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3-8. IC PIN FUNCTION DESCRIPTION
• CONTROL BOARD IC801 TMP47C103N-JP47 (FUNCTION SWITCH CONTROL, LED DRIVER)
Pin No. Pin Name I/O Function
1 XOUT O Main system clock output terminal (4 MHz)
2 XIN I Main system clock input terminal (4 MHz)
3 RESET I
System reset signal input terminal “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
4 PMD I Mode select input terminal Fixed at “H” in this set
5 VOL+ O Motor drive signal output to the volume motor drive (IC802) (volume up direction)
6 VOL– O Motor drive signal output to the volume motor drive (IC802) (volume down direction)
7 SW0 I
8 SW1 I Rotary switch input of the INPUT SELECTOR (S801)
9 SW2 I
10 EON I Detection signal input of the enhanced other networks (EON) Used for the TA-FE520R only
11 PHONO O LED drive signal output of the PHONO LED (D808) “L”: LED on
12 TUNER O LED drive signal output of the TUNER LED (D809) “L”: LED on
13 CD O LED drive signal output of the CD LED (D810) “L”: LED on
14 GND — Ground terminal
15 AUX O LED drive signal output of the AUX LED (D811) “L”: LED on
16 DAT O LED drive signal output of the TAPE2/MD LED (D812) “L”: LED on
17 TAPE O LED drive signal output of the TAPE1/DAT LED (D813) “L”: LED on
18 MON O
Tape monitor on/off control signal output terminal “L”: tape monitor on
Used for the TA-FE520R only
19 PRY O AC on/off relay drive signal output terminal “L”: power on, “H”: standby mode
20 PKY I
Power switch (S1; I/u) input terminal “H”: power on
21 MON I Tape monitor switch (S802) input terminal When pressing the key: “H”
22 SIRCS I Sircs signal input from the remote control receiver (IC803)
23 MUTE O Audio line muting on/off control signal output terminal “H”: muting on
24 SCE O Chip enable signal output to the function switch (IC101)
25 SDT O Serial data output to the function switch (IC101)
26 SCK O Serial data transfer clock signal output to the function switch (IC101)
27 STOP I Detection signal input of the AC input
28 +3V — Power supply terminal (+3V)
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