Sony CDX-525RF - Compact Disc Changer System User manual

SERVICE MANUAL
CDX-525RF
SUPPLEMENT-1
File this supplement with the service manual.
US Model
Canadian Model
AEP Model
UK Model
E Model
Subject: Mechanism Deck Modification (MG-250D-137)
(ECN-CSA00838)
The mechanism deck was changed from MG-250C-137 to MG-250D-137.
At the same time, MAIN and JACK boards were been changed.
This supplement contains only a new type mechanism deck and boards.
TABLE OF CONTENTS
1. NEW/FORMER DISCRIMINATION.................... 2
2. DISASSEMBLY ......................................................... 3
3. DIAGRAMS
3-1. Note for Printed Wiring Boards
and Schematic Diagrams ................................................ 5
3-2. Printed Wiring Boards – RF Section – .......................... 6
3-3. Schematic Diagram – RF Section –............................... 7
3-4. Schematic Diagram – MAIN Section (1/2) –................ 8
3-5. Schematic Diagram – MAIN Section (2/2) –................ 9
3-6. Printed Wiring Boards
–MAIN Board (Component Side) – ............................... 10
3-7. Printed Wiring Board
–MAIN Board (Conductor Side) – ................................. 11
3-8. Printed Wiring Boards – JACK Boards –...................... 12
4. EXPLODED VIEWS ................................................ 12
5. ELECTRICAL PARTS LIST ............................... 17

2
1. NEW/FORMER DISCRIMINATION
7Y187A
C: MG-250C-137 (Former type)
D: MG-250D-137 (New type)

3
Note: Follow the disassembly procedure in the numerical order given.
2. DISASSEMBLY
MECHANISM DECK (MG-250D-137)
2 tension spring (FL)
2 tension spring (FL)
1 two dampers (250)
1 two dampers (250)
3 jack flexible board
(CNJ901)
firament tape
4 mechanism deck (MG-250D-137)
MAIN BOARD
1 main flexible board
(CNJ12)
6 three screws (FP)
7 main board
2 Break the soldering
of motor (M104) lead.
3 screw
(PTT2
× 4)
4 heat sink
5 two precision screws
(P1.7
× 2.5)

4
RF BOARD
4
3
two screws
(PTT2 × 4)
5 connector
(CNP53)
7 RF board
3 two screws
(PS2 × 4)
1 OP flexible board
(CNJ11)
2 Break the soldering
of motor (M102) lead.
6 Break the soldering of lead.
CHUCKING MOTOR ASS’Y (M103)
1 Break the soldering
of motor (M103) lead.
2 two screws (PTT2 × 4)
4 chucking motor ass’y
(M103)
3 retainer (CHM)

55
3. DIAGRAMS
3-1. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Printed Wiring Board:
•X: parts extracted from the component side.
•Y: parts extracted from the conductor side.
•z: Through hole.
•b: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side: Partson thepatternface sideseenfrom
(Conductor Side) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Component Side) the parts face are indicated.
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ωand 1/4W or less unless otherwise
specified.
•f: internal component.
•C: panel designation.
•U: B+ Line.
•H: adjustment for repair.
• Powervoltage isdc14.4V andfedwith regulateddcpower
supply from CD changer controller.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : CD PLAY
• Voltages are takenwith aVOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
J: CD PLAY
Note:
The components identi-
fied by mark 0or dotted
line with mark 0arecriti-
cal for safety.
Replace only with part
number specified.
Note:
Lescomposants identifiés par
une marque 0sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce portant le numéro
spécifié.

