Aiwa XR-M313, Service Manual

Page: 23 / 38

IC DESCRIPTION
IC, LC877256V-5V22
Pin No. Pin Name I/O Description
1 ~ 4 NC - Not connected.
5 I-WRQ I CD WRQ input.
6 I-DRF I CD DRF input.
7 I-CDDO I CD sub code input.
8 O-VOL CTL O Volume control output.
9 O-AON O Main power ON/OFF control output.
10 O-CKSFT O Clock shift.
11 RST I Micon reset input.
12 I-ACOFF I Hold A/D input.
13 I-TU-SIG I RDS signal level A/D input. (Connected to GND through a resistor.)
14 VSS1 - GND.
15 CF1
- 9.43 MHz oscillator circuit.
16 CF2
17 VDD1 - Power supply.
18 I-KEY0 I Key0 A/D input.
19 I-KEY1 I Key1 A/D input.
20 I-DOOR I CD door SW ON/OFF input.
21 I-LVL I Not used.
22 I-TUDO I Tuner tune IFC input.
23 I-STEREO I Tuner stereo input.
24 I-COLOR I Color A/D input.
25 I-INT2 I Initial A/D input.
26 I-TMBASE I Time base clock base input.
27 I-RDSCLK I RDS clock input. (Connected to GND through a resistor.)
28 I-RDSDATA I RDS data input. (Not used)
29 I-RMC I Remote control input.
30 O-PLLCE O PLL chip enable output.
31 O-TPCLK I Test point input.
32 O-LDBL O Back light blue output.
33 O-LDUM O Back light umber output.
34 O-LDGR O Back light green output.
35 O-LDTOP O Not used.
36 O-LDSP O SPKR LED ON/OFF control.
37 ~ 38 NC - Not connected.
39 ~ 53 S9 ~ S23 O LCD segment output.
54 VDD2 - Power supply.
55 VSS2 - GND.
56 ~ 77 S24 ~ S45 O LCD segment output.
78 ~ 82 NC - Not connected.
83 ~86 COM0 ~ COM3 O LCD segment output.
87 ~ 88 NC - Not connected.
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