Display Board - Sony STR-DE400 Service Manual

– VIDEO Board –
IC203 NJM2279D
20kΩ
20kΩ
20kΩ
– DISPLAY Board –
IC100 PT6315
LED1
1
LED2
2
LED3 3
LED4
4
OSC OSC
5
DOUT 6
DIN 7
Serial
interface
CLK
8
STB
9
KEY1
10
KEY2 11
12 13
14
13 12
1 2 3
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)
10
11
6dB Amp
6.3dB
20kΩ
4.14kΩ
6dB Amp
6.3dB
20kΩ
4.45kΩ
4.14kΩ
4
38 37 36
Multiplexed driver
segment driver
14 15 16 17 18 19 20
STR-DE400
9 8
75Ω Driver
75Ω
4.45kΩ
75Ω Driver
75Ω
5 6 7
35 34
SEG19/GRID10
33
32 SEG18/GRID11
SEG17/GRID12
31
30 VEE
SEG16/KS16
29
SEG15/KS15
28
27 SEG14/KS14
SEG13/KS13
26
SEG12/KS12
25
SEG11/KS11
24
SEG10/KS10
23
21 22
35