Technics SX-PX554 Service Manual page 54

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C
CPL CIRCUIT
+5IP
CN1
+5IP 1
DATA 2
TO
MAIN
SCK 3
CN3
E 4
5M1 5
CN4
SUMR 1
SUML 2
TO
E 3
MAIN
VOLR 4
CN2
VOLL 5
------ 6
UNLESS OTHERWISE SPECIFIED:
SWITCHES ARE EVQ21507K,
DIODES ARE MA165TA5.
IC1
M37471M2196S
(8BIT MICROCOMPUTER)
+5IP
22
C2
0.1
21
X1
4MHz
19
R1
4.7K
20
R2 R3
0 0
25
C3
0.022
C1
R4
6.3V100
100
18
C4
6.3V100
10
R5
470
5
R6
220
4
R7
220
3
R8 470
29
+5IP
R11
100K
11
C7
0.1
VR2
QRVG25P01B53
3 3
2 2
1 1
World of free manuals
09/08/2012
+5IP
SW0 23
SW1 24
VDD SW2 42
R15
10K
VSS SW3 1
R16
10K
XIN SW4 26
R17
10K
XOUT SW5 27
R18
10K
RST SW6 28
R19
10K
VREF SW7 2
CM0 9
ID
R21
10K
CM1 8
SIN
R22
10K
SOUT CM2 7
CLK
R23
10K
CM3 6
CNTR1
R24
10K
CM4 17
ADD
R25
10K
CM5 16
SEG0 34 A
SEG1 35 B
SEG2 36 C
SEG3 37 D
SEG4 38 E
SEG5 39 F
SEG6 40 G
SEG7 41 H
SEG8 15 I
SEG9 14 J
SEG10 13 K
SEG11 12 L
IC2
SEG12 30
HD74LS07P
SEG13 31
(HEX BUFFERS)
SEG14 32
SEG15 33
Q2
2SA830STPB
Q3
2SA830STPB
Q4
2SA830STPB
Q5
2SA830STPB
Q6
2SA830STPB
A B C D E
R26 R27 R28 R29
+5IP
100 100 100 100
14 12 10 8 6 4
VCC
GND
7 13 11 9 5 3
A B C D E
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F
R30 R31
100 100
2
1
F