Pioneer XC-IS21MD User manual

ORDER NO.
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
c
RRV2124
XC-IS21MD
1. SAFETY INFORMATION ....................................... 2
2. EXPLODED VIEWS AND PARTS LIST ................. 3
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM 14
4. PCB CONNECTION DIAGRAM ........................... 38
5. PCB PARTS LIST ................................................ 52
6. ADJUSTMENT..................................................... 57
7. GENERAL INFORMATION .................................. 68
7.1 PARTS........................................................... 68
7.1.1 IC.......................................................... 68
CONTENTS 7.2 DIAGNOSIS................................................... 83
7.2.1 DETAILS OF ERROR DISPLAY ........... 83
7.2.2 SEQUNCE AFTER THE POWER ON... 85
7.2.3 SINGLE OPERATION METHOD ........... 86
7.2.4 DISASSEMBLY ..................................... 88
7.2.5 PCB LOCATION.................................... 93
8. PANEL FACILITIES AND SPECIFICATIONS....... 94
T – ZZY APR. 1999 Printed in Japan
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
CD MD TUNER
Remarks
Type Model
XC-IS21MD Power Requirement
ZYXJ O DC power supply from other system
ZVXJ O DC power supply from other system
This product is a system(s) component.
This product does not function properly when independent; to avoid malfunctions, be sure
to connect it to the prescribed system component(s), otherwise damage may result.
CD MD TUNER XC-IS21MD RRV2124 This service manual
STEREO POWER AMPLIFIER M-IS21 RRV2129
SPEAKER SYSTEM S-IS21 RRV2128
System
IS-21MD
Component Service Manual Remarks

XC-IS21MD
2
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.
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
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.
∗: Refer to page 65.
Additional Laser Caution
ZYXJ type Only ZYXJ type Only
ZVXJ type Only
(Right side view)

3
XC-IS21MD
2.1 PACKING
2. EXPLODED VIEWS and PARTS LIST
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 the product are used for disassembly.
(2) CONTRAST TABLE
XC-IS21MD/ZYXJ and ZVXJ are constructed the same except for the following:
Mark ZYXJ type ZVXJ type
3 Operating Instructions ARC7255 Not used
(Spanish/Portuguese/Swedish/Dutch)
4 Operating Instructions ARE7225 Not used
(English/French/German/Italian)
5 Operating Instructions Not used ARB7197
(English)
NSP 6 Errata ARX7027 ARX7028
12 Power Cord XDG3001 ADG1156
14 Polyethylene Bag Not used Z21-013
(0.05 x 115 x 270)
Part No. Remarks
Symbol and Description
No.
9
10
13
13
12
2
8
11
19
1
16
15
12
5
4
3
6
7
14
17
18
ZVXJ type Only
ZYXJ type Only
(1) PACKING PARTS LIST
Mark No. Description Part No.
1 System Cable ADE7039
2 FM Antenna ADH7005
3 Operating Instructions See Contrast table (2)
(Spanish/Portuguese/Swedish/Dutch)
4 Operating Instructions See Contrast table (2)
(English/French/German/Italian)
5 Operating Instructions See Contrast table (2)
(English)
NSP 6 Errata See Contrast table (2)
NSP 7 Warranty Card ARY7022
8 AM Loop Antenna ATB7007
9 Remote Control Unit AXD7223
(CU-XR055)
10 RCA Pin- plug Stereo Cable VDE1052
(L= 1.5m)
NSP 11 Dry Cell Batteries(AA/R6) VEM-013
12 Power Cord See Contrast table (2)
13 Polyethylene Bag Z21-038
(0.03 x 230 x 340)
14 Polyethylene Bag See Contrast table (2)
(0.05 x 115 x 270)
15 Side Pad ML AHA7240
16 Side Pad MR AHA7241
17 Packing Sheet AHG7053
18 Packing Case AHD7754
19 Battery Cover AZA7331

4
XC-IS21MD
2.2 CD MECHANISM ASSY
2
53
10
1
4
7
8
6
9
1 KSS-62A(RP) 8-820-063-(03)
2 Sled Screw Assy X-2646-389-(1)
3 Sled Motor Assy A-4912-199-(A)
4 MD Assy X-2646-482-(1)
5 Geer BN 2-627-761-(02)
6 Rack Spring 2-646-912-(1)
7 Holder 2-648-913-(1)
8 Tapping Screw 2-646-352-01
9 Precision Screw 2-627-668-01
10 Tapping Screw 2-646-358-11
÷CD MECHANISM ASSY PARTS LIST
Mark No. Description Parts No.

