Sony CDX-GT527EE, Service Manual, Page: 31 / 46

31
CDX-GT527EE/GT570/GT570S
• IC Pin Description
IC501 MB90F045PF-G-9060-SPE1 (SYSTEM CONTROL) (MAIN BOARD (3/3))
Pin No. Pin Name I/O Pin Description
1 AREASEL0 I Destination setting pin (L: CDX-GT570/GT570S, H: CDX-GT527EE)
2 AREASEL1 I Destination setting pin (L: CDX-GT570/GT570S, H: CDX-GT527EE)
3 AREASEL2 I Destination setting pin (L: FM (50k)/MW (9k), H: FM (200k)/MW (10k))
4 AREASEL3 I Destination setting pin (Fixed at L in this set)
5 BEEP O Beep signal output to power amp IC.
6 COL_SEL I
Key illumination 2 colors select signal input (L: 1 color (CDX-GT570/GT570S),
H: 2 color (CDX-GT527EE))
7 NOSE_SW I Front panel detach detection signal input (L: with panel, H: without panel)
8 DIAG I Status signal input from power amp IC.
9 VOLATT O Attenuator control signal output to electronic volume IC.
10 CYRIL_SEL I
CYRIL select signal input (L: non CYRIL (CDX-GT570/GT570S),
H: CYRIL (CDX-GT527EE))
11 VSS — Ground
12 TUATT O Tuner mute control signal output
13 NSMASK O Noise mask signal output (CDX-GT527EE only)
14 NCO O Not used. (Open)
15 ILLUMI_SEL I Illumination voltage setting pin (L: illumination power supply 9 V)
16 NCO O Not used. (Open)
17 AUX_SW O Not used. (Open)
18, 19 NCO O Not used. (Open)
20 MG_SEL I Mechanism deck select signal input (L: MG-101TC)
21 B-OUT_SEL I
Black out select signal input (L: non black out (CDX-GT527EE),
H: black out (CDX-GT570/GT570S))
22 DIM_SEL I Dimmer select signal input (H: non auto dimmer)
23 VCC5 — Power supply pin (+3.3 V)
24 EEP_SIO I/O Serial data signal input/output for EEPROM communication.
25 EEP_CKO O Serial clock signal output for EEPROM communication.
26 AMPSTB O Standby signal output to power amp IC.
27 LCD_CE O Chip enable signal output to LCD drive IC.
28 LCD_SO O Serial data signal output to LCD drive IC.
29 LCD_CKO O Serial clock signal output to LCD drive IC.
30 RDSON O RDS ON signal output (CDX-GT527EE only)
31 RS_SEL I
Rear/sub switchable select signal input (L: non rear/sub switchable
(CDX-GT570/GT570S), H: rear/sub switchable (CDX-GT527EE))
32 SA_DATA O Data output for electronic volume IC spectrum analyzer.
33 I2C_CKO O I2C bus serial clock signal output
34 I2C_SIO I/O I2C bus serial data signal input/output
35 DAVDD — Power supply pin for A/D converter. (+3.3 V)
36 AVRH — External reference power supply pin for A/D converter. (+3.3 V)
37 DAVSS — Ground for A/D converter.
38 QUALITY I Noise detection signal input
39 VSM I S meter voltage detection signal input
40 KEYIN1 I Key signal input 1
41 KEYIN0 I Key signal input 0
42 VSS — Ground
43 RC_IN0 I Rotary commander key signal input
44 SA_IN I Spectrum analyzer signal input
45 SA_CKO O Spectrum analyzer clock signal output