Read Sony MDX-C8970R Service Manual online
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MAIN BOARD IC701 HD6432355A08F (LIQUID CRYSTAL DISPLAY DRIVE CONTROLLER)
Pin No.
Pin Name
I/O
Description
1, 2
PG3, PG4
O
Not used (open)
3
VSS
—
Ground terminal
4
NC
—
Not used (open)
5
VCC
—
Power supply terminal (+5V)
6 to 9
PC0 to PC3
O
Not used (open)
10
VSS
—
Ground terminal
11 to 14
PC4 to PC7
O
Not used (open)
15 to 18
PB0 to PB3
O
Not used (open)
19
VSS
—
Ground terminal
20 to 23
PB4 to PB7
O
Not used (open)
24 to 27
PA0 to PA3
O
Not used (open)
28
VSS
—
Ground terminal
29 to 32
PA4/IRQ4 to
PA7/IRQ7
O
Not used (open)
33
SP-LAT
I
Serial data latch pulse input for spectrum display from the master controller (IC500)
“H” active
“H” active
34
P66/IRQ2
O
Not used (open)
35, 36
VSS
—
Ground terminal
37
P65/IRQ1
O
Not used (open)
38
BUS-ON
I
Bus on/off control signal output from the master controller (IC500)
“L”: bus on
“L”: bus on
39
VCC
—
Power supply terminal (+5V)
40
CD/MD
I
Setting terminal for the internal mechanism CD or MD
“L”: CD, “H”: MD (fixed at “H” in this set)
“L”: CD, “H”: MD (fixed at “H” in this set)
41 to 43
PE1 to PE3
O
Not used (open)
44
VSS
—
Ground terminal
45
TIR IND
O
LED drive signal output of the TIR indicator (LED705) “H”: LED on
46, 47
PE5, PE6
O
Not used (open)
48
MD LOCK
I
Mini-disc lock detection signal input from the MD mechanism controller (IC501)
“H”: lock CLV lock status output in test mode
“H”: lock CLV lock status output in test mode
49
BU-IN
I
Battery detect signal input from the SONY bus interface (IC271) and battery detect circuit
“L” is input at low voltage
“L” is input at low voltage
50
LINK-OFF
O
Link on/off control signal output for the SONY bus “L”: link on, “H”: link off
Not used (open)
Not used (open)
51
PD2
O
Not used (open)
52
ILL-ON
O
Power on/off control signal output of the illumination LED “H”: power on
53
VSS
—
Ground terminal
54
DOOR-SW
I
Front panel open/close detection signal input “L” is input when the front panel is closed
55
NCO
O
Not used (open)
56
PD6
O
Not used (open)
57
BOOT
I
Serial data input at the flash memory writing mode “L” is input when writing change
58
VCC
—
Power supply terminal (+5V)
59
NCO
O
Not used (open)
60
TX/FL-SO/
LCDDATA
O
Display serial data output to the liquid crystal display driver (IC900, 920)
Output terminal for UART transfer data when writing into internal flash memory data
Output terminal for UART transfer data when writing into internal flash memory data
61
SP-SI
I
Spectrum analyzer display serial data input from the CXD2727Q (IC300)
62
RX
I
Input terminal for UART transfer data when writing into internal flash memory data
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