5
XC-IS21MD
1 Rear Cover AMC7029
2 Cussion Rubber AEB7154
3 Jack Door AAN7188
4 Jog Lens AAK7651
5 Jog Knob AAA7005
6 ••••••••
7 ••••••••
8 Jog Escutcheon AAK7620
9 Screw BBZ30P080FMC
10 Screw VPZ30P100FMC
(1) EXTERIOR (1/2) PARTS LIST
Mark No. Description Parts No.
(2) CONTRAST TABLE
XC-IS21MD/ZYXJ and ZVXJ are constructed the same except for the following:
Mark ZYXJ type ZVXJ type
NSP 12 Name Lable AAL7232 AAL7233
13 Coution Label PRW1233 PRW1018
14 Coution Label VRW1094 Not used
Part No. Remarks
Symbol and Description
No.
10
12
9
9
5
8
4
8
3
2
10
10
9
2
11
1
Refer to "2.5 FRONT PANAEL ASSY (1/2)
and 2.6 FRONT PANEL ASSY (2/2)"
13
14
ZYXJ type
Only
11 Screw BMZ30P060FZK
NSP 12 Name Label See Contrast table (2)
13 Caution Label See Contrast table (2)
14 Caution Label See Contrast table (2)
Mark No. Description Parts No.
2.3 EXTERIOR (1/2)

6
XC-IS21MD
2.4 EXTERIOR (2/2)
22 23
21 19
9
4
24
22
20
10
22
15 3
21 18
25
1716
14 13
11
5
12
8
32
32
28
30
26
29 21
2
21
33 27
31
27
21 31 27
1
21
Refer to
" 2.7 MD MECHANISM
ASSY "
Note 1 Cutting Position
(No.32 (Supporting Mold)
Note 1
Note 1
Cutting
Cutting
No.32
Rear Corver
21
A
A

7
XC-IS21MD
1 U- COM ASSY AWU7329
2 MD ASSY AWU7335
3 AF ASSY AWU7300
NSP 4 R- TERMINAL ASSY AWU7316
5 FM/AM TUNER MODULE AXQ7068
6 ••••••••
7 ••••••••
NSP 8 Chassis M ANA7087
9 Rear Panel ANC7735
NSP 10 Shield Plate ANK7059
11 Shield Case T ANK7050
12 Shield Case B ANK7051
13 Earth Plate XNG3015
14 Ceramic Capacitor CKPUYB102K50
15 PC Support DEC1932
NSP 16 Spacer AEB7092
17 Rubber Sheet AEB1111
18 Leg Assy IS AEC7202
19 Locking Card Spacer VEC1596
NSP 20 PCB Spacer (3 x 6) AEC7156
21 Screw BBZ30P080FMC
22 Screw VPZ30P080FZK
23 Connector Assy 3p ADX7252
24 23P F.F.C /30V ADD7150
NSP 25 TX CONNECT ASSY AWU7323
26 30P F.F.C /30V ADD7135
27 Float Rubber REB1328
NSP 28 Sub Chassis MD ANA7088
29 Shield Cover MD ANK7053
NSP 30 MD Mechanism assy RXA1777
31 Float Screw RBA1133
32 Supporting Mold AZN7799
33 Screw ABA7054
÷EXTERIOR (2/2) PARTS LIST
Mark No. Description Parts No.

8
XC-IS21MD
7
8
9
11
5
6
10
29
26
25 30
24
16
10
18
29
19
29
27
27
15
15
37
29
17
29
29
21
20
29
35
31
28
23
32
34
33
22 2
4
3
1
13
14
13
14
36
2.5 FRONT PANEL ASSY (1/2)

