Panel Board - Sony HCD-XB4 Service Manual

PANEL BOARD IC601 TMP87CH74 (DISPLAY CONTROL)
Pin No. Pin Name I/O
1-6 LED3-LED8 O
7 VSS –
8 X-OUT O
9 X-IN I
10 RESET I
11 LED 9 O
12 LED10 O
13 TEST I
14-19 LED11-LED19 O
20 VOL-A I
21 DOOR SW I
22 JOG-A I
23 CLOCK I
24 DATA I
25 LED SELECT O
26 MODEL I
27-30 KEY1-KEY4 I
31 SPEANA-3 I
32 L + R I
33 SIRCS I
34 VOL-B I
35 JOG-B I
36 SPEANA-1 I
37 SPEANA-2 I
38 VASS –
39 VAREF I
40 VDD –
41 — –
42-56 GR1-GR15 O
57-77 SEG1-SEG77 O
78 VKK –
79, 80 LED1-LED2 O
LED driver output
Ground
X'tall (8MHz)
Reset signal input from main controller
Connected ground
LED driver output
Rotary encoder (S701 VOLUME) pulse input
DOOR SW (S651) ON/OFF signal input
Rotaly encoder (S711 AMS) pulse input
Serial clock input from main controller
Serial data input from main controller
LED select signal output
Version select signal input
Key input
Connected ground
Spectrum analyzer (high frequency) input
Remote commander signal input
Rotary encoder (S701 VOLUME) pulse input
Rotary encoder (S711 AMS) pulse input
Spectrum analyzer (Low frequency) input
Spectrum analyzer (Middle frequency) input
Ground
Analog reference voltage input
Power supply (+5V)
Not used
FL gride signal output
FL segment signal output
–30V driving power for FL
LED driver output
– 85 –
Function