Sony MDX-C8970, Руководство по обслуживанию

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