Sony MCE-SV7, Service Manual

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39
MCE-SV7
•
MAIN BOARD IC401 M30620MAA-B53FP (SYSTEM CONTROLLER)
Pin No. Pin Name I/O Description
1 to 7 — — Not used (open)
8 BYTE I
External data bus line byte selection signal input “L”: 16 bits, “H”: 8 bits
Not used (fixed at “L”)
9 CNVSS —
To flash memory connector Not used (open)
10 — — Not used (fixed at “L”)
11
— — Not used (open)
12
RESET I Reset signal input from the tuner unit (ST-SV7)
13 X-OUT O System clock output terminal (16 MHz)
14 VSS —
Ground terminal
15
X-IN
I
System clock input terminal (16 MHz)
16 VCC — Power supply terminal (+5V)
17
NMI
I
Non-maskable interrupt input terminal (fixed at “H” in this set)
18
— — Not used (open)
19 SCOR I Subcode sync (S0+S1) detection signal input terminal Not used (open)
20 to 23
— — Not used (open)
24
BU PWM 3
O
RFDC PWM signal output terminal Not used (open)
25 — — Not used (open)
26
BU PWM 2
O
Tracking error PWM signal output terminal Not used (open)
27
— — Not used (open)
28 BU PWM 1 O Focus error PWM signal output terminal Not used (open)
29 IIC-CLK I/O
Communication data reading clock signal input or transfer clock signal output with the video CD
controller and tuner unit (ST-SV7)
30 IIC-DATA I/O
Communication data bus with the video CD controller and tuner unit (ST-SV7)
31 — — Not used
32
SQ-DATA-IN I Subcode Q data input from terminal Not used (open)
33
SQ-CLK O Subcode Q data reading clock signal output terminal Not used (open)
34 RTS1 — Not used
35 CD-DATA O
CD decode data output terminal Not used (open)
36 SENS I
Internal status (SENSE) signal input terminal Not used (open)
37 CD-CLK O
Serial data transfer clock signal output terminal Not used (open)
38 CD POWER O
Power on/off control signal output for the video and CD mechanism deck section
“L”: standby, “H”: power on
39
— — Not used (open)
40 HOLD O Automatic power control hold signal output terminal Not used (open)
41
— — Not used (fixed at “L”)
42 XLT O
Serial data latch pulse output to terminal Not used (open)
43
XRST
O
Reset signal output terminal Not used (open)
44 LOAD-IN O
Loading motor drive signal (load-in direction) output the motor driver (IC701)
45 LOAD-OUT O
Loading motor drive signal (load-out direction) output the motor driver (IC701)
46 OPEN I
Sub tray load in/out detect switch (S742) input “L”: sub tray is chucking position
47 CLOSE I Sub tray load in/out detect switch (S742) input “L”: sub tray slides out of chucking position
48
T-SENS1 I
Detection input from the disc tray 1 height sensor (IC731)
“H”: disc tray 1 position is chucking position
49
T-SENS2 I
Detection input from the disc tray 2 height sensor (IC732)
“H”: disc tray 2 position is chucking position