Changhong Electric 21BM91, Руководство по обслуживанию, Страница: 30 / 58

SERVICE MANUAL
36
IF VCC 5 V
VCC terminal for IF circuit.
Supply 5 V.
37
S-Reg.F
Terminal to be connected capacitor for stabilizing internal bias.
38
Deemph/
Audio out Terminal to be connected capacitor for SIF Det
De-Emphasis.
39
IF AGC
Terminal to be connected with IF
AGC filter.
40 IF GND GND terminal for IF circuit.
41
42
IF IN
Input terminals for IF signals.
Pin 41 and Pin 42 are both input poles of differential amplifier.
43 RF AGC Output terminal for RF AGC control level.
44 YC VCC 5 V VCC terminal for Y/C circuit.
Supply 5 V.
45
Monitor out
Output terminal for CVBS or Y signal selected by BUS (video
SW).
46
Black Det
Terminal to be connected with
Black Det filter for
black stretch.
47
APC Fil
(Chrome PLL filter)
Terminal to be connected with
APC filter for Chroma demodulation.
This terminal voltage controls frequency of VCXO.
48 IKin Input terminal to sense AKB cathode current.
49 RGB VCC
9 V
VCC terminal for RGB circuit.
Supply 9 V.
50 ROUT Output terminal for R signal.
51 GOUT Output terminal for G signal.
52 BOUT Output terminal for B signal.
53 TV AGND GND terminal for Analog block.
28