Maintenance Service And Trouble Shooting - Haier 21F3A-T Service Manual

10.

Maintenance Service and Trouble shooting

A. Principle integrated circuits
A1. 21F3A-T color TV set composed of the following sections
(1) Small signal processing: super monolithic integrated circuits N204(TMPA8823CSN).
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 (2SD1879), Horizontal flying back
transformer T402 (JF0501-19910).
Switch power supply: switch transformer T501 (BCK-08A6F), power transistor
(4)
V503 (2SC4236).
AV switch integrated circuits N203 (TC4053).
(5)
A2. Main integrated circuits:
(1) TMPA8823CSN
(2) LA7840
(3) TDA2611
Microprocessor
Picture IF/sound IF/video processing/H and V
Scan/color decoding
Vertical output integrated circuits
Sound power amplifying integrated circuits
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Maintenance Service and Trouble shooting