Sony CDC-R237 Service Manual ▷ View online
21
21
CDC-R237
4-4. BLOCK DIAGRAM — FRONT SECTION —
(Page 20)
61
62
63
64
LCD DRIVER
IC601
1
S1
LCD601
LIQUID
CRYSTAL
DISPLAY
44
•
45
40
I
43
4
I
39
46
I
49
50
I
54
KS1/S40
KS1/S41
S4
I
S39
KS3
I
KS6
KI1
I
KI5
COM1-4
2
S2
3
S3
RE1
S611
RE2
LCD DI
LCD CLO
LCD CE
LCD DO
EJECT
LAMP+B(+9V)
D641-643
D651-653
671-673
D661
LCD
BACK LIGHT
DIMMER
CONTROL
Q661
S621
ROTARY
ENCODER
WITH
SWITCH
KEY
MATRIX
ILL
CHANGE
Q651,671
VDD(+5V)
S601,602,604-606,
608,610,612-618
608,610,612-618
DI
CL
CE
CE
DO
DFP IN
MAIN
SECTION
B
A
4-5. CIRCUIT BOARDS LOCATION
FRONT board
SUB board
SERVO board
MAIN board
AUX board
tuner unit
(TU101)
(TU101)
• Waveforms
— Servo Board —
(MODE: CD PLAY)
1
IC221
wg
(RFGO)
1.3Vp-p
2
3
Approx. 200mVp-p
IC221
4
(FNI)
0V
4
1.4Vp-p
16.9344MHz
IC241
ul
(XO)
Approx. 600mVp-p
IC221
qf
(TEO)
0V
5
Approx. 180mVp-p
IC221
5
(FPI)
0V
—
Main Board
—
6
4.332MHz
IC151
qd
(XIN)
1.1Vp-p
7
6.3MHz
IC901
ej
(X1)
1.5Vp-p
22
22
CDC-R237
4-6. PRINTED WIRING BOARDS — CD MECHANISM SECTION — • Refer to page 21 for Circuit Boards Location.
1
A
B
C
D
E
F
G
H
I
J
2
3
4
5
6
7
8
9
10
11
12
13
14
Q201
C203
C201
C235
C233
C234
C298
C265
X241
C278
C269
C270
C226
C250
C241
C251
C242
C283
C284
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
for schematic diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
%
: indicates tolerance.
•
f
: internal component.
•
C
: panel designation.
•
A
: B+ Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
f
: MW/LW
J
: CD
for printed wiring boards:
• X
: parts extracted from the component side.
• Y
: parts extracted from the conductor side.
•
x
: parts mounted on the conductor side.
•
a
: Through hole.
•
: Pattern from the side which enables seeing.
(The other layer’s patterns are not indicated.)
Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B)
Pattern face side: Parts on the pattern face side seen from the
(Side B)
pattern face are indicated.
Parts face side: Parts on the parts face side seen from the
(Side A)
(Side A)
parts face are indicated.
Note: The components identified by mark
0
or dotted line
with mark
0
are critical for safety.
Replace only with part number specified.
23
23
CDC-R237
(Page 25)
1
A
B
C
D
E
F
G
H
I
J
2
3
4
5
6
7
8
9
10
11
12
13
BRN
RED
GRN
ORG
YEL
GRN
ORG
YEL
S1
S2
R211
R208
R241
R225
R206
R221
R238
R249
R250
R224
R281
R282
R298
R299
R209
R203
R204
R229
R230
R247
R253
R235
R236
R244
R212
R223
R246
R231
R233
R202
R222
R237
R227
R256
R215
R245
R254
R255
C224
C268
C223
C272
C273
C274
C245
C246
C252
C253
C254
C281
C282
C262
C261
C237
C202
C221
C222
C227
C232
C248
C263
C271
C264
C247
C258
C259
C260
C225
C228
C279
C229
C230
R257
C275
R248
R205
R210
R213
R214
R226
R201
R239
R243
R251
R207
R258
TC201
JR102
JR201
JR203
L241
L242
IC201
L221
Q221
CON201
IC241
Q202
IC221
R240
Ref. No.
Location
IC201
D-7
IC221
F-10
IC241
I-7
Q201
E-5
Q202
G-5
Q221
F-8
• Semiconductor
Location
24
24
CDC-R237
• Refer to page 21 for Waveforms.
4-7. SCHEMATIC DIAGRAM — CD MECHANISM SECTION — • Refer to page 30 for IC Block Diagrams.
Note:
• Voltage is dc with respect to
ground under no-signal conditions.
no mark : CD PLAY
no mark : CD PLAY
∗
: Impossible to measure
(Page 26)
IC B/D
IC B/D
1
2
3
4
5.6k
3.9k
TP16
TP17
TP18
TP01
TP02
TP03
TP04
TP05
TP06
TP07
TP08
TP09
TP10
TP11
TP12
TP13
TP14
TP15
TP20
TP27
TP28
TP29
TP30
TP36
TP37
TP38
TP39
TP40
TP41
TP8V
TPG3
TPG4
R238
R245
R246
R247
R249
R250
R254
R255
R202
R203
R204
R227
R233
R235
R236
L221
TC201
L241
R212
R211
C203
C202
C221
C222
C225
C230
C229
C228
C234
R213
R214
R207
C259
C260
C241
C242
C252
R251
C254
R243
C279
C237
C262
C263
C246
C245
C201
C268
C270
C272
C275
C273
C274
C278
TP19
TP25
TP21
TP22
TP23
TPG6
TPG5
R201
R210
R298
R299
C233
R222
C232
R224
R223
R221
R229
R230
C224
R225
C223
JR203
C227
R208
R209
R206
R205
R226
R240
C226
C298
R215
R237
R239
R241
L242
JR201
TP26
C250
C261
C265
R244
C264
C258
C247
TP5V
R257
R258
JR102
R256
R248
R253
C271
TP31
TPG2
TPG1
TP32
TP33
TP34
TP35
C269
C253
CON201
R281
R282
C282
C281
C284
C283
C235
R231
Q202
Q221
Q201
X241
M2
M1
IC201
IC221
S1
S2
IC241
C251
C248
S3
S4
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