Question about Televison & Video
Iam a tv technition .i got a calcom clock tv chassis complaint.its horizontal section oscillating three times and staying on standby position. can you tell any chances on this complaint.i changed the UOC also (TDA 12135) but it is in same possition, expecting your valuable replay.thankyou
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Posted on Jan 02, 2017
hi there, light flashes means a shorted parts at the power supply and mostly at the horrizontal sec,, it may need to check-up and repair., do some testing and check-up at the horrizontal section. ty
Posted on Mar 10, 2008
SOURCE: on replay black horizontal line
Probably the video head has to be cleaned - you should give it to a local camera service center. I don't recommend using the cleaning tapes.
Hope this helps!
Posted on Jul 29, 2009
Before replacing the main board, the PSU should have been tested. This TVs PSU provides power on different voltages, and each voltage is controlled through a low DC control line from main board. A defective PSU may turn off and restart by itself.
In real word I repair many LCD TVs. I do not get tired of repeating that LCD TVs are very different from home computers. Repairing by simply board swapping does not work. Although this units have few parts, the working process of the TV does not allow identifying reasons of faults from symptoms (with a PC you can often tell), parts are expensive, and testing is always necessary.
In your case for example the problem is likely a faulty PSU, but a bad grounding caused by missing screw may also cause the problem. The PSU, which is likely culprit, must be tested by jumping the control lines and reading volts to main board. This is made more difficult by the fact that the TV is forcing shut down, and turning volts off continuously.
Posted on Sep 13, 2010
tv set no sound coming.i replce sound out put ic but not hasbeen coming .i think 9370/1665 ic in side a/f out put line is gone i have a this curcuit daigarm not avilable so pl help this point
Posted on Nov 02, 2010
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