66
CDX-525RF
3-2. PRINTED WIRING BOARDS – RF Section –
• Semiconductor
Location
Ref. No. Location
IC11 D-7
IC51 B-9
IC52 H-4
Q11 E-8
C52
C60
C59
R62
R63
C55
R57
R58
R65
R56
C54
R61
C21
R30
R64
C31
C38
C34
R40
C26
C39
C12
C19
C18
C10
CNP53
C56
C58
C57
IC52
1-676-014-
11
(11)
RF BOARD (COMPONENT SIDE)
R51
R53
C51
R52
R54
R31
R60
R32
RV14
C22
C24
R39
C28
R37
C25
R34
C29
R41
C35
R47
R42
R43
R45
C37
R46
C36
R44
IC11
C43
C17
C16
C14
R25
R18
R26
C15 R17
R59
C53
R50
C42 C41
R55
R49
R27
C32
C30
C27
C33
R38
R36
R35
R48
R14
R11
R22
R16
C40
R28
C23
R33
R12
R13
BCE
C13
CNJ11
Q11
1-676-014-
11
(11)
RF BOARD (CONDUCTOR SIDE)
IC51
CNJ12
SW1
(LIMIT)
SW BOARD
1-664-104- 11
(11)
M101
(SPINDLE)
A
MAIN
BOARD
OPTICAL PICK-UP
BLOCK
(KSS-521A)
OP FLEXIBLE BOARD
1-664-626- 11
SW11
CHUCKING END
DETECT
SW12
SAVE END
DETECT
1234567891011
A
B
C
D
E
F
G
H
I
J
+
1
2
BLU
YEL
YEL
BLU
+
+
+
+
85
14
17
1
+
3927
40
52
1
13
14
26
1
26
14
87
1
28 22 21 15
M
MAIN FLEXIBLE BOARD
1-679-339- 11
BP12 (FE)
TP
(VC)
TP
(FE0)
BP11 (TE)
TP (TE1)
TP
(RF)
TP (GND)
05
(Page 10)

77
CDX-525RF
3-3. SCHEMATIC DIAGRAM – RF Section –
The components identified by mark 0or dotted
line with mark 0are critical for safety.
Replaceonlywith part number specified.
Lescomposants identifiés parune marque 0sont
critiques pour la sécurité. Ne les remplacer que
par une pièce portant le numéro spécifié.
(Page 8)

88
CDX-525RF
3-4. SCHEMATIC DIAGRAM – MAIN Section (1/2) –
(Page 7)

99
CDX-525RF
3-5. SCHEMATIC DIAGRAM – MAIN Section (2/2) –

1010
CDX-525RF
3-6. PRINTED WIRING BOARDS – MAIN Board (Component Side) –
• Semiconductor
Location
Ref. No. Location
D201 D-4
D202 F-3
D203 H-5
D204 H-5
D205 I-6
D206 H-5
D207 H-5
D301 F-8
D311 G-4
D416 C-6
D417 C-6
D501 F-3
D502 F-4
D503 F-4
D504 F-4
D505 F-3
IC101 C-9
IC202 H-5
IC204 F-5
IC301 H-4
IC302 E-9
IC401 B-6
Q202 C-3
Q203 I-5
Q204 I-6
Q205 H-6
Q301 F-10
Q401 E-5
Q402 E-4
Q403 D-4
Q404 D-4
R213
R212
R104
R105
C806
C104
C103
C124
R103
R101
C102
C107
R102
R106
C105
C106
C101
C123
C110 C108
R318
C402
C121
C309
R331
C306
C122 R301
C807
FB101
FB102
FB103
FB401
FB414
FB412
FB413 FB411
R306
R313
C304
R302
R305
R312
R308
R303
C305
R304 R319
R307 R310
R401
C408
C403C406
R411
R202
R201
C203
C413 C414
C412
R408 R406
R407 R405
FB421
FB422
FB423
R501
C502
C501
C205
C308
R343 R321
C302
C310
C503
C208
C213
C211
C212
R205
R206
R203
R208
R204
R311
R207
D505 D503 D502 IC204
D311
D301
D417
D416
D504D501
D201
D202
BCE
Q202
BCE
BCE BCE
BCE
Q402
Q403
Q404
Q401
Q204
BCE
Q205
Q203
BCE
D206
D207
D205
Q301
IC302
D203
D204
X401
IC101
IC401
05
12
IC301
MAIN BOARD (COMPONENT SIDE)
1-672-619- (12)
12
2E
2C 1B
1E
1
30
31 26
1
50
51
80
81 100
1
2441
64
65 80
40 25
100
A
AK
A
K
A
K
1
12
24
13
AK
A
K
A
A
A
K
KA
K
71
814
K
AK
AK
1
4
8
5
AK C
EB
AK
AK
AK
AK
AK
IC202
2
13
1-676-340- 11
JACK FLEXIBLE BOARD
B
JACK BOARD
CNJ901
1-676-339- 11
MAIN FLEXIBLE BOARD
A
RF BOARD
CNJ12
113
(ELEVATOR)
MM
1
A
2 3 4 5 6 7 8 9 10 11
B
C
D
E
F
G
H
I
J
12
BLE
RED
X301
C109 +
(Page 6)
(Page 12)