Aiwa HS-TX525 Service Manual page 17

IC DESCRIPTION (HS – TX527)
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IC, LC72348W-9A84
3 7 63 1515 0
Pin No. Pin Name
1 XOUT
2 TEST2
3 PA3
4 PA2
5 PA1
6 PA0
7 PB3
8 PB2
9 PB1
10 PB0
11 PC3 (FM OUT)
12 PC2 (TV OUT)
13 PC1 (S-BASS)
14 PC0 (DES1)
15 PD3 (DES2)
16 PD2 (DES3)
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L 13942296513
17 PD1 (TAPE)
18 PD0/INT
19 PE1 SEEK OUT
20 PE0/BEEP
21 PF2/ADI3
22 PF1/ADI1
23 PF0/ADI0 (REMOTE)
24 VSS
25 S20/PG3 (POWER SW)
26 S19/PG2 (HOLD)
27 S18/PG1 (MUTE)
28 S17/PG0 (TU OUT)
29 S16/PH3 (TU IN)
30 S15/PH2 (PRE SW)
31 S14/PH1 (LIGHT SW)
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32 S13/PH0
33 S12
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I/O
O Crystal oscillator (75kHz) pin.
I Connected to GND.
I Key return signal input pin.
I Key return signal input pin.
I Key return signal input pin.
I Key return signal input pin.
O Key source signal output pin.
O Key source signal output pin. (Not used)
O Key source signal output pin.
O Key source signal output pin.
O FM signal output control pin. H:FM/TV/WEATHER band, L:AM band/Standby/Telecom mode.
TV/WEATHER signal output control pin.
O
H:TV(7~13ch)/WEATHER band, L:AM/FM/TV(2~6ch)/Standby/Teleco mode.
O S-BASS circuit signal output control pin. H:S-BASS OFF, L:S-BASS ON/Standby.
I Input destination.
I Destination
I USA
EUROPE
GENERAL
USA WIDE 1
USA WIDE 2
JAPAN
I Teleco mode detect signal input pin. H:Tape display ON, L:Tape display OFF.
I Backup detect signal input pin while HALT status. H:Normal, L:Backup.
O SEEK mode output pin. OPEN:Mute OFF, SEEK, L:Mute ON.
O BUZZER output pin.
I Backup detect signal input pin. H:Normal, L:Backup.
I Input power check (A/D).
I Input remote controller (A/D).
- Connected to GND.
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 Mute circuit control signal output pin. H:Mute OFF, L:Mute ON. (Not used)
O Tuner/Tape select control signal output pin. H:Tape, L:Radio.
I TUNED detect signal input pin. H:TUNED display OFF, L:TUNED display ON.
O PRE-AMP circuit control signal output pin. H:PRE-AMP circuit OFF, L:PRE-AMP circuit ON.
O LED circuit control signal output pin. H:LED circuit ON, L:LED circuit OFF.
O LCD driver output.
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O LCD driver output.
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2 9
8
Description
14Pin 15Pin
L H
L L
L H
Q Q
H H
3 6 7 1 3 1 5
H H
H L
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– 17 –
9 4 2 8
16Pin
L
H
H
H
0 5 8 2 9 9 4 2 8
L
H
m
9 9
9 9