أعطال وصيانة تليفزيون-Repair-TV-TCL

TCL T-2139 chassis LK06.


Ingredients: BP TDA16846, BCK80F, + B Adj. Personnel exit TA8403K, tuner TELE4-801A, TB1238AN, TA8213K, control 13-TCLM5V-R1P 87CM38N-1E75.


The manifestation of a fault: fold the top of the screen frame, bottom frame slightly inward 1 cm from the edge of the screen. With
a decrease in the size of the service on a vertical fold at the top of
the frame disappears with increasing prevrashaetsya a horizontal crease.
Modes TA8403K within normal limits. Modes TB1238AN not normal, by 28 foot (power sweep) underestimated the voltage to 7.4 at. Should +9.


zener diode is defective by 8.2 to D833 in the chain of the - regulator Q805 KSD882. Zener diode has a subtle leak in kiloomah.

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TCL 25 185 ch. M113


Composition: TCL A20V07-TO (8857CRNG5DU1), 24C08WP, STV8172.


The top of the screen tilted white stripes. S305 - 0.22 microfarad was - 350pf. After replacing all OK.

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TCL 2560


Composition: TCL-A20V07-TO (8857CRNG5DU1), 24C08WP, NJW1136L, TCL79107D5B3, TDA8172, D1556, TDA8944.


Do not turn on. Crushed line transistor D1556. Replaced, incl .- silence, the LED


is lit. Unsolder pins 5 and 6 24C08WP - TV switched on. I thought, how to find the bytes in 24C08WP, which blocks the processor ON TV. Solved
this problem by using WinHex prog programmer and IC-prog, using the
method of comparison and exception dumps in the two firmwares. Bytes, which will lock TV can be found at: 0010hE (57).


Operating value 37, at 57 - 80 TV does not turn on, or 50 HZ BLOCK. Option in the service menu «OPT». Working firmware and a fragment of a dump is attached. I hope maybe this will help to someone infa. [ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذا الرابط]521 Bytes Downloaded: 82 time (s)

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TCL 2165 chassis M28B


was summoned to the diagnosis, the fuse is lit. Total power
supply spacing: broken key 2SC5586, 2SA1015 a cliff and 2SC1959, C810
and C812 with inflated ESR, swollen by C827 + B. As
a consequence, punched and HR HOT 2SD1555 m / s STV9302A, a protective
resistor R403 breakage in the chain + B and R405 in the chain of +24 V. After
an unsuccessful closing the lid client nadlomana part of the PCB, after
the restoration of track performance TV is completely restored.

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TCL DT-21368SG M28B chassis


power supply is made ​​on the transistors.


burnt transistors in the power supply: Q804-2sc5287, Qq802-2sa1015 and zener D809 9,1 V. Changed the capacitors s801 c812 100,0 mF and 33 mF. Other details are integers.


The power supply to work, but with a strange light "cricket" sound. The voltage on the secondary circuit of 112V, inflated to 127V.Po image slowly moving along the vertical fracture. If you try to reduce tension regulator VR801 "cricket" is reinforced. The oscillogram sits leveling.


just in case I decided to change the


Q803 2sc1959 who called as a completely intact on all transitions. The power supply as it should be earned.

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