Aiwa HS-TX525 Service Manual page 20

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Pin No. Pin Name
39 P1-2 (DES1)
40 P1-3 (DES2)
41 P2-0 TAPE
42 P2-1 POWER CHECK
43 P2-2 REMOTE
44 P2-3 POWER SW
45 P3-0 HOLD
46 P3-1 BUZR
47 MUTE
48 TEST
49 WAKE
50 TUNED IN
51 TU OUT
52 DO2 VT
TE 53 GND
L 13942296513
54 FM IN
55 AM IN
56 VDD
. 57 RESET
58 XOUT
59 XIN
60 VXT
61 VLCD
62 C1
63 C2
64 VEE
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I/O
I Input destination.
I Destination
EUROPE
GENERAL
USA
JAPAN
I Teleco mode detect signal input pin. H:Tape display ON, L:Tape display OFF.
I Input power check (A/D).
I Input remote controller (A/D).
O AMP circuit control signal output pin. H:AMP circuit OFF, L:AMP circuit ON.
I Main key hold SW input pin. H:Hold OFF, L:Hold ON.
O BUZZER output pin.
O Mute circuit control signal output pin. H:Mute OFF, L:Mute ON.
I TOSHIBA TEST mode control input pin.
I Backup detect signal input pin.
I TUNED detect signal input pin.
O Tuner/Tape select control signal output pin. H:Tape, L:Radio.
O Phase comparator output pin.
- Connected to GND.
I FM broadcast input pin.
I AM broadcast input pin.
- Positive power supply pin.
I System RESET signal input pin.
- Crystal oscillator (75kHz) pin.
- Crystal oscillator (75kHz) pin.
- Crystal oscillator power supply pin.
- Reference voltage terminal for LCD drive.
- Reference voltage terminal for LCD drive.
- Double voltage boosting terminal for LCD drive.
- 1.5V constant voltage power terminal for LCD drive.
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2 9
8
Description
39Pin 40Pin
L L
L H
H L
H H
Q Q
3 6 7 1 3 1 5
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– 20 –
9 4 2 8
0 5 8 2 9 9 4 2 8
m
9 9
9 9