15 NSP 24 25

U- COM ASSY DECK ASSY AF ASSY R- TERMINAL ASSY FM/AM TUNER MODULE Deck Shield DECK MECHANISM UNIT Chassis M Rear Panel Shield Plate Shield Case T Shield Case B PC Support Spacer Rubber Sheet Leg Assy IS Locking Card Spacer PCB Spacer (3 x 6) Screw Screw Connector Assy 3p 23P F.F.C /30V TX CONNECT ASSY
AWU7327 AWU7334 AWU7298 AWU7315 AXQ7065 AEC7209 AXA7075 ANA7087 ANC7735 ANK7059 ANK7050 ANK7051

NSP NSP

DEC1932 AEB7092 AEB1111 AEC7202 VEC1596 AEC7156 BBZ30P080FMC VPZ30P080FZK ADX7252 ADD7150 AWU7323
2.4 FRONT PANEL ASSY (1/2)
FRONT PANEL ASSY (1/2) PARTS LIST

NSP NSP NSP NSP 33 34

FRONT PANEL ASSY CD CLOSE SW ASSY CD OPEN SW ASSY F- TERMINAL ASSY LCD ASSY (TC) LIGHT- L ASSY Lens Holder M Lens M Diffusion Sheet Reflector 15P F.F.C/ 30V 29P F.F.C/ 30V Frame Rail Blind PCB Holder L PCB Holder R Plating Button Assy Fuction Button B Window Complex Button Plating Button A Function Button A O/C Button Key O/C Connector 3p Screw Screw Screw 17P F.F.C/ 30V Front Panel M PU Caution Label Spacer Screw
AWU7308 AWU7320 AWU7319 AWU7311 AWU7354 AWU7321 AMR7247 AAK7615 AAK7666 AMR7248 ADD7147 ADD7148 ANG7235 AMR7239 AMR7261 AMR7262 AMR7263 AXG7089 AAD7511 AAK7621 AAD7509 AAD7567 AAD7510 AAD7506 AAD7526 ADX7252 IPZ30P100FMC ABA1005 VPZ30P080FZK ADD7145 AMB7565 ARW7059 AEC7216 VPZ30P100FMC
2.5 FRONT PANEL ASSY (2/2)
Note 1 Cutting Position (No.13 (Mecha Holder) No.13 (1/2)
Refer to "2.6 CD MECHANISM ASSY" 11

Note 1

13 (1/2)

No.13 (2/2) Cutting

13 (2/2) 19 22
FRONT PANEL ASSY (2/2) PARTS LIST
CD MOTOR ASSY CD ASSY Slider Motor Motor Shield Motor Pulley Gear Holder Gear A Gear B Gear Pulley A Belt CD MECHANISM ASSY Float Spring Mechanism Holder CD Door Window CD Door Escutcheon CD Door Shaft Assy Shaft Holder Cussion Rubber Screw Screw Screw Screw Screw Float Rubber 17P F.F.C/ 30V Screw
AWU7318 AWU7305 VXM1033 ANK7067 PNW1634 AMR7240 ANW7063 AMR7260 ANW7066 AEB7171 KSM-620AAA ABH7170 AMR7242 AAK7618 AAK7619 AAN7189 AXG7078 AMR7237 AEB7154 BBZ30P080FMC VPZ30P080FZK ABA7054 PMZ26P040FMC IPZ20P080FMC AEB7129 ADD7146 VPZ30P100FMC
XC-IS21T 2.6 CD MECHANISM ASSY
CD MECHANISM ASSY PARTS LIST
KSS-620A(RP) Sled Screw Assy Sled Motor Assy MD Assy Geer BN Rack Spring Holder Tapping Screw Precision Screw Tapping Screw
8-820-063-(03) X-2646-389-(1) A-4912-199-(A) X-2646-482-(1) 2-627-751-(02) 2-646-912-(01) 2-646-913-(01) 2-646-352-01 2-627-668-01 2-646-358-11
XC-IS21T 2.7 DECK MECHANISM UNIT (1/2)
Refer to "2.8 DECK MECHANISM UNIT (2/2)".
DECK MECHANISM UNIT (1/2) PARTS LIST
Screw Screw Front BKT Washer SP Return Plate Hold BLK Holder CST BLK LDG Base Pulley LDG Gear
FG114-14 UG12H-15 FC64K-11 MJ112-22 FK34N-11 F573-258 F527-078 FD56R-12 FD56T-11 FD56U-11
Slider LDG Belt Switch MTR Reel BLK Screw SP Clamper Switch

FD57E-11 FF19L-12 UE15S-14 F564-313
UG12H-28 FK34M-11 UE18P-21
2.8 DECK MECHANISM UNIT (2/2)
DECK MECHANISM UNIT (2/2) PARTS
Screw Reel Feather Screw SP Reel(L) SP Brake SP Arm Play SP Reel(R) Spring Cassette BKT MTR Reel Base Cam Gear Play Gear (A) Arm Play Plate Slide PCB Control BLK Chassis base BLK Head Base Roller Pinch BLK R Roller Pinch BLK L Assy F/W Clutch Assy BLK Clutch Assy BLK Washer F/R Pulley Solenoid BLK F/R Belt Belt Main Plate HD BLK MTR MAIN BLK Washer Washer Washer Lever Brake FF Gear(A) Cam SP Screw Lever F/R Plunger Mecha-Cable Spring HB Screw Washer Spacer
KG194-36 FD57D-13 UG11S-14 FK32U-12 FK33B-13 FK33P-11 FK32V-12 FC65M-11 FC64M-12 FD52W-12 FD52Y-23 FD53K-12 FD53D-19 FC61L-19 F567-617 F612-231 FC61K-32 F514-129 F514-130 FR24S-21 F522-037 F522-048 FJ111-13 FD53F-15 F765-279 FF18W-12 FF19H-11 F513-824 F525-321 FJ111-30 FJ111-35 UJ16F-11 FD53P-17 FD53L-12 FK32S-14 UJ14A-12 FC62G-14 FL41S-21 WH65N-11 FK32T- 31 UG15V-13 MJ112- 22 UJ15V- 13
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM

