Sony STR-K670P Service Manual page 30

STR-K670P
QQ
3 7 63 1515 0
– DISPLAY Board –
IC100 PT6315
LED1
1
LED2
2
3
LED3
LED4
4
OSC OSC
5
DOUT 6
TE
L 13942296513
DIN 7
Serial
interface
CLK
8
STB
9
KEY1 10
KEY2 11
12 13
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.
30
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44 43 42 41 40 39
Grid driver
Command decoder
Display memory
24 bits x 12 words
Timing generator
key scan
Key data memory
(2 x 16 bits)
IC101 TC74ACT08P
1A
1
1B
2
1Y 3
2A 4
2B
5
x ao
2Y 6
y
GND 7
i
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8
38 37 36 35
Multiplexed driver
Q Q
3 6 7 1 3
segment driver
14 15 16 17 18 19 20
VCC
14
13 4B
4A
12
11
4Y
10
3B
u163
9 3A
8 3Y
.
2 9 9 4 2 8
34
SEG19/GRID10
33
32 SEG18/GRID11
31 SEG17/GRID12
30 VEE
1 5 0 5 8 SEG16/KS16 2 9 9 4
29
28 SEG15/KS15
27 SEG14/KS14
26 SEG13/KS13
25 SEG12/KS12
SEG11/KS11
24
SEG10/KS10
23
21 22
m
co
9 9
2 8 9 9