Sony MDX-C8970 Service Manual page 55

• MAIN BOARD IC500 MB90574APMT-G-214-BND (MASTER CONTROLLER)
Pin No. Pin Name
1 RE-IN0
2 RE-IN1
3 to 5 NCO
6 SYSRST
7 BUS- ON
8 VCC
9 DSP STP
10 NCO
11 CSV PLAY
12 FLS SI
13 FLS SO
14
FLASH-W
15
BEEP
16 CSV ON
17 DSP SI
18 DSP SO
19 DSP CLK
20 UNI SI
21 UNI SO
22 UNI CKIO
23 SD-IN
24
SIRCS
25
CSV-SI
26
CSV-SO
27
CSV-CKO
28
DSP RST
29 ST-MONO
30 DSP XMST
31
WIDE
32 NARROW
I/O
I
Jog dial pulse input of the rotary encoder (EN900)
(for VOLUME/BASS/TREBLE/BALANCE/FADER control)
I
O
Not used (open)
System reset signal output to the MD mechanism controller (IC501), SONY bus interface
O
(IC271) and liquid crystal display drive controller (IC701) "L": reset
Bus on/off control signal output to the MD mechanism controller (IC501), SONY bus interface
O
(IC271) and liquid crystal display drive controller (IC701) "L": bus on
—
Power supply terminal (+5V)
PLL clock output control signal to the CXD2727Q (IC300)
At "L" is output: fixed at "L" is PLCLK (pin *¡ of IC300 CXD2727Q)
O
At "H" is output: PLL clock signal output from the PLCLK (pin *¡ of IC300 CXD2727Q)
O
Not used (open)
O
Voice guide and DSP sound selection to the CSV mix switch (IC691) "L": voice guide mode
I Input terminal at the flash memory data write mode
O Output terminal at the flash memory data write mode
Internal flash memory data write mode detection signal input terminal "L": data write mode
I
Not used (fixed at "H" in this set)
O Beep sound drive signal output terminal
O CSV (IC801) power supply control output terminal "H": CSV power on
I Serial data input from the CXD2727Q (IC300)
O Serial data output to the CXD2727Q (IC300)
Serial data transfer clock signal output to the CXD2727Q (IC300) and liquid crystal display drive
O
controller (IC701)
I Serial data input from the SONY bus interface (IC271)
O Serial data output to the SONY bus interface (IC271)
Serial clock signal output to the MD mechanism controller (IC501), SONY bus interface (IC271)
I/O and liquid crystal display drive controller (IC701) or serial clock signal input from the MD
mechanism controller (IC501) (for SONY bus)
Station detector detect input from the FM/AM tuner unit (TU101)
I
Stop level for SEEK, BTM, etc. is determined SD is present at input of "H"
I
Sircs remote control signal input from the remote control receiver (IC910)
I
Serial data input from the CSV (IC801)
O
Serial data output to the CSV (IC801)
O
Serial data transfer clock signal output to the CSV (IC801)
O
Reset signal output to the CXD2727Q (IC300) "L": reset
FM stereo broadcasting detection signal input from the FM/AM tuner unit (TU101), or forced
I/O
monaural control signal output to the FM/AM tuner unit (TU101)
"L" is input in the FM stereo mode, or "L" is output in the forced monaural mode
Bit clock (BCK) and L/R sampling clock (LRCK) signal master/slave mode selection signal
O output to the CXD2727Q (IC300)
"L": master mode, "H": slave mode
IF band select signal output terminal "H": wide mode
In receiving FM signals, interference noise from adjacent stations is removed by narrowing the
O
IF band automatically in the tuner unit so as to raise the selectivity, but in this case, the distortion
may increase and accordingly, the IF band is widened forcibly
IF band select signal output to the FM/AM tuner unit (TU101) "H": narrow mode
O In receiving FM signals, interference noise from adjacent stations is removed by narrowing the
IF band automatically in the tuner unit so as to raise the selectivity
Description
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