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29.
DECS.DEM
30.
GND2
31.
SND.PLL
32.
AVL
33.
H.OUT
34.
F.B.L.SO
35.
AUO.EXT
36.
EHTO
37.
PLL.IF
38.
IF.VO/SVO
39.
VP1
40.
CVPS.INT
41.
GND1
42.
CVBS/Y
43.
CHROMA
44.
AUD.OUT
45.
INSS.W2 BL
46.
R2/V.IN
47.
G2/Y.IN
48.
B2/U.IN
49.
BCL.IN
50.
BLK.IN
51.
R.OUT
52.
G.OUT
53.
B.OUT
54.
VDD.A
55.
VPE
56.
VDD.C
57.
OSC.GND
58.
XTAL.IN
59.
XTAL.OUT
60.
RESET
61.
VDDP
62.
AV1/AV2
63.
AV/SVHS
64.
INT.REM
2.3 Analysis of common passage circuits
Having been received by antenna or fed by cable TV into the antenna input terminal of HF tuner
TU101 TECC7949 , HF TV signals pass through tuning for station selection, HF amplification and
frequency mixing inside the HF tuner and then, a 38MHz IF picture signal and 31.5MHz IF sound
signal will be transmitted from the IF terminal of TU 101 and be fed directly into (1) of the pre-IF
amplification thick-film circuit N101 (M9911A), where the signals will be amplified to compensate for
the insertion loss of the sound surface filter.
The sound surface filter SF101 K6264K adopts single-terminal or double-terminal input according to
different system choices. The single-terminal or double-terminal input are controlled by the (6) of
N201 via V101 BC548C : D/K, B/G and I signals will be input in a single channel and M signals in
double channels. The sound surface filter K6264K is a wide range filter for single channel input,
suitable for D/K, B/G and I sound signal; and is a narrow range filter for double-channel input,
2.4
5.9M
0
0
2.4
6.3M
0
6.2M
0.6
21K
0.3
6.4M
0
0
1.7
21.8K
2.4
6.4M
3.3
4.3M
7.8
18K
3.9
5.4M
0
0
3.3
6.2M
1.5
83K
3.4
6.4M
2.1
0.86K
2.5
6.3M
2.5
6.3M
2.5
6.3M
1.5
216K
4.9
28K
2.8
7.46K
2.8
7.48K
2.9
7.5K
3.3
32K
0
0
3.3
32K
0
14
1.8
3.0M
1.7
0.5M
0
0
3.4
32K
5.1
15K
5.1
15K
5.0
41K
32
Circuit Explanation
3.6M
0
4.7M
3.8M
21K
4.4M
0
22K
4.6M
4.6M
18K
4.1M
0
4.0M
83K
4.8M
0.86K
4.5M
4.5M
4.5M
239K
28K
7.5K
7.5K
7.5K
26K
0
26.5K
13
2.7M
0.54M
0
26.6K
15K
15K
40.6K
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