Sony HCD-GRX8 Service Manual page 65

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• IC601 DISPLAY CONTROL ( TMP87CM74AF)
Pin Name
Pin No.
1 to 6 LED3 to LED8
7 VSS
8 X OUT
9 X IN
10 RESET
11 LED9
12 LED10
13 TEST
14 to 18 LED11 to LED15
19 VOL A
20 VOL B
21 JOG A
22 JOG B
23 SCL
24 SDA
25 L. SEL
26 to 29 KEY 0 to KEY 3
30 MODEL
31 (LED 16 OPEN)
32 L + R
33 SIRCS
34 to 37 SPEANA 1 to SPEANA 4
38 VASS
39 VAREF
40 VDD
41 to 53 GR 1 to GR13
54 to 77 SEG 1 to SEG 24
78 VKK
79 LED 1
80 LED 2
• Abbreviation
FL : Fluorescent indicator tube
I/O
O LED driver output
– Ground
O
X'tall (8MHz)
I
I Reset signal input from main controller
O
LED driver output
O
I Connected ground
O LED driver output
I
Rotary encoder (S602) pulse input
I
I
Rotaly encoder (S601) pulse input
I
O Serial clock input from master controller
O Serial data input from master controller
O LED select signal output
I Key input
I Version select signal input
– LED driver output (Not used)
I Spectrum analyzer (high frequency) input
I Remote commander signal input
I Spectrum analyzer input
– Ground
I Analog reference voltage input
– Power supply (+5V)
O FL gride signal output
O FL segment signal output
– Power supply (–25V) for FL segment signal output
O
LED driver output
O
– 96 –
Function