9
XC-IS21MD
1 FRONT PANEL ASSY AWU7309
NSP 2 CD CLOSE SW ASSY AWU7320
NSP 3 CO OPEN SW ASSY AWU7319
NSP 4 F- TERMINAL ASSY AWU7312
NSP 5 LCD ASSY (MD) AWU7355
NSP 6 LIGHT- L ASSY AWU7321
7 Lens Holder AMR7247
8 Lens M AAK7615
9 Diffusion Sheet AAK7666
10 Reflector AMR7248
11 13P F.F.C/ 30V ADD7149
12 ••••••••
13 Frame ANG7235
14 Rail AMR7239
15 Blind AMR7261
16 PCB Holder L AMR7262
17 PCB Holder R AMR7263
18 Plating Button Assy AXG7077
19 Fuction Button B AAD7511
20 Window AAK7621
21 Complex Button AAD7532
22 Plating Button A AAD7507
23 Function Button A AAD7510
24 O/C Button AAD7506
25 Key O/C AAD7526
26 Connector 3p ADX7252
27 Screw IPZ30P100FMC
28 Screw ABA1005
29 Screw VPZ30P080FZK
30 17P F.F.C/ 30V ADD7145
31 Front Panel M AXG7076
32 MD Flap AAN7190
33 MD Spring ABH7154
34 MD Flap Holder AMR7236
NSP 35 MD FLAP SW ASSY AWU7324
36 PU Caution Label ARW7059
37 Screw VPZ30P100FMC
÷FRONT PANEL ASSY (1/2) PARTS LIST
Mark No. Description Parts No.

10
XC-IS21MD
B
C
A
20
27
27
21
21
12
25
13 (1/2)
11
25 24
6
5
9
10
23
8
7
2
17
21
19
18
26
12
25
13 (2/2) 3
22
1
16
15
14
4
Note 1 Cutting Position
(No.13 (Mecha Holder)
Cutting
Note 1
Note 1
No.13
(2/2)
No.13
(1/2)
Refer to
" 2.2 CD MECHANISM ASSY "
2.6 FRONT PANEL ASSY (2/2)

11
XC-IS21MD
1 CD MOTOR ASSY AWU7318
2 CD ASSY AWU7306
3 Slider Motor VXM1033
NSP 4 Motor Shield ANK7067
5 Motor Pulley PNW1634
6 Gear Holder AMR7240
7 Gear A ANW7063
8 Gear B AMR7260
9 Gear Pulley A ANW7066
10 Belt AEB7171
11 CD MECHANISM ASSY KSM-620AAA
12 Float Spring ABH7170
13 Mechanism Holder AMR7242
14 CD Door Window AAK7673
15 CD Door Escutcheon AAK7619
16 CD Door AAN7189
17 Shaft Assy AXG7078
18 Shaft Holder AMR7237
19 Cussion Rubber AEB7154
20 Screw BBZ30P080FMC
21 Screw VPZ30P080FZK
22 Screw ABA7054
23 Screw PMZ26P040FMC
24 Screw IPZ20P080FMC
25 Float Rubber AEB7129
26 17P F.F.C/ 30V ADD7146
27 Screw VPZ30P100FMC
÷FRONT PANEL ASSY (2/2) PARTS LIST
Mark No. Description Parts No.

12
XC-IS21MD
2.7 MD MECHANISM ASSY
49
48
40
42
38 43
40
33
44
31
28
32
34
40
11
5
10
17
6
49
54
19
21 20
18
37
16
26
15
13
14
37
12
53
52
51
A
E
E
F
F
G
G
H
A
B
B
C
C
D
D
37
8
40
24
25
39
27
41 35
36
29
3946
23
30
45
2
3
50 47
54
CN103
CN101
CN102
CN105
1
H

13
XC-IS21MD
•MD MECHANISM ASSY PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.
1 CORE MAIN UNIT ASSY RWZ4334
NSP 2 CORE SW UNIT ASSY RWZ4335
3 Lead Card 7P RDD1403
4 Lead Wire RKP1814
5 Lever Spring RBH1463
6 Clamp Spring 1 RBK1074
7 ••••••••
8 Loading Belt REB1329
9 Lock Plate RNE1949
10 Loading Base RNK2323
11 Under Slider RNK2314
12 Gear Pulley RNK2316
13 Drive Gear RNK2317
14 Clutch Gear RNK2318
15 Flip Disk RNK2319
16 SW Lever RNK2320
17 Shutter Assy RXA1774
NSP 18 Upper Slider Assy RXA1782
19 Eject Spring RBH1461
20 Upper Slider RNK2324
21 Carrier RNK2315
22 ••••••••
23 Spindle Spring RBH1460
24 Lifter Spring RBH1462
25 Screw Guide RBK1072
26 S. H. Spring RBK1073
27 Guide Shaft RLA1312
28 Lead Screw RLA1311
29 Shield Case RNE1950
30 Reference Plate RNK2306
31 S. Holder RNK2307
32 Worm Wheel RNK2309
33 Hook RNK2310
34 Head Lifter RNK2311
35 MD Head RPB1063
36 MD Pick-up RWY1019
37 Screw Z39-019
38 Screw JFZ17P020FZK
39 Screw JGZ14P020FMC
40 Screw JGZ17P028FMC
41 Screw JGZ17P040FMC
42 Screw PMB20P040FMC
43 Servo Base Assy REA1283
NSP 44 Clamp Magnet RMF1002
NSP 45 Servo Base RNE1951
NSP 46 Disc Table RNK2305
NSP 47 Spindle Motor RXM1091
48 Carriage Motor Assy REA1284
49 Worm RNK2308
NSP 50 Carriage Motor RXM1090
51 Loading Motor Assy REA1290
52 DC Motor /0.75W PXM1010
53 CA Pulley RNK2322
54 Screw BPZ20P080FMC

