Sony CDC-R237 Service Manual ▷ View online
29
29
CDC-R237
4-12. SCHEMATIC DIAGRAM — FRONT SECTION —
Note:
• Voltage is dc with respect to ground under no-signal
conditions.
no mark : FM
no mark : FM
∗
: Impossible to measure
S606
S605
S602
S608
S612
S610
S618
S617
S616
S615
S614
S613
D602
D601
R606
R607
R608
R609
C605
S621
R641
R651
R652
R653
R671
R672
R673
R661
R654
R674
TP1
TP2
TP4
R662
R663
R610
S601
D671
D672
D673
D643
J601
R622
R621
CON601
C923
D641
D642
D651
D652
D653
D661
S604
R605
C601
C602
C603
R601
R603
R604
C604
R602
LCD601
IC601
Q661
Q671
Q651
R643
C622
C621
S611
JR642
(Page 27)
30
30
CDC-R237
IC221 TA2153FN (SERVO Board)
4-13. IC BLOCK DIAGRAMS
IC501 TA8272H (MAIN Board)
IC401 LC75421M-TLM-E (MAIN Board)
IC201 LA6557H-TE-L (SERVO Board)
28
27
26
25
24
23
22
1
2
3
21
20
19
18
17
16
15
SIGNAL
SYSTEM
POWER
MUTE
INPUT
LEVEL SHIFT
LEVEL SHIFT
LEVEL SHIFT
LEVEL SHIFT
OUTPUT
CONTROL
THERMAL
SHUTDOWN
4
5
6
7
8
9
10
11
12
13
14
REV
VCC2
V05-
V05+
V04+
V04-
V03+
V03-
V02+
V02-
V01+
V01-
VCC1
VIN1
VIN1G
FWD
S-GND
MUTE
VCC-S
VREF-IN
REG-OUT
REG-IN
VIN3G
VIN3
VIN2G
VIN2
VIN4
VIN4G
TAB2
TAB1
CH1
CH2
CH3
CH4
CH5
CH1,2
POWER
CH3,4,5
POWER
POWER
LROUT
LFOUT
+
–
+
–
+
–
4
VSS
3
CE
DI
5
7
+
–
9
6
LFIN
LOUT
12
LIN
AUX(L)
TUN(L)
L3
CD(R)
R3
TUN(R)
VREF
AUX(R)
CD(L)
L1
R1
LSELO
LBASS1
10
+
–
13
14
15
16
17
18
+
–
LTRE
11
LSB
LBASS2
8
RROUT
RFOUT
34
33
31
29
32 RFIN
ROUT
26 RIN
RSELO
RBASS1
28
25
24
23
21
RTRE
27
RSB
RBASS2
30
+
–
+
–
+
–
+
–
+
–
+
–
+
–
2
1
VDD
35
CL
36
CCB
INTERFACE
CONTROL
CIRCUIT
LOGIC
CIRCUIT
CONTROL
CIRCUIT
LVREF
RVREF
+
–
22
20
19
15
4
19
17
23
21
9
7
5
3
18
14
11
12
10
24
8
2
16
25
1
6
20
13
22
V REF
PRE GND
FR(-) GND FR(+)
RR(-) GND RR(+)
RL(+) GND RL(-)
FL(-) GND FL(-)
AUX IN
DIAGNOSIS
OUT
OUT
VDD
MUTE ST-BY
FR
RR
RL
FL
VDD
TAB
30
29
28
25
27
26
24
23
22
21
20
19
18
16
17
1
2
3
6
4
5
7
8
9
10
11
12
13
14
15
PEAK BOTTOM
3
STATE
DET.
AGC
AMP
I
I
I-I
I-I
FEO
FEN
SEB
RFRP
BTC
RFCT
RFRPIN
RFGO
GVSW
AGCIN
RFO
RFN2
GND
PKC
VRO
SBAD
TEO
TEN
TEB
SEL
LDD
TNI
TPI
FPI
FNI
GMAD
VCC
RFGC
MDI
2VRO
I(3/4)
I(1/4)
I(3/4)
I(1/4)
31
CDC-R237
IC151 SAA6579T-T (MAIN Board)
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
TEST LOGIC AND OUTPUT
SELECTOR SWITCH
CL
T57
XOUT
XIN
GND
VDD
MODE
TEST
QUAL
RDDA
VREF
MUX
GND
VP1
VDD
SCOUT
CIN
QUALITY BIT
GENERATOR
OSCILLATOR
AND
DIVIDER
RECONSTRUCTION
FILTER
57kHz
BANDPASS
(8TH ORDER)
CLOKED
COMPARATOR
COSTAS LCOP
VARIABLE AND
FIXED DIVIDER
FIXED DIVIDER
DIFFERENTIAL
DECODER
CLOCK REGENERATION
AND SYNC
REFERENCE
VOLTAGE
BIPHASE
SYMBOL
SYMBOL
DECODER
ANTI-
ALIASING
FILTER
32
CDC-R237
SECTION 5
EXPLODED VIEWS
Ref. No.
Part No.
Description
Remark
5-1. CHASSIS SECTION
Ref. No.
Part No.
Description
Remark
NOTE:
• The mechanical parts with no reference
number in the exploded views are not supplied.
• Items marked “*” are not stocked since
they are seldom required for routine service.
Some delay should be anticipated
when ordering these items.
Some delay should be anticipated
when ordering these items.
• -XX and -X mean standardized parts, so
they may have some difference from the
original one.
original one.
• Color Indication of Appearance Parts
Example :
KNOB, BALANCE (WHITE) ... (RED)
Parts Color Cabinet’s Color
• Accessories are given in the last of this
parts list.
R
R
The components identified by
mark 0 or dotted line with mark
0 are critical for safety.
Replace only with part number
specified.
mark 0 or dotted line with mark
0 are critical for safety.
Replace only with part number
specified.
1
3-249-414-01 LEVER (DFP POP)
2
3-251-492-01 SPRING (COIL/POP UP)
3
3-250-895-01 SCREW +B 2.6X6
4
3-251-066-01 PANEL, SUB
5
3-250-908-01 SHEET (DOOR CD)
6
3-251-089-01 SPRING, LOCK
7
3-250-286-01 LEVER, LOCK
8
3-250-551-01 SCREW (+PTP 2.6X4)
9
1-776-527-82 CORD (WITH CONNECTOR) (ISO) (POWER)
10
3-249-422-01 HOLDER (CD MECHA)
11
3-250-888-01 SCREW +P (2.6X4)
12
A-3274-791-A MAIN BOARD, COMPLETE
13
3-251-495-01 SCREW (2.6X8)
14
3-376-464-11 SCREW (+PTT 2.6X6), GROUND POINT
F901
1-532-982-11 FUSE (BLADE TYPE) (AUTO FUSE) 15A
TU101
1-693-611-11 TUNER UNIT
#1
7-685-792-09 SCREW +PTT 2.6X6 (S)
#2
7-682-150-01 SCREW +P 3X12
#3
7-685-793-09 SCREW +PTT 2.6X8 (S)
F901
#1
#2
#3
#1
#1
MG-930B-185
#1
#1
#1
#1
TU101
not
supplied
not
supplied
not
supplied
not supplied
not supplied
A
A
1
2
3
4
5
6
7
8
9
10
12
13
14
8
11
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