Sony XR-C7500RX Service Manual page 36

MAIN BOARD IC600 MB90574BPMT-G-265-BND (SYSTEM CONTROLLER)
Pin No. Pin Name
1 NC
2 AMSIN
3 AMSON
4 SA LAT
5 ATT
6 SYSRST
7 F/R
8 VCC
9 TAPE ATT
10 T. ROM-SDA
T. ROM-SCL
11
12 RX
13 TX
14 BUS-ON
15
BEEP
16 NC
17 UNISI
18 UNISO
19 UNICKO
20 IF-BW
21 SW SHIFT
22, 23 NC
24 SIRCS
25
DSPSI
26
DSPSO
27
DSPCKO
28
DSPPLL
29
DSPMST
30 NC
31 VOLATT
32 TUMUTE
33
VSS
34 C
36
I/O
O
Not used (open)
Whether a music is present or not from CXA2510AQ (IC250) is detected at auto music sensor
I
"L": music is present, "H": music is not present
Tape auto music sensor control signal output to the CXA2510AQ (IC250)
O
"L" is output to lower the gain for audio level at FF/REW mode
Serial data latch pulse output for spectrum analyzer section to the liquid crystal display drive
O
controller (IC800)
O Audio line muting on/off control signal output terminal "H": muting on
System reset signal output to the liquid crystal display drive controller (IC800) and SONY bus
O
interface (IC500) "L": reset
Forward/reverse direction control signal output to the CXA2510AQ (IC250)
O
"L": reverse direction, "H": forward direction
—
Power supply terminal (+5V)
Tape muting on/off control signal output to the CXA2510AQ (IC250) "H": muting on
O
Active at ATA, FF/REW mode
I/O Two-way data bus for tuner EEPROM with the FM/AM tuner unit (TUX1)
I/O
Two-way bus clock signal for tuner EEPROM with the FM/AM tuner unit (TUX1)
Input terminal at the flash memory data write mode
I
Front panel open/close detection signal input terminal
"L" is input when the front panel is closed
Output terminal at the flash memory data write mode
O
Display serial data output to the liquid crystal display driver (IC901)
Bus on/off control signal output to the liquid crystal display drive controller (IC800) and SONY
O
bus interface (IC500) "L": bus on
O Beep sound drive signal output terminal
O
Not used (open)
I Serial data input from the SONY bus interface (IC500)
O Serial data output to the SONY bus interface (IC500)
Serial clock signal output to the liquid crystal display drive controller (IC800) and SONY bus
O
interface (IC500)
Tuner wide/narrow select signal input terminal "L": wide, "H": narrow
I
Not used (fixed at "L")
O Not used
O
Not used (open)
I Sircs remote control signal input from the remote control receiver (IC951)
I
Serial data input from the CXD2726Q (IC100)
O
Serial data output to the CXD2726Q (IC100)
Serial data transfer clock signal output to the CXD2726Q (IC100) and liquid crystal display drive
O
controller (IC800)
O
PLL clock control signal output terminal Not used (open)
Bit clock (BCK) and L/R sampling (LRCK) signal master/slave mode selection signal output
O
terminal "L": master mode, "H": slave mode Not used (open)
O
Not used (open)
Pre amplifier muting on/off control signal output to the electrical volume (IC10)
O
"L": muting on
O
Muting on/off control signal output of the FM/AM tuner signal "L": muting on
—
Ground terminal
—
Connected to coupling capacitor for the power supply Not used (open)
Description