XC-IS21MD
14
A
B
C
D
1234
1234
3. BLOCK DIAGRAM and SCHEMATIC DIAGRAM
3.1 BLOCK DIAGRAM
RF–AMP
(IC101)
IR3R55M
TUNER MODULE TX CONNECT
ASSY
FRONT PANEL
ASSY
CN6201 CN161
AB
M
TX LcH
KEY
JOG
TX LcH
KEY 1
JOG
KEY 2
KEY 3
TX+5V TX+5V
U-COM
ASSY
LCD
ASSY
J60J160
C
CD ASSY
F
CORE SW ASSY
CORE MAIN ASSY
K
J
D
TX LcH
TX+5V
(CD)
(TX) (TX)
(TX)
(TX)
(FS)
(TS)
(TS)
IC1101
CXA1821M
IC1201
CXD2587Q
IC5501
PDG241
IC1301
BA5970FP
(D.O)
(FS)
(SM)
(CM)
(CM)
(TS)
(TS)
(TS)
(FS)
(FS)
(TS)
(FS)
(FS)
(SM)
(FS) (FS) (TS) (TS) (SM) (SM) (CS) (CS)
CD L
D. OUT
D. OUT
CD LD ON
LCD_CE
LCD_CLK
LCD_DATA
LCD_CE
LCD_CLK
LCD_DATA
CN10 CN40
CN110
V+5UN
V+5UN
J101
V+5CDM
V+5CDM
GNDCDM
V+5CD
V+5CD
TFDR
TRDR
FFDR
FRDR
TFDR
TRDR
FFDR
FRDR
GND
GND
GND
V+5CD
V+5CD
GNDCDM
V+12TX
GNDU
GNDU AC
SYSTEM U-COM
1365 66 67 79 80 81
44
AC_PLUS
60
44
38
39
40 11
47 10
46 9
CN150 CN50
17
CN70
CN105
CN105
Q5501
V+12TX
V+5.6U V+5.6U
PICKUP
ASSY
INSIDE SW
(S701)
13
16
17
21
25–28
DRIVER
(IC106)
M56758FP
HEAD DRIVER
(IC116)
BD7910FV
13
17
15 7
30
31
29 28 35 34
9
12
8
LOAD SW
(S101)
LOAD SW
(S102)
DISC SW
(S702)
4
3
2
1
ENC/DEC
+
DIGITAL SERVO
(IC102)
LR376487
MECHA CONTROL
µCOM
(IC104)
PD5523A
3
50 74
73
40
66
4M–DRAM
(IC103)
M5M4V4400CTP-7
X'tal
(X101)
33.8688MHz
26–29, 32–37, 39–46
1–5, 9–12, 14–18, 22–25
EEP–ROM
(IC110)
BR93LC56F
3–6
31–33, 55
725
24
26
25
6
31
15
16
3
2
23
22
21
20
19
18
37
24
23 27 28
23
1 90
89
20
23
57
59
92
82–86, 89–100
15, 18, 19, 29, 40, 80, 44–54
35
36
34
37
64, 65
DIFFERENTIAL
AMP
(IC112)
BA4510F
EFM
EFMO
EFMIEFMO
FODF
FODF
FODR
FODR
TRDF
TRDR
SLDF
SLDR
TRDF
TRDR
SLDF
SLDR
DSCK
LD+
SW1
PLOAD
RLOAD
DISC
LD-
SPDF
DSTB
DADATA
DIN
ADDATA
MDDATA
SYSDATA
SPDR
LOADING
MOTOR
SLED MOTOR (CARRIAGE)
REC HEAD
SPINDLE MOTOR
(REC)
(REC)
(PB)
(PB)
MDCLK
CDLDON
MDODATA
MDIDATA
MDSTB
OPTIN1 OPTIN2
MDCLK
MDODATA
MDIDATA
MDSTB
OPTIN1 OPTIN2
VM+5V
D+5V
7
1
2
7
2
7
2
7
2
7
6
16
8
15
11
10
9
10
13
15
17
10
13
15
15 141312 3 2 1
15
10
3
4
8
5
7
24
27
30
25
14
17
20
18
11
10
9
8
7
1
M+5V
CN104
GND
GND
D.GND
D.GND
D.GND
D+5V
DIN
DADATA
ADDATA
MDDATA
SYSDATA
XDSCK
XDSTB
13
16
17
21
28
27
26
25
1
2
1
2
3
4
5
6
7
CN101
CN103
CN105
1
2
CN102
1
2
3
4
5
6
7
CN701
SL+
SL1
SP-
SP+
GNDMGNDM
SL+
SL1
SW1
DISC
SP-
SP+
GNDM
SW1
DISC
SL+
SL1
SP-
SP+
SW1
DISC
TP704 SP+ (RED) TP703 SP- (BLACK) TP702 SLD- (BLUE) TP701 SLD+ (ORANGE)
HEAD
HEAD
CD MECHA
ASSY
LD PD
PDIC PD1
PDIC PD2
F
E
CN1101
LD ON
SL +
CN1301
SL -
SP +
SP -
VC
T +
CN1101
F -
F +
T -
PICKUP ASSY
(2/2)
PICKUP ASSY
(1/2)
SL
SP
SL/SP
MOTOR
+
-
+
-
1
2
3
4
15
8
14
9
12
7
6
1
2
5
6
RF1
RF3
RF4
RF2
F-
T+
F+
T-
LOAD-
LOAD+

