Sony MDX-M690, Service Manual

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MDX-M690
•
MAIN BOARD IC501 MB90574BPMT-G-322-BND (SYSTEM CONTROLLER)
Pin No. Pin Name I/O Description
1 to 4 NCO O Not used (open)
5 ATT O
Power amplifier muting on/off control signal output to the power amplifier (IC309) and audio line
muting on/off control signal output “H”: muting on
6
SYSRST O
Reset signal output to the MD mechanism controller (IC501) SONY bus interface (IC601)
“L”: reset
7 to 9 NCO O Not used (open)
10 EEP SIO I/O Two-way data EEPROM bus with the FM/AM tuner unit (TUX201)
11
EEP CKO O
EEPROM bus clock signal output to the FM/AM tuner unit (TUX201)
12 RX I Input terminal for UART transfer data when writing into internal flash memory data
13 TX O Output terminal for UART transfer data when writing into internal flash memory data
14
BUS- ON
O
Bus on/off control signal output to the MD mechanism controller (IC501), SONY bus interface
(IC601) and display controller (IC702) “L”: bus on
15 BEEP O Beep sound drive signal output terminal
16 TEL-ATT I Telephone muting signal input terminal “H”: muting on
17
UNISI
I Serial data input from the SONY bus interface (IC601)
18
UNISO
O Serial data output to the SONY bus interface (IC601)
19
UNICLK
I/O
Serial clock signal output to the MD mechanism controller (IC501), SONY bus interface (IC601)
and display controller (IC702) or serial clock signal input from the MD mechanism controller
(IC501)
20 to 23 NCO O Not used (open)
24 SIRCS
I
Sircs remote control signal input from the SIRCS controller (IC801)
25 to 30 NCO O Not used (open)
31
E-VOL-ATT
O
Pre amplifier muting on/off control signal output to the TDA7406T (IC305)
“L”: muting on
32 NCO O Not used (open)
33
VSS —
Ground terminal
34
C —
Connected to coupling capacitor for the power supply
35, 36 NCO O Not used (open)
37 SHIFT O Oscillation frequency shift signal output to the power controller (IC101)
38
DVCC —
Power supply terminal (+5V) (for D/A converter)
39
DVSS —
Ground terminal (for D/A converter)
40 FR_CTRL
O
Reference voltage control signal output for front panel open/close motor driver (IC651)
41 NCO O Not used (open)
42
AVCC
— Power supply terminal (+5V) (for A/D converter)
43
AVRH
I Reference voltage (+5V) input terminal (for A/D converter)
44
AVRL
I Reference voltage (0V) input terminal (for A/D converter)
45
AVSS
— Ground terminal (for A/D converter)
46 KEY-IN0 I
Key input terminal (A/D input) (LSW10, LSW13, LSW15, LSW18, LSW20, LSW22, S4, S10 to
S15) 6,
. m , TA, DISC –, DISC +, > M , Z , ENTER, LIST, MENU, SOUND, DSO,
EQ7 keys input
47 KEY-IN1 I
Key input terminal (A/D input) (LSW1,LSW2, LSW5 to LSW9, LSW11, LSW12, S2, S3, S7 to
S9) –, SOURCE, +, AF, REP 1, SHUF 2, 3, 5, 4, CLOSE, MODE, OFF, SCRL, DSPL PTY keys
input
48 RC-IN0 I Rotary remote commander key input terminal (A/D input)
49 NCO O Not used (open)
50 QUAL I Noise level detection signal input at SEEK mode (A/D input)
51 NCO O Not used (open)
52
MPTH
I Multi-path detection signal input from the RDS decoder (IC202) (A/D input)