

Q507 KTC3199GRTA

POWER SUPPLY CONT.

C549 100V10

R567 100K

D528 RVD1SS133TA

Q501 2SB621ARSTA
REGULATOR -31V -38.2V C516 0.01 R529 4.7 R524 4.7K C543 63V100 D514 1D3E D516 1D3E

C572 35V5600

/TLOCK /FLOCK

A/D CONVERTER

RFENV SMCK FCLK CSEL

INPUT PORT

TRCRS VDET

SERVO TIMING GENERATOR
/RFDET SENSE WVEL LDON /RST OFT

/RFDET

18 (To MAIN SECTION) /RST

X701 (16.9344MHZ)

MAIN SECTION
FM ANT Q1A,D1A 1 (FM FRONT END) Q2 FM MIXER Q3,DLOCAL OSC 6 +B(FM) Q4 BUFFER AMP 8 CF202 FM IF Q101 AMP 7 CF201 AM ANT COIL AM ANT Z101 AM OSC COIL

RF AMP

+B4 Rch
LA1833NMNTLM IC101 FM / AM I F AMP, DET / AM OSC, MIX / FM MPX

AM RF IN

AM OUT

DET OUT

PILOT IN

MPX IN

PILOT OUT

DECODER

OSC OUT

ALC BUFF.

AM OSC

AM MIX

AM RF AMP
AGC PHASE DET. STEREO SWITCH PILOT CANCEL

LEVEL DET. 1

FM IF IN
AM IF AM/FM IF BUFFER TUNING DRIVE

AM IF IN

AM DET.

S-CURVE FM DET.

FMDET AM MIX OUT
COMP. VCO FF FF FF PILOT DET.

9 +B4 X102 (10.6MHz)

Z102 AM IFT

AIN PD

PHASE DETECTOR CHARGE PUMP

REFERENCE DIVIDER

SWALLOW COUNTER 1/6,1/17 4BIT
LC72131MDTRM IC102 PLL FREQUENCY SYNTHESIZER
UNIVERSAL COUNTER POWER ON RESET
12 BIT PROGRAMMABLE DIVIDER
+B4 +B(FM) Q106 +B3 POWER SUPPLY (FM:ON)
DATA SHIFT REGISTER LATCH

CL D0 AM

PLLCE PLLDA PLLCK DO/ST
[ DECK 1 ] PLAYBACK HEAD (L ch) [ DECK 2 ] R/P HEAD (L ch)
TP3( TP4 ) Q1103 (Q1104) HEAD SELECT (PLAY:ON) Q1101(Q1102) HEAD SELECT (REC:ON)
M51167AFP-TB IC1101(1/2) P.B. EQ / TPS AMP

36(1) 33(4) 32(5) 31(6)

Q1153(Q1154) 34 30(7) 18 TPS Q1115 (Q1116) +B4 MUTING +B4 +B4 BUFFER AMP

TP9( TP10 )

CR NETWORK TP5 Q1218 SWITCHING (REC:ON) +B6
M51167AFP-TB IC1101(1/2) REC AMP / ALC

27(10) 26(11) 28(9)

BA7755A IC1102 R/P SELECT

24 (13) 29(8) 14 SW ALC

Q1151 (Q1152) SWITCHING (PLAY:ON)

AGC OFF

25(12) Q1107 (Q1108)
REC EQ (CrO2/H.SPEED) [ DECK1 ] S953 (ATS/CrO2)

[ DECK 2 ] ERASE HEAD

TP11 TP12 Q1179 SWITCHING (BEAT PROOF)
Q1173~1176 SWITCHING (REC:ON) Q1171 Z971 +B6

S972 (HALF)

[ DECK1 ] 0N2180RLC IC951
[ DECK2 ] 0N2180RLC IC971

S971 (MODE)