3.1 BLOCK DIAGRAM

MECHA ASSY

REC/PB HEAD

DECK ASSY

CN2301

Q2301 IC2301 (2SK373) (NJM4558M)

D G S PB 3+ 21 +

(PB) 3

IC2401 (BA4558MD)

+ 2 + (REC) + 8
IC2201 (HA1236AF) DOLBY NR
6 REC OUT 1 REC IN L L2201 MPX

PB IN L

VR2301 (PB LEVEL)

REC L (REC)

ERASE HEAD

CN2302

VR2401 (REC LEVEL)

+ LINE OUT L (PB) V+12M

VR2801 (BIAS)

PB L (PB)

LBIAS OSC
Q2801 (2SC1815) Q2802 (2SC1815)

CD MECHA ASSY

V+5CDM TFDR (TS) TRDR (TS) FFDR (FS) FRDR (FS)

CD ASSY

PICKUP ASSY (2/2)

CN1101

T+ FF+ T-

V+5CDM

(FS) (FS) (TS) (TS)

SL/SP MOTOR

IC1301 BA5970FP

(SM) (SM) (CS) (CS)

V+5CD V+5CD GNDCDM

CN1301 SL

SL + SL SP + SP V+5CD TFDR TRDR FFDR FRDR
(SM) (CM) (CM) (TS) (TS) (FS) (FS)

GNDCDM

(LO) (REC)

: LINE OUT SIGNAL : RECORDING SIGNAL

C CN105

VTL1105

(LO1) 0 VTL1105 (LO2)

(L2) (LO)

S5688G S5688G

XC-IS21T 3.6 CD and CD MOTOR ASSYS

(AWU7305)

(CM) (CM) (TS) (TS) (FS) (FS)
Note: The encircled numbers denote measuring point in the schematic diagram.
IC1101- Pin 16: PLAY MODE (RF)

H : 500nsec/div 1.0Vp-p

2 IC1101- Pin 13 : TEST MODE,

Tracking Open (TRER)

H : 5msec/div

1.0Vp-p VC

VC : IC1101- Pin12

CN1301 To. CD MECHA

(LM) (LM)

(SM) (SM)

(TS) (FS) (FS) (TS)

To. P.U Assy

2 VC D
SIGNAL ROUTE : CD AUDIO SIGNAL ROUTE
: SPINDLE MOTOR ROUTE : CARRIAGE MOTOR ROUTE : LOADING MOTOR ROUTE
: FOCUS SERVO LOOP LINE : TRACKING SERVO LOOP LINE
G CD MOTOR ASSY (AWU7318) CN11
XC-IS21T 3.7 R-TERMINAL and F-TERMINAL ASSYS
TO. STEREO POWER AMPLIFIER (M-IS21)

(AWU7315)

VTL1096 VTL1096

(L1) (L1)

: MAIN OUT SIGNAL

CN7102

VTL1096

To. OPTION DECK

: LINE OUT1 SIGNAL

(AWU7311)

: LINE2 SIGNAL

: LINE OUT2 SIGNA

XC-IS21T 3.8 DECK ASSY

(PB) (PB)

(REC) (REC)

: PB SIGNAL

(PB) (REC)

CN2701

CN2603
XC-IS21T 3.9 FRONT PANEL, LIGHT-L, CD OPEN SW and CD CLOSE SW ASSYS
SLR-343VC(NPQ)-TS DTC124EK-TLB DTA143EK-TLB

DTC124EK-TLB

FRONT PANEL ASSY (SW name) S5901: POWER (STANDBY/ON) S5902: DISPLAY/RDS S5903: TIMER REC/WAKE UP S5904: TAPE/OPEN/CLOSE S5905: TAPE S5906: LINE1, 2 S5907: /TUNING+ S5908: REC/STOP S5909: TREBLE S5910: PLAY/PAUSE S5911: ST.WIDE S5912: BASS S5913: STOP S5914: BALANCE S5915: TUNER S5916: VOLUME/JOG S5917: /TUNINGS5918: BALANCE S5919: CD S5920: STATION MEMORY S5921: FREQ/STATION S5922: REVERSE S5923: DOLBY NR ON/OFF

(AWU7319)

(AWU7320)
4. PCB CONNECTION DIAGRAM

NOTE FOR PCB DIAGRAMS :

1. Part numbers in PCB diagrams match those in the schematic diagrams. 2. A comparison between the main parts of PCB and schematic diagrams is shown below.
Symbol In PCB Diagrams Symbol In Schematic Diagrams B C E B C E Part Name
3. The parts mounted on this PCB include all necessary parts for several destinations. For further information for respective destinations, be sure to check with the schematic diagram. 4. View point of PCB diagrams.

