Sony HCD-D390 - Compact Audio And Video System Service Manual page 60

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