Aiwa TV-C143, Service Manual, Page: 18 / 28

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1 AFT OUT O The terminal for AFT output and self-adj output.
2 A OUT O
Audio output pin.
3 IF VCC - Vcc of PIF circuit.
4 SIF IN I SIF input pin. (Connected to GND)
5 IF GND - GND of PIF circuit.
6 IF IN I IF signal input.
7 IF IN I IF signal input.
8 RF AGC O RF AGC output.
9 IF AGC - The terminal to be connected with an IF AGC filter.
10 APC - APC filter of chroma for demodulation.
11 XTAL I 4.43MHz crystal oscillator.
12 Y/C GND - GND of Y/C circuit.
13 YS I The terminal for switching of analog RGB mode and fast half tone.
14 EXT R I Analog red signals input.
15 EXT G I Analog green signals input.
16 EXT B I Analog blue signals input.
17 RGB VCC - Vcc of RGB circuit.
18 ROUT O R signals output.
19 GOUT O G signals output.
20 BOUT O B signals output.
21 ABCL I ABL/ACL control.
22 V RAMP - Connected with cap to make V.RAMP signal.
23 V NFB I Input of V.sawteeth signal feedback.
24 V OUT O Vertical drive signal output.
25 V AGC – V.AGC cap.
26 SCL I I
2
C bus clock input.
27 SDA I/O I
2
C bus data input/output.
28 H VCC - Vcc of vertical circuit.
29 CW OUT I/O PAL/NTSC ID output and SECAM ID input.
30 FBP IN I FBP input.
31 SYNC OUT O Composites sync output.
32 H OUT O Horizontal drive signal output.
IC, TB1240AN
Pin No. Pin Name I/O Description
Table 1. Selecting AV mode
IC402 PIN10 PIN9
TUNER L L
AV1 L H
AV2 H L
Table 2. Selecting tuner sound IF filter
IC201 PIN10 PIN9
4.5MHZ L L
5.5MHZ L H
6.0MHZ H H
6.5MHZ H L