Connector

Transistor

Capacitor

B C E B B C E D D G S G S D G S C E B C E

SIDE A

Transistor with resistor

Field effect transistor

P.C.Board

Chip Part

SIDE B

Resistor array

3-terminal regulator
XC-IS21T 4.1 FM/AM TUNER MODULE and TX CONNECT ASSY

(ANP7302-B)

VR6201 Q6204 Q6203
(ANP7159-B) IC6201 Q6201 Q6202 IC6202 Q6301 Q6303 Q6302 Q6403 Q6214 Q6404 Q6402 Q6205 Q6401 Q6304 Q6306
XC-IS21T 4.2 U-COM and LCD ASSYS

(ANP7301-B)

(ANP7302-B) IC5501 IC5503 Q5501 Q5503 Q5502 IC5502 Q5731 Q5752 Q5701 Q5511 Q5512 Q5702
XC-IS21T 4.3 AF, F-TERMINAL and R-TERMINAL ASSYS

IC4001

CD TOUCH SW
(ANP7301-B) IC7301 IC3002 Q3005 Q3006 Q3004 Q3011 Q3009 Q3001 Q3002 Q3003 Q3013 Q3010 Q3015 Q3014
XC-IS21T 4.4 CD and CD MOTOR ASSYS

CD MECHA

Q7005- Q7008

Q1401 Q1202 IC1301

Q1403 Q1404 Q1402 IC1201

Q7004 Q7002 Q7003 Q7001

XC-IS21T 4.5 DECK ASSY

DECK MECHA

Q2702 Q2701 Q2704 Q2703 VR2701

Q2805 Q2801 Q2802

Q2803 Q2806 VR2801 VR2802

Q2301 Q2802 VR2401

VR2302 VR2402
Q2305 IC2301 Q2303 Q2306 Q2304 Q2401 Q2402 Q2452 Q2451 IC2401
(ANP7302-B) IC2201 Q2351 Q2254 Q2253 Q2251 IC2202 Q2262 Q2201 Q2252 Q2602 Q2603 Q2707 Q2709 Q2711 Q2710 Q2261 Q2263 IC2601 Q2705 Q2706
XC-IS21T 4.6 FRONT PANEL, LIGHT-L, CD CLOSE SW and CD OPEN SW ASSYS

K L M N

Q5902 Q5901

5. PCB PARTS LIST

Parts marked by "NSP" are generally unavailable because they are not in our Master Spare Parts List. The mark found on some component parts indicates the importance of the safety factor of the part. Therefore, when replacing, be sure to use parts of identical designation. When ordering resistors, first convert resistance values into code form as shown in the following examples.
Ex.1 When there are 2 effective digits (any digit apart from 0), such as 560 ohm and 47k ohm (tolerance is shown by J=5%, and K=10%). 561... RD1/4PU 1 J 560 473... RD1/4PU 3 J 47k 0.5 R50... RN2H R K 1 1R0... RS1P 1 R 0 K Ex.2 When there are 3 effective digits (such as in high precision metal film resistors). 5621.. RN1/4PC F 5.62k

LIST OF ASSEMBLIES

FM/AM TUNER MODULE NSP COMPLEX ASSY AF ASSY CD ASSY FRONT PANEL ASSY F-TERMINAL ASSY R-TERMINAL ASSY CD MOTOR ASSY CD OPEN SW ASSY CD CLOSE SW ASSY LIGHT-L ASSY LCD ASSY DECK-COMP ASSY TX CONNECT ASSY U-COM ASSY DECK ASSY AXQ7065 AWM7433 AWU7298 AWU7305 AWU7308 AWU7311 AWU7315 AWU7318 AWU7319 AWU7320 AWU7321 AWU7354 AWM7441 AWU7323 AWU7327 AWU7334

C7202 C7213, C7214, C7223, C7224 C7201, C7203 C7231 CEJA101M10 CKSQYB102K50 CKSQYB103K50 CKSQYB472K50 RS1/10S&&& J

Other Resistors

R7003 R7007 R7006 R7005 Other Resistors RD1/4PU181J RD1/4PU221J RD1/4PU331J RD1/4PU470J RS1/10S&&& J
7303 J103 JA7201 (9P CABLE HOLDER) (MINE JACK) (MINI JACK) (JUMPER WIRE) (OPTICAL LINK OUT) 51063-0905 AKN-210 AKN7003 D15A09-350-2651 GP1F32T
CN110 CN1101 J111 (3P CABLE HOLDER) (12P CABLE HOLDER) (17P FFC CONNECTOR) (16P FFC CONNECTOR) (3P FLAT CABLE) 51048-0300 51048-1200 52044-1745 52089-1620 D20PYY0310E D20PYY1215E S6B-ZR VEF1040 PSS1008

H R-TERMINAL ASSY

L7101L7106, L7111 VTL1096
J101 (12P FLAT CABLE) CN1301 (6P CONNECTOR) 1001, 1002 (PCB BINDER) X1201 (16.9344MHz)
C7102, C7104 C7154 C7131 CCSQCH221J50 CKSQYB102K50 CKSQYB103K50

K FRONT PANEL ASSY

Q5901 Q5902, Q5903 D5902, D5903 D5908 D5901 D5907 DTA143EK DTC124EK 1SS133 1SS355 MTZJ5.6B SLR-343VC ASX7026 XSG3001
Other Resistors RS1/10S&&& J
JA7105 CN7104 CN7102 CN7101 CN131 CN132 (2P PIN JACK) (4P PIN JACK) (5P SOCKET) (10P SOCKET) (10P SOCKET) (12P SOCKET) AKB7043 AKB7114 AKP7042 AKP7048 KP200IB10L KP200IB12L

SWITCHES AND RELAYS

S5916 S5901S5915, S5917S5923

G CD MOTOR ASSY

C7501 CKSQYF104Z50
C5902 C5903 CEJA101M10 CKSQYF103Z50
R5917 R5909 Other Resistors RD1/2PM471J RD1/2PM820J RS1/10S&&& J
CN11 (3P JUMPER CONNECTOR) 52151-0310

M CD OPEN SW ASSY

S7401, S7402 VSH1019
154, 155 CN150 CN51 J54 J(3P CABLE HOLDER) (17P FFC CONNECTOR) (3P JUMPER CONNECTOR) (3P FLAT CABLE) (3P FLAT CABLE) (REMOTE RECEIVER UNIT) 51048-0300 52044-1745 52147-0310 D20PYY0310E D20PYY0330E GP1U27X
54 (3P CABLE HOLDER) 51048-0300
Mark No. Description Part No. Mark No. Description Part No.
CKSQYB103K50 CKSQYB104K25 CKSQYF104Z50 CKSQYF104Z50

