TC-TX101 - Sony Audio Service Manual (repair manual). Page 17

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Note:
• All capacitors are in 
µ
F unless otherwise noted.  pF: 
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in 
 and 
1
/
4
 
W or less unless otherwise
specified.
: nonflammable resistor.
: fusible resistor.
: panel designation.
 B+
: B+ Line.
 B–
: B- Line.
: adjustment for repair.
• Voltage is dc with respect to ground under no-signal
conditions.
no mark : PB (FWD)
(
) : REC (FWD)
• Voltages are taken with a VOM (Input impedance 10 M
).
Voltage variations may be noted due to normal production
tolerances.
• Signal path.
: PB
: REC
TC-TX101
• IC Block Diagrams
IC01, 09 
µ
PC4570H
IC1A LB1641
IC02 CXA1101P
1 2
4
5
6
7
8
3
VF
VF
DET
DET
REC IN
VCC
PB IN
ON/OFF
LINE OUT
REC OUT
REC IN
PB IN
REC/PB
LINE OUT
REC OUT
16 15
13 12
11
10
9
14
1
2
3
4
5
6
7
8
9
10
GND
MOTOR
DRIVE
NOISE
FILTER
CLAMP
FWD.IN
REV.IN
VCC 1
VCC 2
NOISE
FILTER
MOTOR
DRIVE
MOTOR
DRIVE
MOTOR
DRIVE
T.S.D
O.C.P
FWD/REV/STOP
CONTROL LOGIC
1
2 3
4
5 6 7
8
9
OUT1
–IN1
+IN1
VEE
+IN2
–IN2
OUT2
VCC
VCC
IC03 NJM4558L
+ –
6
7
5
8
B
+
2
1
3
4
A
A OUT
A IN–
A IN+
VEE
VCC
B OUT
B IN–
B IN+
Note: The components identified by mark 
!
 or dotted line
with mark 
!
 are critical for safety.
Replace only with part number specified.
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