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kokosak
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PostPosted: Sat Mar 25, 2006 7:12 am    Post subject: Service code Reply with quote

or service manual for TV TRANSContinets TR2121TXT with chassi no. 99TA015J
Thx
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zibee
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PostPosted: Mon Mar 27, 2006 4:34 am    Post subject: Re: Reply with quote

search for MASCOM PT92
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kokosak
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PostPosted: Mon Mar 27, 2006 9:22 pm    Post subject: Thx Reply with quote

I have found it. Thx for advaice.

By the way - a new problem with the TV (MASCOM chassis PT92). There is no high voltage for CRT tube (kV). After the TV is switched on, the control CPU (TDA9353) generates excitation pulses (pin 33) for NPN(BU508) driver of HV transformer. It runs OK approximately 3 seconds, then stops for 5 seconds and again and last time runs for 3 seconds. It looks like trying to start twice.
On the feedback (pin 34) are pulses. Output DC voltages are OK too in that time, but the IC stops to generate the excitation signal.
Any idea?
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