N CD CLOSE SW ASSY

S7403, S7404 ASG7015
C5528, C5529, C5531, C5545, C5546 C5524C5526 C5504, C5506, C5510, C5511, C5523 C5532, C5535, C5536, C5542
55 (3P CABLE HOLDER) 51048-0300
R5577R5580 Other Resistors RD1/4PU471J RS1/10S&&& J

D5971 NSPBF50S-8451

SEMICONDUCTORS OTHERS
51 J51 (3P CABLE HOLDER) (3P CABLE HOLDER) 51048-0300 D20PYY0310E
60 CN10 CN105 CN90 CN50 X5501 X5502 CN80 CN20 (13P CABLE HOLDER) (17P FFC CONNECTOR) (23P FFC CONNECTOR) (15P FFC CONNECTOR) (17P FFC CONNECTOR) (12MHz) (10MHz) (29P FFC CONNECTOR) (14P JUMPER CONNECTOR) (BUZZER) 51048-1300 52044-1745 52044-2345 52045-1545 52045-1745 ASS1062 DSS1048 52045-2945 52147-1410 APV7002 D20PYY1315E VEF1040 VNF1084

6. ADJUSTMENT

For adjustment, use the stereo power amplifier (M-IS21).

6.1 DECK SECTION

6.1.1 Adjustment Condition
(1) The ground at the time of adjustment shall be W166. (Refer to Fig. 63). (2) Clean the heads and demagnetize them using a head eraser. (3) Set the measurement level to 0 dBV = 1 Vrms. (4) Use the specified tape for adjustment. Use the labeled (A) side of the test tape. NCT111 : For Tape Speed adjustment STD-331E : For Playback adjustment STD632 : Normal blank tape * As the reference recording level is 250 nwb/m for STD 331E, the recording level will be higher by 4 dB for STD 331B (160nwb/m). When adjusting, pay carefull attention to the type of tape used. (5) Provide yourself with the following measuring devides: AC millivoltmeter Low-frequency oscillator Attenuator Oscilloscope (6) Adjust both right and left channels unless otherwise specified. (7) Turn the DOLBY NR switch off unless otherwize specified. (8) Warm up the unit for several minutes before adjustment. In particular, be sure to warm up the unit in the REC/PLAY mode for 3 to 5 minutes before starting recording/playback frequency characteristics adjustment. (9) Always follow the indicated adjustment order. Otherwise, a complete adjustment may not be achieved.

7 List of Adjustments

Playback Section
(1) Tape Speed Confirmation (2) Head Azimuth Adjustment (3) Playback Level Adjustment

Recording Section

(1) Recording Bias Adjustment (2) Recording Level Adjustment

PLAY BACK

250 3dB 10k 3dB 12.5k

RECORDING

12.5k 250 3dB 10k 3dB 5dB
Fig. 6-1 Frequency Characteristics
Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation. DOLBY and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation.

30s 315 Hz

0 dB: 315 Hz, 250 nwb/m 30 s 6.3 kHz 30 s 10 kHz 30 s 315 Hz 10s.... 10s 20 dB 12.5 6.14 kHz kHz 10 kHz 8 kHz kHz 4 kHz 2 kHz 1 kHz Hz 63 Hz 40 Hz Hz Hz 10s
Fig. 6-2 Test Tape STD 331E

6.1.2 Playback Section

(1) Tape Speed Confirmation
No. 1 Mode PLAY Input Signal/Test Tape NCT-111 (3 kHz) Adjustment Points VR2701 (DECK ASSY) (Refer to Fig. 6-3) Measurement Points TP R (C2204) (DECK ASSY) Adjustment Value Remarks FWD adjustment REV Confirmation ( 3000 Hz +60 Hz ) 60

3000 Hz

+10 10
(2) Head Azimuth Adjustment
This unit is equipped with auto tape selector. Do not switch between forward and reverse operation with the screwdriver inserted.
No. Mode Input Signal/Test Tape Adjustment Points Head azimuth adjustment Screw (Refer to Fig. 6-3) Measurement Points TP L (C2203) TP R (C2204) (DECK ASSY) Adjustment Value Max. Playback signal level Remarks After adjustment, apply silicon bond to the head azimuth adjustment screw.

STD-331E test tape (Playback: 10 kHz, 20 dB)
(3) Playback Level Adjustment
Since this adjustment determines playback DolbyNR level, Perform it carefully.
No. Mode Input Signal/Test Tape Adjustment Points L ch R ch Measurement Points TP L (C2203) TP R (C2204) (DECK ASSY) Adjustment Value Remarks
STD-331E test tape (Playback: 315 Hz, 0 dB)

VR2301 VR2302

3.7 dBV

6.1.3 Recording Section

(1) Recording Bias Adjustment
After the adjustment, caution should be exercised so as not to become under bias by checking the distortion rate.
No. Mode REC/ PAUSE REC = PLAY Input Signal/Test Tape Input a 315Hz signal to the LINE IN terminal. Load the STD632 test tape and record/playback the 315Hz and 10kHz signals. (see the Note below) Adjustment Points Measurement Points Adjustment Value Remarks
Input signal level L ch R ch

23.7 dBV

TP L (C2203) TP R (C2204) (DECK ASSY) Repeat adjustment until playback level of the 10kHz signal is within 0.5dBV 0.5dB from that of the 315Hz signal.

