Sony CDX-V7800X, Service Manual

Page: 21 / 56

21
• IC801 µPD17708GC-618-3B9 (SYSTEM CONTROL)
Pin No. Pin Name I/O Pin Description
1 SIRCS I Wireless remote commander input
2 SELF SW I Self switch input
3 DOOR I Front panel open/close detection input
4 NOSE I Front panel with/without detection input
5 NC — Not used. (Connect to ground)
6 SYSRST O Rest output for slave microcomputer IC.
7 DOOR IN O CD door open/close detection output
8 MUTE O Mute on/off control output
9, 10 NC — Not used. (Open)
11 BAND-SW I Initial setting switch input
12 AREA1-SW I Destination check input 1 (Fixed at L in this set)
13 AREA2-SW I Destination check input 2 (Fixed at H in this set)
14 NC — Not used. (Open)
15 PARK I Parking signal detection input
16 TEL MUTE I Attenuator on/off control input
17 POWER IC ON O Power supply control output to power amplifier IC.
18 SEEK O SEEK output
19 AMP MUTE O Output control to power amplifier IC.
20 NC — Not used. (Open)
21 GND3 — Ground
22 NC — Not used. (Connect to ground)
23, 24 KEYIN2, 1 I Key input of A/D converter.
25 ROT-IN I Rotary commander A/D value input
26 S-METER I S-meter input
27 TEST-SW I Initial setting switch input (Fixed at H in this set)
28 AM IFC I AM center frequency counter input
29 FM IFC I FM center frequency counter input
30 VDD2 — Power supply pin
31 VCOH FM I FM input at VCO is FM.
32 VCOL AM I AM input at VCO is AM.
33 GND2 — Ground
34 NC — Not used. (Open)
35 EO1 PDOUT O Error out output
36 TEST0 I Fixed at L in this set.
37, 38 NC — Not used. (Open)
39 LCL/DX O LOCAL/DX select output
40 BEEP O Beep output
41 ACC IN I Accessory input
42, 43 RE1, 2 I Rotary encoder input 1, 2
44 NC — Not used. (Open)
45 MONO O Monaural output (H: Monaural, L: Stereo)
46 SD I SD input
47 VOL CE O Chip enable output for Electric volume IC.
48 VOL CLK O Cloch output for Electric volume IC.
49 VOL DATA O Data output for Electric volume IC.
50 NC — Not used. (Open)
51 FM ON O FM system power control output (H: FM ON)
52 AM ON O AM system power control output (H: AM ON)
53 LCD CE O Chip enable output for LCD driver IC.
54 ILL ON O Front panel backlight control output (H: Illumination ON)
55 NC — Not used. (Connect to ground)
56, 57 NC — Not used. (Open)
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