Sony STR-K1000P Service Manual page 34

STR-K1000P
– DISPLAY Board –
IC100 PT6315
LED1
1
LED2
2
LED3 3
LED4
4
OSC 5 OSC
DOUT 6
DIN
7
Serial
interface
CLK
8
STB
9
KEY1 10
KEY2 11
12
IC101 MC74ACT08N
1A
1
1B
2
1Y 3
2A 4
2B
5
6
2Y
GND
7
34
44 43 42 41 40
Grid driver
Command decoder
Display memory
24 bits x 12 words
Timing generator
key scan
Key data memory
(2 x 16 bits)
13
VCC
14
13 4B
4A
12
11
4Y
10
3B
9 3A
3Y
8
39 38 37 36
Multiplexed driver
segment driver
14 15 16 17 18 19
35 34
SEG19/GRID10
33
32 SEG18/GRID11
SEG17/GRID12
31
30 VEE
SEG16/KS16
29
28 SEG15/KS15
27
SEG14/KS14
26 SEG13/KS13
25 SEG12/KS12
SEG11/KS11
24
SEG10/KS10
23
20 21 22