Sony WX-GT77UI - Radio / CD, Руководство по обслуживанию

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WX-GT77UI/GT78UI/GT78UIM
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• IC Pin Function Description
MAIN BOARD (3/3) IC501 MB90F883AHPF-GE1-387A (SYSTEM CONTROL)
Pin No. Pin Name I/O Description
1 CYRIL_SEL I Cyril select signal input (L: No cyril select)
2 B-OUT_SEL I Black out setting signal input (L: No black out)
3 COL_SW I Key illumination initial color setting signal input (H: Blue)
4 ILLUMI_SEL I Key illumination voltage setting signal input (H: 10.4 V)
5
DOOR_SW I Front panel open detect signal input
6 DOOR_IND O Door indicator control signal output Not used in this set. (Open)
7 NOSE_SW I Front panel detach detect signal input
8 to 10 NCO O Not used. (Open)
11 RE_IN0 I Rotary encoder signal input 0
12 RE_IN1 I Rotary encoder signal input 1
13 X_OUT O Low speed operation clock signal output (32.768 kHz)
14 X_IN I Low speed operation clock signal input (32.768 kHz)
15 VCC – Power supply pin (+3.3 V)
16 VSS – Ground
17 C – Regulator reference capacitor connecting pin
18 UNISI I SONY-BUS data input
19 UNISO O SONY-BUS data output
20 UNISCK O SONY-BUS clock signal output
21 NCO O Not used. (Open)
22 I2C_SIO I/O I2C serial data input/output
23 I2C_SCK O I2C serial clock signal output
24 NCO O Not used. (Open)
25 ACC_IN I Accessory power supply detect signal input
26 TEL_ATT I Telephone attenuator detect signal input
27 ATT O Audio mute control signal output
28 BUS_ON O BUS ON signal output
29 SYS_RST O System reset signal output
30 CD_ON I CD mechanism servo power supply control request signal input
31 CDM_ON I CD mechanism deck power supply control request signal input
32 AVCC – A/D converter power supply pin (+3.3 V)
33 AVRH – A/D converter external reference power supply pin (+3.3 V)
34 RC_IN1 I Rotary commander shift key signal input 1
35 AVSS – Ground for A/D converter
36 NCO O Not used. (Open)
37 VSM I S meter voltage detect signal input
38 SA_IN I Spectrum analyzer DC input
39 KEY_IN1 I Key signal input 1
40 KEY_IN0 I Key signal input 0
41 RC_IN0 I Rotary commander key signal input 0
42, 43 NCO O Not used. (Open)
44 VSS – Ground
45 KEY_ACK0 I Key acknowledge detect signal input (Rotary commander)
46 KEY_ACK1 I Key acknowledge detect signal input (Front panel)
47 NCO O Not used. (Open)
48 LCD_CE O LCD driver chip enable signal output
49 LCD_SO O LCD driver serial data output
50 LCD_SCK O LCD driver serial clock signal output
51 MOD2 I Micon operation mode setting signal input (active: L)
52 MOD1 I Micon operation mode setting signal input
53 MOD0 I Micon operation mode setting signal input (active: H)
54 RESET I Reset signal input
55 AREA_SEL2 I Destination setting pin 2
56 AREA_SEL1 I Destination setting pin 1 (H: US model, L: E model)
57 AREA_SEL0 I Destination setting pin 0