VR2801 VR2802

Note: Set the 10kHz input signal level to the same value as the 315Hz input signal level of step 1.
(2) Recording Level Adjustment
No. 1 Mode REC/ PAUSE REC = PLAY Input Signal/Test Tape Input a 315Hz signal to the LINEIN terminal. STD632 test tape and record/ playback the 315Hz signal. Adjustment Points Input signal level L ch R ch Measurement Points Adjustment Value Remarks

7.7 dBV

TP L (C2203) TP R (C2204) (DECK ASSY) Repeat recording, playback and adjustment until playback level of the 315Hz signal becomes 7.7dBV0.5dB.

VR2401 VR2402

C2203 (TP Lch)

VR2301 (Lch)

PB LEVEL C2204 (TP Rch) W166 (TP GND)

VR2302 (Rch)

REC LEVEL

VR2401 (Lch)

TAPE SPEED BIAS

VR2402 (Rch)

VR2701
VR2801 VR2802 (Lch) (Rch)

MECHANISM UNIT

FWD Azimuth Adjustment Screw
REV Azimuth Adjustment Screw
Fig. 6-3 Adjustment and Measurement Points 53

6.2 CD SECTION

TEST MODE : ON

TEST MODE

Note : There is no information to be shown in this CD adjustment.
6.2.1 HOW TO START / CANCEL TEST MODE

Short circuit

W301 W301

Release

TX TEST MODE

CD TEST MODE 2

TEST MODE Short point W302 W301

Fig. 6-4

TEST MODE : STOP CANCEL

STOP All Operations

FUNCTION OF CD TEST MODE

OPEN/CLOSE

CD cover Open / Close

Carriage IN

DISPLAY
Carriage OUT Laser diode: LIGHT UP Focus servo: ON
Spindle kick, Tracking servo, Slider servo: ON/OFF

Standby states

POWER ON

Power is ON.

System bus communication (1) Transmit the bus data. Transfer the system POWER ON. P4 LCD POWER ON : "H" P53 LCDRST : "L" RESET Starts the LCD communication (2) P28 VOLDATA P34 VOLCLK Transfer P75 EXPCE
Initialize the LCD microcomputer.
DECK control IC starts Microcomputer the data transfer.
Does CD door open ? Is P9 and P10 at "H" level ? Yes P11 : "H" Close the CD door.

DECK Initialize Sequence

MOTOR ON

Initialize the DECK.

Does the DECK Head down ? (Is the MODE SW OFF ?) No Yes
Check P79 MODE SW input is "L". Yes
Perform the following process after one second after the POWER ON. Transfer the Function, Volume, BASS and TREBLE data to the volume IC. (3)

Is three times ? No

Retry it to two times.
Function : CD (4) Initial setting of CD decoder IC. P22 CDCONT : "L"
Function : TUNER (5) Initialize the TUNER PLL IC. P64 TXPOW : "H"
500 msec. solenoid is ON ? IC2601(BU4094) P12 is "H"
Perform the following process after The condition that MUTE 3.9 seconds after the POWER ON. is not released. Release the system MUTE. VOLUME : 0 P71 SYSMUTE : "H" DECK Function : excepting PLAY

MOTOR OFF

IC2601(BU4094) P11 is "L"
Perform the following process after 4.0 seconds after the POWER ON. Release the speaker relay. P70 SPCONT : "H"
7.1.2 SINGLE OPERATION METHOD Jigs and Measuring instruments

Low-frequency oscillator

DC powersupplay
Single operation method and frequnency oscilator inputlevel.
1. Connect part A of the AF ASSY [W420(+8V),W421 (+15V), W422 (+5.6V), W423(GND) and DC power-supplay. (Refer to Fig. 7-1.) DC power-supplay Connect point A AF ASSY, W420 (+8v) AF ASSY, W421 (+15v) AF ASSY, W422 (+5.6v) AF ASSY, W423 (GND) Voltage (V) +8V +15V +5.6V GND Remarks
2. Connect part B of the U-COM ASSY [ CN105 pin8 (AC), AF ASSY[W423 (GND)] and frequency oscillator. (Refer to Fig. 7-1 and 7-2.) Low-frequency oscillator Connect point B frequency U-COM ASSY, CN105 pin8 (AC) 50 or 60 Hz AF ASSY, W423 (GND) level Approx.2.0 Vrms Gnd osc GND Remarks Note.
Note: Set up the low-frequncy oscillator level with in the limits of product moves.
W420.+8V W421.+15V W422.+5.6V W423.GND

Fig. 7-1

Frequency: 50 or 60Hz Level: Approx. 2Vrms

OSC CN105 pin8 (AC)

Fig. 7-2

7.1.3 DISASSEMBLY

1 Front Panel Assy

7.2.1 IC
The information shown in the list is basic information and may not correspond exactly to that shown in the schematic diagrams.
CXA1821M (CD ASSY : IC1101)

RF AMP. IC

Block Diagram
FE BIAS LC / PD LD ON RFO RFE VCC EO VC FE TE

TRACKING ERROR AMP

VC BUFFER

RF EQ AMP 10k 5.6k

FOCUS ERROR AMP

56k 25p

APC LD AMP

RF SUMMING AMP

25p VC

12p 820k

Function

Pin Function

No. Pin Name LD PD A B C D VEE F E EI I Tracking error amplifier input. Gain adjust the signal which was input from pin 9.

