Sony HCD-GX8000, Service Manual

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49
HCD-GX8000/RG77
7-27. IC PIN FUNCTION DESCRIPTION
•
MAIN BOARD IC501 M30620MCN-A00FP (SYSTEM CONTROLLER (CD MECHANISM CONTROL))
Pin No. Pin Name I/O Description
1 NO-USE —
Not used
2 STEREO I FM stereo detection signal input from the tuner unit “L”: stereo
3 TUNED I
Tuning detection signal input from the tuner unit “L”: tuned
4 SIRCS I
Remote control signal input
5 to 7 SUR1 to SUR3 O Surround signal processor control signal output terminal Not used
8, 9 GND —
Ground terminal
10 XC-IN I
Sub system clock input terminal (32.768 kHz)
11 XC-OUT O Sub system clock output terminal (32.768 kHz)
12 RESET I
System reset signal input from the reset signal generator “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
13 X-OUT O
Main system clock output terminal (16 MHz)
14 VSS — Ground terminal
15 X-IN I
Main system clock input terminal (16 MHz)
16 VCC —
Power supply terminal (+3.3V)
17 NMI I Non-maskable interrupt input terminal
18 NO-USE —
Not used
19 SCOR
I Subcode sync (S0+S1) detection signal input from the digital signal processor
20 AC-CUT I AC off detection signal input from the reset signal generator “L”: AC cut checked
21 ST-MUTE O
Tuner muting on/off control signal output “H”: muting on
22 ST-CE O
PLL chip enable signal output to the tuner unit
23 ST-DOUT O PLL serial data output to the tuner unit
24 PWM3 O
RFDC PWM signal output to the RF amplifier (for CD-RW)
25 ST-DIN I
PLL serial data input from the tuner unit
26 PWM2 O PWM signal output to the RF amplifier (for CD-RW)
27 ST-CLK O
PLL serial data transfer clock signal output to the tuner unit
28 PWM1 O
Focus servo drive PWM signal output to the RF amplifier (for CD-RW)
29 IIC-CLK I/O
Communication data reading clock signal input or transfer clock signal output with the fluorescent
indicator tube driver
30 IIC-DATA I/O
Communication data bus with the fluorescent indicator tube driver
31 TXD1 —
Not used
32 SQ-DATA I Subcode Q data input from the digital signal processor
33
SQ-CLK
O
Subcode Q data reading clock signal output to the digital signal processor
34
SENS I Internal status detection monitor input from the digital signal processor
35 CD-DATA O Serial data output to the digital signal processor
36 XLT
O Serial data latch pulse output to the digital signal processor
37 CD-CLK O
Serial data transfer clock signal output to the digital signal processor
38 CD-POWER O Power on/off control signal output for the CD section “H”: power on
39 CLOCK-OUT O
Clock (32.768 kHz) signal output terminal (for test mode)
40 LD ON O
Laser diode on/off control signal output to the RF amplifier “L”: laser diode on
41 GC RESET I Reset signal output to the fluorescent indicator tube driver “L”: reset
42 NO-USE —
Not used
43 XRST
O Reset signal output to the digital signal processor and motor/coil driver “L”: reset
44 LOAD-IN O Turn motor drive signal output
45 LOAD-OUT O
Turn motor drive signal output
46 OPEN-SW I
Disc tray open detection signal input terminal “L”: disc tray open
47 CLOSE-SW I
Disc tray close detection signal input terminal “L”: disc tray close
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