Technics SX-PX552 Service Manual page 57

C
CPL CIRCUIT
+5IP
C1
CN1 6.3V100
+5IP 1
DATA 2
TO
MAIN
SCK 3
CN3
E 4
5M1 5
R5 470
R6 220
R7 220
R8 470
CN4
SUMR 1
SUML 2
TO
E 3
MAIN
VOLR 4
CN2
VOLL 5
------ 6
3
2 2
1
UNLESS OTHERWISE SPECIFIED:
SWITCHES ARE EVQ21507K,
DIODES ARE MA165TA5.
IC1
M37471M2196S
(8BIT MICROCOMPUTER)
SW0
SW1
+5IP
22 VDD SW2
C2
0.1
21 VSS SW3
X1
EF0MC4004T5
19 XIN SW4
R1
4.7K
20 XOUT SW5
R2 0 R3 0
25 RST SW6
C3
0.022
R4 100
18 VREF SW7
C4
6.3V100
CM0
10 ID
CM1
5 SIN
4 SOUT CM2
3 CLK
CM3
29 CNTR1
+5IP
R11
CM4
100K
11 ADD
C7
0.1
CM5
VR2
QRVG25P01B53
3
1
SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
+5IP
23
24
42
R15 10K
1
R16 10K
26
R17 10K
27
R18 10K
28
R19 10K
2
Q2
2SA830STPB
9
R21 10K
8 Q3
2SA830STPB
R22 10K
7
Q4
2SA830STPB
R23 10K
6
Q5
2SA830STPB
R24 10K
17
Q6
2SA830STPB
R25 10K
16
34 A
35 B
A
36 C
37 D
+5IP
38 E
IC2
39 F
HD74LS07P
40 G (HEX BUFFERS)
41 H 14 12
VCC
15 I
14 J
GND
13 K
7 13
12 L
30
A
31
32
33
B C D E F
R26 R27 R28 R29 R30 R31
100 100 100 100 100 100
10 8 6 4 2
11 9 5 3 1
B C D E F