BIAS OSC CONTROL

FL segment signal output

Power supply (+5V) FL segment signal output
Region select signal input Not used, open Not used, open Power supply (-30V) GND Reference voltage input
SPE V JOG A/B 15 J JOG A/B 16 CHG ADCHG AD37 CDRST STATUS SQCLK SD ST/DO/ SUBQ CHG CW CHG CCW CHG HALF MLD/ PLLCE MDATA/ PLLDA MCLK/ PLLCLK REST SW BLKCK RMT DCDET ECONO SYNC /RESET XCIN XCOUT
20.2. IC701 (AN8839NSBE2): Servo Amp
Pin No. Terminal Name PDE PDF Vcc PDA PDB LPD LD RF RFIN CSBRT CEA BDO LDON GND /RFDET PDOWN OFTR NC ENV NC TEN TEOUT FEOUT FEN VREF TBAL FBAL I/O I I I I I I O O I I I O I O O O I O O I O I I Function Tracking signal input terminal 1 (E ch) Tracking signal input terminal 2 (F ch) Power supply terminal Focus signal input terminal 1 (A ch) Focus signal input terminal 2 (B ch) Laser PD signal Laser power auto control output RF amp terminal AGC input terminal OFTR capacitor connection terminal HPF-AMP capacitor connection terminal Dropout detection control LD APC ON/OFF (H: ON) GND terminal RF detect signal output (L: detect) Power down terminal Off track detection (H: detect) Not used, open Envelope signal output Not used, open Tracking error signal input Tracking error signal output Focus error signal output Focus error signal input Reference voltage output Tracking balance adj. input Focus balance adj. input
38 XIN 39 XOUT 40 VSS 41 MBPMBPCHG SWCHG SWCHG PLGR 46 SPA 47 SPB 48 SPC
20.3. IC702 (MN662790RSC): Servo Processor/Digital Signal Processor/Digital Filter/ D/A converter
Pin No. Terminal Name BCLK LRCK SRDATA DVDD1 I/O I Function Serial bit clock output (Not used, open) L/R discriminating signal output (Not used, open) Serial data signal output (Not used, open) Power supply terminal

Pin No. 59

Terminal Name DVSS1 TX MCLK MDATA MLD SENSE /FLOCK /TLOCK BLKCK SQCK SUBQ DMUTE STAT /RST SMCK CSEL TRV TVD PC ECM ECS KICK TRD FOD VREF FBAL TBAL FE TE RFENV VDET OFT TRCRS /RFDET BDO LDON PLLF2 DSLF2 WVEL ARF IREF DRF DSLF PLLF VCOF AVDD2 AVSS2 EFM PCK VCOF2 SUBC SBCK VSS X1 IN X2 OUT
I/O O I I I O I O O I I O O O O O O I O O I I I I I I I I O I/O I I I I/O I/O I I O
Function GND terminal Digital audio interface signal output Command clock signal input Command data signal input Command load signal input Sense signal (Not used, open) Optical servo condition (focus) (Not used, open) Optical servo condition (tracking) (Not used, open) Sub-code block clock signal output (f=75 Hz) Sub-code Q resistor clock signal input Sub-code Q data signal output Muting input (Not used, connected to GND) Status signal output Reset signal input (L: reset) System clock (f=4.2336 MHz) (Not used, open) Frequency control terminal of crystal oscillator (Connected to VDD) Traverse servo control signal output (Not used, open) Traverse drive signal output Turntable motor drive signal output (L: ON) Turntable motor drive signal output (Forced mode) Turntable motor drive signal output (Servo error signal) Kick pulse output (Not used, open) Tracking drive signal output Focus drive signal output D/A drive output normal voltage input Focus balance adj. output Tracking balance adj. output Focus error signal input Tracking error signal input RF envelope signal input Oscillator detect signal input (H: detect) Off track signal input (H: Off track) Track cross signal input RF detect signal input (L: detect) Dropout detection signal input (H: dropout) Laser power control signal output (H: ON) PLL loop filter terminal (Not used, open) DSL loop filter terminal Double velocity status signal output (Not used, open) RF signal input Reference current input DSL bias terminal DSL loop filter terminal PLL loop filter terminal VCO loop filter terminal (Not used, connected to GND) Power supply terminal GND terminal EFM signal (Not used, open) PLL extract clock (Not used, open) VCO loop filter terminal (Not used, connected to GND) Sub-code serial output clock (Not used, open) Sub-code serial input data (Not used, connected to GND) GND terminal Crystal oscillator terminal (f=16.9344 MHz)

Pin No. 76

Terminal Name VDD BYTCK /CLDCK FCLK IPFLAG FLAG CLVS CRC DEMPH RESY IOSEL /TEST AVDD1 OUTL AVSS1 OUTR RSEL

I/O I I I I O O I

Function Power supply terminal Byte clock signal (Not used, open) Sub-code frame clock signal (Not used, open) Crystal frame clock (Not used, open) Interpolation flag terminal (Not used, open) Flag terminal (Not used, open) Turntable servo phase synchro signal (Not used, open) Sub-code CRC check terminal (Not used, open) De-emphasis ON signal (Not used, open) Re-synchronizing signal of frame sync. (Not used, open) I/O select signal input (Connected to VDD) Test terminal (Not used, connected to power supply) Power supply terminal L ch audio signal output GND terminal R ch audio signal output Polarity direction control terminal of RF signal (Not used, connected to power supply) Power supply terminal Test terminal (Connected to GND) Output frequency select signal input (Not used, connected to GND) SUBQ output mode select signal input (Not used, connected to VDD)

