Haier 29T9D Service Manual page 42

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,
42
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
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