Sony HD-XB4K Service Manual page 64

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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
TE 34 VOL-B
L 13942296513
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
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I/O
O LED driver output
– Ground
O
X'tall (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 DOOR 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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8
Function
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– 89 –
9 4 2 8
0 5 8 2 9 9 4 2 8
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9 9
9 9