Technics SL-EH560 Service Manual page 74

SCHEMATIC DIAGRAM-4
:POSITIVE VOLTAGE LINE
Q402 1V
2SC3311ATA
INTERFACE
R440
47K
D403
1.4V
MA165TA
0.5V
Q403
2SC3311ATA
INTERFACE
Q401
UN4214TA
R402
100K
RESET
C401
4.7V
50V3.3
0V 10K
47K
X401
(8MHz)
1
2
R401
680
3
2.1V
21 20
1.4V
P-P
F=8MHz
22 23
0V
(4.5V)
R406
100
C
R436
4.7K
0.2V
D404
MA165TA
R441
0.5V
4.7K
0V
Q404
2SC3311ATA
INTERFACE
A B
2V 4.7V 4.8V 0V 4.7V
19 18 17 16 15 14 13
PLAY
3.3V
1.8V
P-P
0V
T 13.3ms.
F=8MHz
T
24 25 26 27 28 29 30
0V 4.5V 0V 0V 4.8V 4.8V 0V
(0V) (4.8V)
R452
3.3K
E D
R453
3.3K
R454
3.3K
C D E
7.8V
4.8V
PLAY
PLAY
5V
T 26.6ms.
0V
T 26.6ms.
A
A
B
(0.2V) (0.2V) (4.8V) (3.3V)
4.8V 3.3V 0V
8 9 10
C
Y3 A3 Y4
A
GND Y2 A2
7 6 5
B
IC452
TC74HCT7007A
3.3V TO 5V
CONVERTER
A
B
A B C
1.4V 0.4V 1V 3.3V 3.3V 0V 4.8V
12 11 10 9 8 7 6
PLAY PLAY
PLAY
5V 5V
0V 0V
F=75Hz
T 20ms.
20ms.
31 32 33 34 35 36 37
5V 5V
A D
3.3V
PLAY
5V
3.3V
0V
0V
0V
F=75Hz
F=75Hz
B C D
0V 0V 0V 4.8V
11 12 13 14
A4 Y5 A5 Vcc
Y1 A1 Y0 A0
4 3 2 1
0V 0V
B
D402
R435
MA165TA
100
C
R434
100
D
R449 R448
1K 1K
E
A
D406
MA165TA
R433 10K
IC451
M38504M6200F
D407
SYSTEM CONTROL
MA165TA
(0.2V)
4.8V 1.6V 4.8V 4.8V
5 4 3 2 1
PLAY
5V
5V
0V
0V
T 26.6ms.
38 39 40 41 42
4.8V 4.8V 4.8V 4.8V
R424
4.7K
R432
4.7K
C414
470P
C B
C413
470P
R422
10K
R421
10K
B A