No. 13

Pin Name EO VC TE FE BIAS FE RFO RFE LC/PD LD ON VCC
O APC amplifier output I APC amplifier input
Gain adjust the signal which was input from pin 9.
O DC voltage output of (VCC+VEE)/2 O Tracking error amplifier output F-E signal is output. I Pin for focus bias adjustment O Focus error amplifier output O RF amplifier output
RF amplifier and FE amplifier input

Ground pin

Pin for RF amplifier equalization Bias pin VCC : LC , OPEN : PDIC ON/OFF switching pin of APC amplifier VCC : ON, VEE : OFF Power supply pin
CXD2587Q (CD ASSY : IC1201)

SERVO IC

WFCK PCMD EMPH SYSM XUGF C2PO LRCK

TESTEST

Clock Generator RFAC 51 ASYI 49 ASYO 48 BIAS 50 XPCK 17 FILO 54 FILI 55 PCO 56 CLTV 53 MDP 26 LOCK 25 SENS 8 DATA 5 XLAT 6 CLOK 7 SPOA 12 SPOB 13 XLON 14 SCOR 20 SQSC 1 SQCK 2 CPU Interface Servo Auto Sequencer Digital CLV Digital PLL Sub Code Processor Asymmetry Corrector EFM Demodurator
Error Corrector D/A Interface Senal-In Interface Over Sampling Digital Filter 16k RAM Digital OUT Timing Logic
3 XRST 79 RMUT 80 LMUT 66 XTAI 67 XTAO
3rd-Order Noise Shaper PWM PWM
70 AOUTAINLOUTAOUTAINLOUT2
Signal Processor Block Servo Block

SERVO Interface

DAC Block
60 DOUT 9 SCLK 21 COUT 27 SSTP 11 ATSK 22 MIRR 23 DFCT 24 FOK
PWM GENERATOR FOCUS PWM GENERATOR TRACKING PWM GENERATOR SLED PWM GENERATOR
RFDC 43 CE 42 TE 41 SE 40 FE 39 VC 38 IGEN 46 OP-Amp Analog SW A/D Converter

MIRR DFCT FOK

SERVO DSP FOCUS SERVO TRACKING SERVO SLED SERVO
32 FFDR 33 FRDR 30 TFDR 31 TRDR 28 SFDR 29 SRDR

XC-IS21T Pin Function

Pin Name
SQSO SQCK XRST SYSM DATA XLAT CLOK SENS SCLK VDD ATSK SPOA SPOB XLON WFCK XUGF XPCK GFS C2PO SCOR COUT MIRR DFCT FOK

O I I I I I I O I I I O O O O O O O
SubQ 80-bit, PCM peak and level data output CD TEXT data output Clock input for SQSO readout System reset Mute input Reset when "L" Mute when "H"
TE CE RFDC ADIO AVSS0 IGEN AVDD0 ASYO ASYI BIAS RFAC AVSS3 CLTV FILO FILI PCO AVDD3 VSS VDD DOUT LRCK PCMD BCK EMPH
I I I O I O I I I I O I O O O O O O I O O I O O I O O O Tracking error input
Center servo analog input RF signal input OP amplifier output Analog GND Constant current input for OP amplifier Analog power supply EFM full-swing output ("L"=VSS, "H"=VDD) Asymmetry comparate voltage input Constant current input of the asymmetry circuit EFM signal input Analog GND VCO control voltage input for master Filter output for master PLL (Slave=digital PLL) Filter input for master PLL Charge pump output for master PLL Analog power supply Digital GND Digital power supply DIGITAL OUT output D/A interface LR clock output f=Fs
Serial data input from CPU Latch input from CPU Serial data is latched at the falling edge. Serial data transfer clock input from CPU SENS output to CPU Clock input for SENS serial-data readout Digital power supply Microcomputer extended interface (input A) Microcomputer extended interface (input B) Microcomputer extended interface (output) WFCK output XUGF output MNT1 and RFCK output by switching the command. XPLCK output command. MNT0 output by switching the
I/O Input and output for unti-shock
GFS output MNT3 and XRAOF output by switching the command. C2PO output command. GTOP output by switching the
Outputs "H" when either subcode sync. S0 or S1 is detected.
I/O Input and output of track-number count signal I/O Mirror signal input and output I/O Defect signal input and output I/O Focus OK signal input and output GFS is sampled at 460Hz;when GFS is "H", this pin I/O outputs "H". If GFS is "L" eight consecutive samples, this pin outputs "L". Input when LKIN="H". O I O O O O O O I I I I I I Servo control output of spindle motor Detection signal input of disc innermost Sled drive output Tracking drive output Focus drive output Digital GND TEST pin : normally GND Crystal selector input "L":16.9344MHz , "H":33.8688MHz Center voltage input Focus error signal input Sled error signal input
D/A interface Serial data output (two's complement, MSB first) D/A interface Bit clock output Outputs "H" when the playback disc has emphasis, and "L" when there is no emphasis. Power supply for master clock Crystal oscillation circuit input Input the external master clock via this pin. Crystal oscillation circuit output GND for master clock Analog power supply L ch analog output L ch OP amp. input L ch LINE output Analog GND Analog GND R ch LINE output R ch OP amp. input R ch analog output Analog power supply R ch zero detection flag L ch zero detection flag

MDP SSTP SFDR SRDR TFDR TRDR FFDR FRDR VSS TEST TEST XTSL VC FE SE
XTAI XTAO XVSS AVDD1 AOUT1 AIN1 LOUT1 AVSS1 AVSS2 LOUT2 AIN2 AOUT2 AVDD2 RMUT LMUT
Notes) PCMD is an MSB first. two's complement output. GTOP is used to monitor the frame sync protection status. (High:sync protection window released) XUGF is the negative pulse for the frame sync derived from the EFM signal. It is the signal before sync protection. XPLCK is the inverse of the EFM PLL clock. The PLL is designed so that the falling edge of XPLCK and the EFM signal transition point coincide. GFS goes high when the frame sync and the insertion protection timing match. RFCK is derived with the crystal accuracy. This signal has a cycle of 136s. C2PO represents the data error status. XRAOF is generated when the 16K RAM exceeds the 4F jitter margin.
PDG242 (U-COM ASSY : IC5501)