IOVDD PSEL MSEL SSEL

20.4. IC703 (AN8739SBE2): Focus Coil/Tracking Coil/ Traverse Motor/Spindle Motor Drive
Pin No. Terminal Name /RST NC IN2 PC2 NC IN1 PVCC1 PGND1 NC D1D1+ D2D2+ D3D3+ D4D4+ NC PGND2 PVCC2 VCC VREF IN4 IN3 RSTIN NC I/O I I I I O O O O O O O O I I I I I I Function Not used, open Not used Motor driver 2 input Turntable motor drive signal input (L: ON) Not used Motor driver 1 input Driver power supply terminal 1 Driver GND terminal 1 Not used, connected to GND Motor driver 1 output terminal (-) Motor driver 1 output terminal (+) Motor driver 2 output terminal (-) Motor driver 2 output terminal (+) Motor driver 3 output terminal (-) Motor driver 3 output terminal (+) Motor driver 4 output terminal (-) Motor driver 4 output terminal (+) Not used Driver GND terminal 2 Driver power supply terminal 2 Power supply terminal Reference voltage input terminal Motor driver 4 input Motor driver 3 input Reset terminal (Not used, connected to GND) Not used, connected to GND

2 Schematic Diagram

3 Cabinet Parts Location

4 Replacement Parts List

Notes : Important safety notice : mark Components identified by characteristics important for safety. have special
Furthermore, special parts which have purposes of fireretardant (resistors), high-quality sound (capacitors), low noise (resistors), etc are used. When replacing any of these components, be sure to use only manufacturers specified parts shown in the parts list. [M] indicates in the Remarks columns indicates parts supplied by MESA.
Ref. No. Part No. Part Name & Description CABINET AND CHASSIS SP CABINET ASSY(L) SP CABINET ASSY(R) Remarks

BKM0146 BKM0145

[M] [M]
Ref. No. Part No. 1-1 RGQ0230-K 1-2 RMQ0941 1-3 RKA0072-KJ 1-4 RMQRYQ0296-S 2 RYQ0296A-S 3 RMR1278-W 4 RMR1277-K 5 RMQ0936S 6 REERMR1281A-H 7 RMR1281-H 8 RMG0513-K 10 RMQRMG0490-K 12 RYBRGN1849-K 14 XTB4+10G 15 XTB4+14G 16 XTB4+20AFN 17 RHD40009-S 18 XTB4+8GFZ
Part Name & Description CORD CLIPPER BUSH TERMINAL LEG PORT PACKING FRONT PANEL (L) FRONT PANEL (R) WOOFER RING BACK CAVITY EVA PACKING (B/C) CORD ASSY EXTEND PORT R EXTEND PORT L CATCHER EVA PACKING (S/W) CATCHER NET FRAME ASSY BACK LEBAL SCREW (B/C) SCREW (F/P) SCREW (SUPER WOOFER) SCREW (FRONT PANEL) SCREW (TWEETER)
Remarks [M] [M] [M] [M] [M] [M] [M] [M] [M] [M] [M] [M] [M] [M] [M] [M] [M] [M] [M] [M] [M] [M]
Ref. No. Part No. 19 XTB3+10G 20 RGK0985B-H 21 RKA0072-KJ 22 RGQ0260-S 23 RYQ0297-H 23 RYQ0297A-H 24 RGK0500-K 25 RMR1208-K 26 REERMQ0931C 28 RMQ0931LK
Part Name & Description SCREW (EXTEND PORT) ORNAMENT CAP LEG PANEL SPACER ORNAMENT ASSY (L) ORNAMENT ASSY (R) DUST CAP TWEETER SPACER WIRE CAB PACKING CABINET PACKING CAPACITORS
Remarks [M] [M] [M] [M] [M] [M] [M] [M] [M] [M] [M]
ECEA1HAY4R7S 4.7uF 50V PACKING MATERIALS

RPH0187 RPN1250

MIRAMAT POLYFOAM SPEAKER

SP1 SP2 SP3 SP4

EAST17PL11B6 EAST12P25A6 EAST6PH06A6 EFBS55C41A6
SUPER WOOFER WOOFER TWEETER SUPER TWEETER

[M] [M] [M] [M]

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