Aiwa XR-DVH2450, Service Manual

Page: 35 / 64

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Description
Pin No.
Pin Name I/O
IC DESCRIPTION (DX-NDVH2450)
IC, UPD78044HGF
1~7 G7~G1 O FL grid output G7~G1.
8 VDD – Power supply terminal.
9 O-DISH R O CD turntable reverse rotation output.
10 O-DISH F O CD turntable forward rotation output.
11 NC – Connected to pull-down resistor
12 I/O BUSY I/O DSP serial latch output.
13 O-CLK O CD clock output.
14 NC – Not connected.
15 O-DATA O CD data output.
16 I-DATA I CD data input.
17 RESET I Reset input.
18 O-OPEN O CD tray open output.
19 O-CLOSE O CD tray close output.
20 A VSS – GND.
21 NC – Not connected.
22 I-SW I CD motor key switch A/D input.
23 I-DISH S I CD turntable photo sensor A/D input.
24 B-SKIP I BLANK SKIP A/D input.
25 I-KEY1 I Key1 A/D input.
26 I-KEY2 I Key2 A/D input.
27,28 NC – Connected to pull-up resistor.
29 A VDD – Power supply terminal.
30 A VREF – Power supply terminal.
31 XT1 – Connect to GND.
32 XT2 – Not used.
33 VSS – GND.
34 X1
– 4.19MHz oscillator circuit.
35 X2
36 O-SHIFT O Micro controller clock shift output (Shift when "L").
37 CD ON O Power supply output for CD circuit ("H": ON).
38 LED 2 O Play LED output.
39 LED 1 O Pause LED output.
40 NC – Not connected.
41 O-MUTE O CD Audio mute output.
42 NC – Connected to pull-down resistor.
43 I/O-SERIAL I/O Serial data input / output.
44~46 NC – Connected to pull-down resistor.
47,48 IC – Connect to GND.
49 LED4 O Disc1 LED output.
50 LED5 O Disc2 LED output.