Aiwa XR-EM20 Service Manual page 37

IC DESCRIPTION - 5/6 (LC876748A-5Z32) - 1/2
Pin No. Pin Name
1 O-COCK
2 O-RWC
3 O-CDIN
4 I-WRQ
5 I-DRF
6 I-SQOUT
7 ECO-LED
8 O-MOTOR
9 O-SOL
10 O-CLOCK_SHIFT
11 I-RESET
12 NC
13 O-DECK
14 VSS1
15 XIN
16 XOUT
17 VDD1
18 I-HOLD
19 I-VOL
20 RWSWF
21 I-SW-TP
22, 23 I-KEY2, I-KEY1
24 I-CDTSW
25 I-RDS_SIG
26 I-AS
27 DRV-MUTE
28 I-RDCL
29 I-RMC
30 NC
31 NC
32 ~ 36 NC
37 ~ 44 O-G1 ~ O-G8
45 O-P1
46 VDD3
47 ~ 50 O-P2 ~ O-P5
51 VEE
52 ~ 66 O-P6 ~ O-P20
67 I-FMW
68 I-LW
69 NC
70 I-AM10K
71 I-RDS
I/O
O CD control Q code clock signal output.
O CD control command LAT signal output.
O CD control command data signal output.
I CD control SCOR signal input.
I CD control focus OK input.
I CD control Q code input.
O Not used.
O Motor control output.
O Cassette play control signal output.
O Clock shift output for micro-computer when using tuner.
I Reset input for micro-computer.
– Not connected.
O Deck control output.
– Connect to GND.
– Main clock input 9.43MHz.
– Main clock output 9.43MHz.
– Digital power supply pin.
I Hold input.
I Volume control input.
– Not used.
I Deck mechanism SW AD input.
I Key AD input 2, 1.
I CD mecha switch input.
I Not used.
I Cassette deck auto stop switch signal input.
– Not used.
I Not used.
I System remote control signal input.
– Not used.
– Not used.
– Not used.
O VFD driver control data signal output.
O VFD driver control data signal output.
– Digital power supply pin.
O VFD driver control data signal output.
– Connect to –VFL through a resister.
O VFD driver control data signal output.
I FM selection initialisation resistor connect.
I LM selection initialisation resistor connect.
– Not used.
– AM(10k) selection initialisation resistor connect.
I Not used.
Description
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