XC-IS21MD
15
A
B
C
D
5678
5678
AF ASSY
E
MD ASSY
L
R- TERMINAL
ASSY
H
TX LcH
CN5
REC L
PB L
CD L
LIN2
CN3
CN1
AOUT L
LIN1
LOUT1
LOUT2
CN32
CN31 CN131 CN7101
CN3
IC141
(NJM7805FA)
IC131
(NJM7812FA)
IC3001
(LC75398NE)
+
-
IC3002
(NJM4558MD)
31
2
(MO)
(MO)
(MO)
(MO)
(LO1)
(LO1)
(LO2)
(L1) (L1)
(L2) (L2)
(L1)
(LO)
(PB)
(PB)
(PB)
(PB)
(CD)
(L2) (L2)
(CD)
(REC)
(REC)
(REC)
(REC)
(REC)
(REC)
(REC)
(TX)
(L1)
(TX)
PB L
LIN 2
CD L
TX L
LIN1
AOUT L
AUDIO OUT
LINE IN1
LIN1
LOUT1
LIN2
LOUT2
CN132
J103
(LO2)
F- TERMINAL
ASSY
I
LINE OUT1
LINE OUT2
LINE IN2
OPT OUT
D3009D3008
TX+5V
CN1
CN5
D. OUT
CN4
CN2 CN4
CD. OUT
CN1
CD. OUT
LINE DIN
CD. OPT IN
J104
PB L
REC L
GND
GND
V+12V
V+12V
VD+5V
VM+5V
VD+5V
VM+5V
J102 J104
V+5UN
V+12TX
GNDU
V+5CDM
V+5CD
GNDCDM V+5UN
AC
V+5.6U
GNDS GNDS
V+12UNV+12UN V+12UN
1
AC
AC AC
3
V+5.6V
V+5.6V V+5.6V
4
B2GND
B1GND
GNDU
B2GND
B1GND
GNDU
V+5UN
5
B2GND
6
B1GND
9
GNDU
10
V+5UN
V IN
VCC
GND OPT
OPT IN/OUT
V+5 OPT
GND OPT
TO. STEREO PWER AMPLIFIER
(M-IS21)
V+12V
IC4001
(NJM7805FA)
VD+5VVM+5VVH+5V
V+5
SIGNAL ROUTE
: CD AUDIO SIGNAL
: LINE 1 SIGNAL
: MD PB SIGNAL
: LINE 2 SIGNAL
: MAIN OUT SIGNAL
: OPTICAL OUT SIGNAL
(L1)
(CD)
(PB)
(L2)
(MO)
(D.O)
(TX)
(LO1)
(LO2)
(LO)
(REC)
: TUNER AUDIO SIGNAL
: LINE OUT 1 SIGNAL
: LINE OUT 2 SIGNAL
: LINE OUT SIGNAL
: RECORDING SIGNAL
123
V+5
(D.O)
(D.O)
(D.O)
(D.O)
(D.O)
(D.O)
(D.O) (D.O)
DIN
CN4101
GND
VM+5V
GND
D.GND
D.GND
MOD DATA
J140
MD CLK
OPT2
OPT1
DSTB
MDI DATA
DA DATA
DA DATA
AD DATA
AD DATA
DSCK
DSTB
MD DATA
SYS DATA
D GND
VH+5V
IC4301
(AK4520A)
IC4801
(TC74HC00AF) IC4202
(BA4558F)
(PB)
VD+5V
VH+5V
VD+5V
VA+5V
VD+3V
VM+5V
VA+5V
+
+
VD+5V VM+5V
VA+12V
V+12V VM+5VVD+5V
Q4002
2SD1858X
Q4003
2SC1740S
D4004 D4003
VD+3V
VA+12V
VH+5V
VH+5V
VH+5V
VH+5V
7
9
8
10
3
2
6
7
9
8
10
3
2
6
6
7
9
12
6
7
9
12
2
8
9
7
1
1897
342
342
43
7
5
43
7
5
9
10
9
7
10
2
10
5
18
8
16
9
3
4
8
17
23
2
1
15
14
13
3
24
27
30
25
14
17
20
18
11
10
9
8
7
1
SIGNAL ROUTE
: FOCUS SERVO LOOP LINE
: TRACKING SERVO LOOP LINE
(FS)
(TS)
: SPINDLE MOTOR ROUTE
: CARRIAGE MOTOR ROUTE
: LOADING MOTOR ROUTE
(SM)
(LM)
(CM)