System Control IC

No. Name
TCRECF TCTIN TCTOUT LCD POWER LIGHT CDDSW1 CDDSW2 STBYLED CDDSW3 CDDSW4 CDCOLSE CDOPEN CD LDON CDINSID CDSCLK CDSENS CDCLK CDLAT CDDATA CDSYSM CDRESET CDCONT CDMUTE LINE2 MUTE LINE1 MUTE LINE CONT VOLCE VOLDATA SCLK RST EXTAL XTAL Vss VOLCLK SYSPOW AVSS AVREF KEY1 KEY2 KEY3

I/O Description

I O O O O I I O I I O O I I O I O O O O O O O O O O O O O O O O O O Mecha RECF SW TAPE Tray load in TAPE Tray load out LCD ON/OFF LCD Buck light control CD Door detection Input 1 CD Door detection Input 2 Standby LED control CD Door detection Input 3 CD Door detection Input 4 CD Door close drive output CD Door open drive output CD laser diode control output CD inside SW input CD automatick adjustment input clok CD LSI replay (GFS, FOK) CD LSI clock CD LSI latch CD LSI data CD decoder mute control CD LSI reset CD LSI power control CD mute control Line2 mute control Line1 mute control Line ATT control E-Volume LSI chip enabled E-Volume LSI data System bus clock Reset Oscillator pulses ( 12MHz) GNDD E-Volume LSI clock System power control GNDD +5V Key input Key input Key input
PROTECT SIMUKE ST/TUNE JOGIN SDATA SREQ LCDCLK LCDCE LCDDAT CDSQCK CDSQSO LCDRST TOUCH MS RDSDATA PDSPOW BEEP ACPULS REMIN CDSCOR RDSSCLK TXPOW TXCE TXODAT TXCLK TXIDAT TXMUTE SPCONT SYSMUTE VDD NC TCSENS EXPCE TCOPEN TCCLOSE TCHALF TCMODE TCRECR
O O O O Protect detection input Model type select input TX STREO/TUNED input Multi JOG input -
I/O Systembus data I/O Systembus reqest O O O O I O I I I O O I I I I O O O O I O O O I O O O I I I LCD micro computer clock LCD micro computer CE LCD micro computer data CD SUBQ clock CD SUBQ data input LCD micro computer reset control Touch sencer input MS Signal input RDS data input RDS power control beep control AC puls input Remote control input CD SUBQ level input RDS clock input TX poer control TX LSI chip enabled TX LSI data output TX LSI clock TX LSI data input TX mute control Speaker relay control System mute control +5.0V Reel pulse EXPIC for CE control Tray open SW Tray close SW Mechanism HALF SW Mechanism mode SW Mechanism RECR SW

8. PANEL FACILITIES AND SPECIFICATIONS

8.1 PANEL FACILITIES

Front Panel

[CD Tuner Deck]

3 * 4 @ 0 % = ~ ! &
1 CD cover OPEN/CLOSE touch sensor 2 CD spindle 3 CD slide cover 4 Display window @ BASS button 6 TUNER button 4 TUNING button 8 STANDBY/ON button and standby indicator
This is the power switch. ON : When set to the ON position, power is supplied and the unit becomes operational. STANDBY : When set to the STANDBY position, the main power flow is cut and the unit is no longer fully operational. A minute flow of power feeds the unit to maintain operation readiness.

_ _ +

# * %(
= CD button ~ ASES button ! Stop (7) button & BALANCE button # LINE 2 IN jack * OPT (Optical) OUT jack % LINE 2 OUT jack ( Cassette tray ST. (Stereo) WIDE button * VOLUME/JOG dial TREBLE button _ Play/direction (2 3) button _ TUNING + button + TAPE button STATION MEMORY button FREQ (Frequency)/STATION button REVERSE MODE button TAPE OPEN/CLOSE (0) button REC/STOP button LINE 1, 2 button

Energy-Saving Design

This product has been designed to reduce energy consumption when the unit is in the power off (standby) mode. Consult the Specifications for the power consumption in standby mode.
9 DISPLAY button 0 TIMER REC/WAKE UP/CLOCK ADJ button % DOLBY* NR ON/OFF (DEMO) button
* Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation. DOLBY and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation.

Display

~ & % ^ =

) _ +

Display window
0 = ~ ! @ # $ % ^ & * ( ) _ + Lights when Dolby NR on optional cassette deck is ON. Lights when using A.S.E.S. (Auto Synchro Editing System). Lights when optional cassette deck is set to recording mode. Lights during program mode. Lights during random playback. Lights during repeat playback. Lights when setting wake-up timer. Lights during sleep timer operation. Lights when setting timer recording. Lights during stereo wide sound mode. Lights to indicate tape direction of optional cassette deck. Lights to indicate reverse mode of optional cassette deck. Lights during FM stereo reception. Lights when FM monaural reception is ON. Lights when setting Beat Cut function. Lights during radio broadcast reception. Indicates frequency and major operation status. Lights when Dolby NR is ON. Lights when cassette deck is set to recording mode. Lights to indicate tape direction of cassette deck. Lights to indicate reverse mode of cassette deck.

Remote Control Unit

0 CD/MD/TAPE/TUNER operation buttons [CD/MD operation]

7 Accessories

Speaker cords... 2

7 Cassette Deck Section

System.. 4-track, 2-channel stereo Heads.. Recording/playback head x 1 Erasing head x 1 Motor.. DC Servo motor x 1 Tape type. TYPE I (Normal), TYPE II (High/CrO2) NOTE: Specifications and design subject to possible modification without notice, due to improvements.

