Aiwa HS-TX526, Service Manual, Page: 13 / 23

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IC DESCRIPTION -1/1 (TC9318FA-074) -2/2
Pin No. Pin Name I/O Description
39 P1-2 (DES1) I Input destination.
40 P1-3 (DES2) I Destination 39Pin 40Pin
EUROPE L L
GENERAL L H
USA H L
JAPAN H H
41 P2-0 TAPE I Teleco mode detect signal input pin. H:Tape display ON, L:Tape display OFF.
42 P2-1 POWER CHECK I Input power check (A/D).
43 P2-2 REMOTE I Input remote controller (A/D).
44 P2-3 POWER SW O AMP circuit control signal output pin. H:AMP circuit OFF, L:AMP circuit ON.
45 P3-0 HOLD I Main key hold SW input pin. H:Hold OFF, L:Hold ON.
46 P3-1 BUZR O BUZZER output pin.
47 MUTE O Mute circuit control signal output pin. H:Mute OFF, L:Mute ON.
48 TEST I TOSHIBA TEST mode control input pin.
49 WAKE I Backup detect signal input pin.
50 TUNED IN I TUNED detect signal input pin.
51 TU OUT O Tuner/Tape select control signal output pin. H:Tape, L:Radio.
52 DO2 VT O Phase comparator output pin.
53 GND - Connected to GND.
54 FM IN I FM broadcast input pin.
55 AM IN I AM broadcast input pin.
56 VDD - Positive power supply pin.
57 RESET I System RESET signal input pin.
58 XOUT - Crystal oscillator (75kHz) pin.
59 XIN - Crystal oscillator (75kHz) pin.
60 VXT - Crystal oscillator power supply pin.
61 VLCD - Reference voltage terminal for LCD drive.
62 C1 - Reference voltage terminal for LCD drive.
63 C2 - Double voltage boosting terminal for LCD drive.
64 VEE - 1.5V constant voltage power terminal for LCD drive.