Y IC502 MB90574PMT-G-264-BND (SYSTEM CONTROL) (MAIN BOARD)
Pin No.Pin NameI/OPin Description
1NILINot used (fixed at OL�)
Input terminal of whether a music is present or not is detected at auto music sensor
2AMSINI
OL�: music is not prOH�esent,: music is present Not used (f OL�)ixed at
Tape auto music sensor control signal output terminal
3AMSONO
OL� is output to lower the gain for audio level at FF/REW mode Not used (open)
Serial data latch pulse output for spectrum analyzer section to the liquid crystal
4SP LATO
display drive controller (IC701)
5ATTOAudio line muting on/off control signal output terminal OL�: muting on
System reset signal output to the MD mechanism controller (IC501), liquid crystal
6SYSRSTO
display drive controller (IC701) and SONY bus interfOL�: resetace (IC601)
Tape detection signal output terminal OL�: reverse side, OH�: forward side
7F/RO
Not used (open)
8VCCNPower supply terminal (+5 V)
9MTLINIAuto metal detection signal input terminal Not used (fOL�)ixed at
10E2PSIOI/OTwo-way data bus for tuner EEPROM with the FM/AM tuner unit (TUX201)
11E2PCKOOTuner EEPROM bus clock signal output to the FM/AM tuner unit (TUX201)
Input terminal at the flash memory data write mode
12FLS SIIFront panel open/close detection signal input terminal
OL� is input when the front panel is closed
Output terminal at the flash memory data write mode
13FLS SOO
Display serial data output to the liquid crystal display driver (IC901)
Bus on/off control signal output to the CD mechanism controller (IC5), liquid crystal
14BUS-ONO
display drive controller (IC701) and SONY bus interfOL�: bus onace (IC601)
15BEEPOBeep sound drive signal output terminal
16NCOONot used (open)
17UNISIISerial data input from the SONY bus interface (IC601)
18UNISOOSerial data output to the SONY bus interface (IC601)
Serial clock signal output to the CD mechanism controller (IC5), liquid crystal
19UNICKOO
display drive controller (IC701) and SONY bus interface (IC601)
Tuner wide/narrow select signal input terminal OL�: wideOH, �: narrow
20IFWIDTHI
Not used (fixOed at L�)
When the radio is tuned at the frequency to produce beats, shift the frequency of the
21SWSHIFTO
signal from the D/D converter so as to produce no beats.
22, 23NCOONot used (open)
24SIRCSISircs remote control signal input from the remote control receiver (IC951)
25DSPSIISerial data input from the CXD2726Q (IC805)
26DSPSOOSerial data output to the CXD2726Q (IC805)
Serial data transfer clock signal output to the CXD2726Q (IC805) and liquid crystal
27DSPCKOO
display drive controller (IC701)
PLL clock control signal output to the CXD2726Q (IC805)
28DSPPLLOAt OL� is output: fOiLxed a� is PLCLK (pin t ia of IC805 CXD2726Q )
At OH� is output: PLL clock signal output to the PLCLK (pin ia of IC805 CXD2726Q)
Bit clock (BCK) and L/R sampling (LRCK) signal master/slave mode selection signal
29DSPMSTO
output to the CXD2726Q (IC805) OL�: master mode, OH�: slave mode
30NCOONot used (open)
Pre amplifier muting on/off control signal output to the electrical volume (IC301)
31VOLATTO
OL�: muting on
32TU ATTOMuting on/off control signal output of the FM/AM tuner signal OL�: muting on
33VSSNGround terminal
34CNConnected to coupling capacitor for the power supply
35DSPLATOSerial data latch pulse output to the CXD2726Q (IC805)
36DSPRSTOReset signal output to the CXD2726Q (IC805) OL�: reset
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ACEC
