4-10. Ic Pin Function Description - Sony TA-FA30ES Service Manual

• IC Block Diagrams
IC700 µPC1237HA (SP TM BOARD)
OVER LOAD DET
V ON
CC
F/F
MUTE
OFFSET DET
LATCH/
AUTORESET
AC OFF
DET
V
CC
1 2 3 4 5 6 7 8
IC903 BA6208 (PANEL BOARD)
MOTOR
SWITCH
DRIVE
MOTOR
SWITCH
DRIVE
REG
1 2 3 4 5 6 7 8 9
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4-10. IC PIN FUNCTION DESCRIPTION

PANEL BOARD IC901 TMP47C200BN-H351 (SYSTEM CONTROLLER)
Pin No. Pin Name I/O
1 RCL O
Serial clock signal output to the EEPROM (IC902)
2 RDT I/O Two-way data bus with the EEPROM (IC902)
Volume motor drive signal output to the BA6208 (IC903) (for volume down direction)
3 VDW O
"H" active
Volume motor drive signal output to the BA6208 (IC903) (for volume up direction)
4 VUP O
"H" active
5 CD O Function relay (for CD) drive signal output terminal "H": relay on (CD on)
6 MUT O
Muting control signal output terminal "H": muting on Not used (pull up)
7 AUX O Function relay (for AUX) drive signal output terminal "H": relay on (AUX on)
8 — —
Not used (fixed at "L")
9 T2 O Function relay (for TAPE2/MD) drive signal output terminal "H": relay on (TAPE2/MD on)
10 T1 O Function relay (for TAPE1/DAT) drive signal output terminal "H": relay on (TAPE1/DAT on)
11 SW0 I
Input selector switch (S903) input terminal "H": TAPE1/DAT, "L": other function
12 SW1 I Input selector switch (S903) input terminal "H": TAPE2/MD, "L": other function
13 SW2 I Input selector switch (S903) input terminal "H": AUX, "L": other function
14 SW3 I
Input selector switch (S903) input terminal "H": CD, "L": other function
15 SW4 I Input selector switch (S903) input terminal "H": TUNER, "L": other function
16 SW5 I
Input selector switch (S903) input terminal "H": PHONO, "L": other function
17 PHONO O
Function LED (PHONO) drive signal output terminal "L": LED on
18 TUNER O Function LED (TUNER) drive signal output terminal "L": LED on
19 CD O
Function LED (CD) drive signal output terminal "L": LED on
20 AUX O Function LED (AUX) drive signal output terminal "L": LED on
21 GND — Ground terminal
22 — —
Not used (open)
23 T2 O Function LED (TAPE2/MD) drive signal output terminal "L": LED on
24 T1 O Function LED (TAPE1/DAT) drive signal output terminal "L": LED on
25 to 29 — —
Not used (fixed at "L")
30 TEST — Not used (open)
31 XIN I
System clock input terminal (8 MHz)
32 XOUT O System clock output terminal (8 MHz)
System reset signal input from the reset signal generator (IC905) "L": reset
33 RESET I
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
34 HOLD I
Cancellation of hold mode signal "H": start
35 TUNER O Function relay (for TUNER) drive signal output terminal "H": relay on (TUNER on)
36 PHONO O
Function relay (for PHONO) drive signal output terminal "H": relay on (PHONO on)
37 SIRCS I Remote control signal input from the remote control receiver (IC904)
38 to 41 — — Not used (fixed at "L")
42 +5V —
Power supply terminal (+5V)
Function
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