Accessories

(White) (L= 1.5m)
1 Remote control unit x 1 (CU-XR056) 2 AA/R6P dry cell batteries x FM antenna x AM Loop antenna x System cable x RCA pin-plug stereo cable x 1 (L= 1.5m) 7 Power cord x 1
: AXD7224 : VEM-013 : ADH7004 : ATB7007 : ADE7039 : VDE1052 : XDG3007

ORDER NO.

RRV2159

CD TUNER DECK

XC-IS21T
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).

ZBDXJ ZLXJ/NC

Model XC-IS21T

Power Requirement

DC power supply from other system DC power supply from other system

Remarks

This service manual should be used together with the following manual(s):

XC-IS21T/ZUCXJ

Order No.

RRV2148

PIONEER ELECTRONIC CORPORATION 4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan
PIONEER ELECTRONICS SERVICE, INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A. PIONEER ELECTRONIC (EUROPE) N.V. Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Allexandra Road, #04-01, Singapore 159936
PIONEER ELECTRONIC CORPORATION 1999
T ZZY JUN 1999 Printed in Japan

1. SAFETY INFORMATION

This service manual is intended for qualified service technicians; it is not meant for the casual do-it-yourselfer. Qualified technicians have the necessary test equipment and tools, and have been trained to properly and safely repair complex products such as those covered by this manual. Improperly performed repairs can adversely affect the safety and reliability of the product and may void the warranty. If you are not qualified to perform the repair of this product properly and safely, you should not risk trying to do so and refer the repair to a qualified service technician.
WARNING This product contains lead in solder and certain electrical parts contain chemicals which are known to the state of California to cause cancer, birth defects or other reproductive harm. Health & Safety Code Section 25249.6 Proposition 65
IMPORTANT THIS PIONEER APPARATUS CONTAINS LASER OF CLASS 1. SERVICING OPERATION OF THE APPARATUS SHOULD BE DONE BY A SPECIALLY INSTRUCTED PERSON.
LASER DIODE CHARACTERISTICS MAXIMUM OUTPUT POWER: 5 mw WAVELENGTH: 780-785 nm

LABEL CHECK

ZLXJ/NC type Only

Additional Laser Caution

1. Laser Interlock Mechanism The loading position detect switch (in CD mechanism assembly) is set to "CLMP ON(CD CLOSE)" (ON:low level,OFF:high level) position, the system control IC(IC5501) get the "CLMP" signal, and hand the laser "LDON" signal to IC1101. Then a laser diode can be lighted except when the level of signal CLMP is low. The interlock also does not function in the test mode*. Laser diode oscillation will continue, if pin 1 of CXA1821M (IC1101) on the CDMAIN UNIT is connected to GND, or pin 19 is connected to low level (ON), or else the terminals of Q1101 are shorted to each other (fault condition). 2. When the cover is opened, close viewing of the objective lens with the naked eye will cause exposure to a Class 1 laser beam.

(Right side view)

* : Refer to page 54.on the service manual RRV2148.
2. CONTRAST OF MISCELLANEOUS PARTS
NOTES: Parts marked by "NSP" are generally unavailable because they are not in our Master Spare Parts List. The mark found on some component parts indicates the importance of the safety factor of the part. Therefore, when replacing, be sure to use parts of identical designation. Screws adjacent to mark on product are used for disassembly. Reference Nos. indicate the pages and Nos. in the service manual for the base model. When ordering resistors, first convert resistance values into code form as shown in the following examples. Ex.1 When there are 2 effective digits (any digit apart from 0), such as 560 ohm and 47k ohm (tolerance is shown by J=5%, and K=10%). 56 x 101 RD1/4PU 1 J 47 x 47k RD1/4PU 3 J R50 0.5 RN2H R K 1RRS1P 1 R 0 K Ex.2 When there are 3 effective digits (such as in high precision metal film resistors). 5.62k 562 x RN1/4PC F

CONTRAST TABLE

XC-IS21T/ZBDXJ, ZLXJ/NC and ZUCXJ types are constructed the same except for the following :
Ref. No. Mark Symbol and Description ZUCXJ type
PCB ASSEMBLEIES DECK-COMP ASSY U-COM ASSY COMPLEX ASSY AF ASSY PACKING Operating Instructions (English/French) Operating Instructions (English/Chinese/Spanish) Operating Instructions (English/ Chinese/Spanish/Portuguese) NSP Warranty Card Power Cord Packing Case EXTERIOR (1/2) Name Label Label M Coution Label
Part No. Remarks ZBDXJ type ZLXJ/NC type

NSP P7-1 NSP P7-3

AWM7441 AWU7327 AWM7433 AWU7298
AWM7440 AWU7326 AWM7432 AWU7297

P3-3 P3-3 P3-3

ARE7224 Not used Not used
Not used ARE7232 Not used
Not used Not used ARE7233

P3-7 P3-12 P3-18

ARY7033 XDG3007 AHD7751

Not used ADG1158 AHD7763

Not used ADG1154 AHD7742

P5-12 P5-13

AAL7231 ARW7065 Not used

AAL7229 ARW7065 Not used

AAL7228 Not used PRW1018
Note: The numbers in the remarks column correspond to the numbers on the exploded diagram, Refer to Exploded views

EXPLDED VIEWS

EXTERIOR SECTION

Rear Cover

ZLXJ/NC type only No.1
CONTRAST OF PCB ASSEMBLIES

C F U-COM Assy

AWU7326 and AWU7327 are constructed the same except for the following:
Part No. Mark Symbol and Description AWU7327

R5576 RS1/10S103J

Remarks AWU7326

RS1/10S223J

E F AF Assy
AWU7297 and AWU7298 are constructed the same except for the following:
Part No. Mark Symbol and Description AWU7298

R3063, R3064 RS1/10S0R0J

Remarks AWU7297

RS1/10S152J