Sony MDX-CA580 Service Manual page 46

• MAIN BOARD IC501 MB90574BPMT-G-266-BND (MASTER CONTROLLER)
Pin No. Pin Name
1 TUNON
2 ANT CUT
3 BUSON
4 to 6 NCO
7
ILLON
8 VCC
9 E2P SIO
E2P CKO
10
11 SYSRST
12 DOORSW
13 LCDSO
14 LCDCKO
15 LCDCE
16 BEEP
17 UNISI
18 UNISO
19 UNICKO
UNICKI
20
21 CD MD
22
FLASHW
23 NCO
24
SIRCS
25 to 28 NCO
29 DOORIND
30, 31 NCO
32 NS MASK
33
VSS
34 C
35 AD ON
36, 37 REIN0, REIN1
38 DVCC
39 DVSS
40, 41 NCO
42 AVCC
43 AVRH
46
I/O
Tuner system power supply on/off control signal output to the BA4908 (IC671)
O
"H": tuner power on
Tuner system power supply on/off control signal output terminal "H": tuner power on
O
Not used (open)
Bus on/off control signal output to the MD mechanism controller (IC501) and SONY bus
O
interface (IC701) "L": bus on
O Not used (open)
Power on/off control signal output of the illumination LED and liquid crystal display driver
O
(IC901) "H": power on
—
Power supply terminal (+5V)
I/O Two-way data E2P bus with the FM/AM tuner unit (TU1)
O
E2P bus clock signal output to the FM/AM tuner unit (TU1)
System reset signal output to the MD mechanism controller (IC501) and SONY bus interface
O
(IC701) "L": reset
I
Front panel open/close detection signal input "L" is input when the front panel is closed
O Serial data output to the liquid crystal display driver (IC901)
O Serial data transfer clock signal output to the liquid crystal display driver (IC901)
O Chip enable signal output to the liquid crystal display driver (IC901) "H" active
O Beep sound drive signal output to the power amplifier (IC611)
I Serial data input from the SONY bus interface (IC701)
O Serial data output to the SONY bus interface (IC701)
Serial clock signal output to the MD mechanism controller (IC501) and SONY bus interface
O
(IC701)
I
Serial clock signal input from the MD mechanism controller (IC501) (for SONY bus)
Setting terminal for the internal mechanism CD or MD
I
"L": CD, "H": MD (fixed at "H" in this set)
Internal flash memory data write mode detection signal input terminal "L": data write mode
I
Not used
O
Not used (open)
I
Sircs remote control signal input from the remote control receiver (IC951)
O
Not used (open)
LED drive signal output of the MD disc slot illumination and Z indicator (LED810, LSW810)
O
"H": LED on "H" is output to turn on LED when front panel is opened
O
Not used (open)
O
Discharge control signal output for the noise detection circuit "H": discharge
—
Ground terminal
—
Connected to coupling capacitor for the power supply
A/D converter power control signal output
O
When the KEYACK (pin uh) that controls reference voltage power for key A/D conversion input
is active, "L" is output from this terminal to enable the input
Dial pulse input of the rotary encoder (RE901)
I
(for VOLUME/BASS/TREBLE/BALANCE/FADER control)
— Power supply terminal (+5V) (for D/A converter)
—
Ground terminal (for D/A converter)
O
Not used (open)
— Power supply terminal (+5V) (for analog system)
I Reference voltage (+5V) input terminal (for A/D converter)
Description