Specific Information; Principle Integrated Circuits - Haier HT-3768 Service Manual

6
VI. SPECIFIC INFORMATIONS
A. Principle integrated circuits
A1. HT-3768 color TV set composed of the following sections
(1) Small
N204(TMPA8803CSN). and memory N901 (AT24C08).
(2) Sound power amplifying: integrated circuits N701 ( TDA2611).
(3) Horizontal and Vertical scan output circuits: Vertical output integrated
circuits N402 (LA7840), Horizontal output transistor V411 (2SD2499),
Horizontal flying back transformer T402 (JF0501-19908).
Switch power supply: switch transformer T501 (BCK-08A6), power
(4)
transistor V503 (2SC4584).
AV switch integrated circuits N203 (TC24C08).
(5)
A2. Main integrated circuits:
(1) TMPA8803CSN
(2) TDA2611
(3) LA7840
A3. Electrical circuit analysis
1 Microprocessor and Small signal processing: super monolithic integrated
circuits
TMPA8803CSN is super large integrated circuit decoder, containing
intermediate image amplifying, intermediate sound amplifying, horizontal and
vertical scan, small signal processing, color decoding, hi-pressure tracing
and over-load protection, I
Information introducing functions and testing data for maintenance is listed in
Table 1.
Table 1
Step
1
BAND1
Rear cover
signal processing:
Microprocessor
Picture IF/sound IF/video processing/H and V
Scan/color decoding
Vertical output integrated circuits
Sound power amplifying integrated circuits
TMPA8803CSN
2
C bus control.
Function
0090202355
super monolithic
Ground Resistance (R)
Working
Voltage Positive
(V)
0
15
1
integrated circuits
Negative
( ) ( )
600 5000