Sony MDX-C7970/C7970R Service Manual page 55

• MAIN BOARD IC700 (MASTER CONTROLLER)
MB90574PFV-G-186-BND (MDX-C7970R)
Pin No. Pin Name
1 to 7 NC
8 VCC
9 PLL SI
10 PLL SO
11 PLL CKO
12 DOOR-SW
13 LCD SO
14 LCD CKO
15
BEEP
16 DBMOD2
17 NOSE-SW
18, 19 NC
20 UNI SI
21 UNI SO
22 UNI CKIO
23 NC
24
SIRCS
25 PACK-IND
26 VOL SO
27 VOL CKO
28 DSTSEL0
29 SYSRST
30 DSTSEL1
31 DBMOD1
32 TESTIN
33
VSS
34 C
35 NS-MASK
36 BUS- ON
37 AD-ON
38 DVCC
39 DVSS
40 LCDANG
41 VOL CE
42 AVCC
MB90574PFV-G-185-BND (MDX-C7970)
I/O
O
Not used (open)
—
Power supply terminal (+5V)
I
PLL serial data input terminal Not used (open)
O
PLL serial data output terminal Not used (open)
O
PLL serial data transfer clock signal output terminal Not used (open)
Front panel block remove/attach detection signal input terminal
I
"L": front panel is attached
O Serial data output to the liquid crystal display driver (IC501)
O Serial data transfer clock signal output to the liquid crystal display driver (IC501)
O Beep sound drive signal output terminal
O
D-BASS mode control signal output terminal Not used (open)
Front panel open/close detection switch (S901) input
I
"L" is input when the front panel is closed
O
Not used (open)
I Serial data input from the SONY bus interface (IC600)
O Serial data output to the SONY bus interface (IC600)
Serial clock signal output to the MD mechanism controller (IC501) and SONY bus interface
I/O
(IC600) or serial clock signal input from the MD mechanism controller (IC501) (for SONY bus)
O
Not used (open)
I
Sircs remote control signal input from the remote control receiver (IC502)
LED drive signal output of the MD disc slot illumination and 6 indicator (LED891, LSW890)
O
"H": LED on "H" is output to turn on LED when front panel is opened
O Serial data output for the electrical volume Not used (open)
O Serial data transfer clock signal output for the electrical volume Not used (open)
Destination setting terminal
I
(Except German models: fixed at "H", German model: fixed at "L")
System reset signal output to the MD mechanism controller (IC501) and SONY bus interface
O
(IC600) "L": reset
Destination setting terminal
I
(US, Canadian models: fixed at "H", E model: fixed at "L")
O D-BASS mode control signal output terminal Not used (open)
I Setting terminal for the test mode "L": test mode, Normally: fixed at "H"
—
Ground terminal
—
Connected to coupling capacitor for the power supply
Discharge control signal output for the noise detection circuit "H": discharge
O
Used for the MDX-C7970R only (MDX-C7970: Not used (open))
Bus on/off control signal output to the MD mechanism controller (IC501) and SONY bus
O
interface (IC600) "L": bus on
A/D converter power control signal output terminal
When the KEYACK (pin &ª) that controls reference voltage power for key A/D conversion input
O
is active, "L" is output from this terminal to enable the input
—
Power supply terminal (+5V) (for D/A converter)
—
Ground terminal (for D/A converter)
View field angle control signal is output when front panel is fully opened
O
"H": front panel is fully opened
O Chip enable signal output for the electrical volume Not used (open)
— Power supply terminal (+5V) (for A/D converter)
Function
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