XC-IS21MD
16
A
B
C
D
1234
1234
3.2 OVERALL CONNECTION DIAGRAM
AF ASSY
(AWU7300)
CD MOTOR
ASSY
(AWU7318)
E
G
F-TERMINAL ASSY
(AWU7312)
I
CD ASSY
(AWU7306)
F
LCD ASSY
(AWU7355)
D
TUNER MODULE
(AXQ7068)
MD ASSY
(AWU7335)
TX CONNECT ASSY
(AWU7323)
A
L
CORE MAIN ASSY
(RWZ4334)
MD MECHANISM ASSY (AXA7077)
J
CORE SW ASSY
(RWZ4335)
K
B
CN2
CN4
CN1
J101
CN40
J60
J160CN161
CN6201
CN110
CN10
CN70
CN1101
CN1301
J111
CN11
CN3
J103
CN7
J107
CN170
CN104
J102
J104
J140
CN4101

XC-IS21MD
17
A
B
C
D
5678
5678
Note : When ordering service parts, be sure to refer to "EXPLODED VIEWS and PARTS LIST" or "PCB PARTS LIST".
U- COM ASSY
(AWU7329)
C
R-TERMINAL ASSY
(AWU7316)
H
FRONT PANEL ASSY
(AWU7309)
CD CLOSE SW ASSY
(AWU7320)
M
P
CD OPEN SW ASSY
(AWU7319)
LIGHT-L ASSY
(AWU7321)
O
NMD FLAP ASSY
(AWU7324)
Q
CN5
CN105
CN32
CN132 CN131
CN31
J55
J155
J54
J154
J152
CN51
J52
J51
CN150 CN50

XC-IS21MD
18
A
B
C
D
1234
1234
3.3 TUNER ASSY
(FM) (FM)
(FM)
(AM)(AM)(AM)
(AM)
(AM)
(FM)
(FM)
(FM)
(FM)
(FM)
(FM)
(FM)
(FM)
: AM SIGNAL ROUTE
: FM SIGNAL ROUTE
: TUNER AUDIO SIGNAL
(AM)
(FM)
(TX)
FM/AM TUNER MODULE
(AXQ7068)
A
RF AMP
MIX AMP
BUFFER
IF AMP
PLL
FM +B SW
AM RF TUNING BLOCK
OSC
A

XC-IS21MD
19
A
B
C
D
5678
5678
(FM)
(AM)
(AM)
(AM)
(FM)
(TX) (TX)
(TX)
J60
CN6201
CN161 J160
D20PYY1315
TX CONNECT ASSY
(AWU7323)
B
AF AMP
REGULATOR
AF AMP
C
B
A

XC-IS21MD
20
A
B
C
D
1234
1234
3.4 U-COM ASSY
U-COM ASSY
(AWU7329)
C
M
CN150
E
CN5
CN50
CN105
B
J160
J60
SIGNAL ROUTE
: TUNER AUDIO SIGNAL
(TX)
(TX)
(TX)
(TX)
C