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TVs
TV HAIER HTAR21B Does not turn on.
78
hace 5 años
hace 5 años
This TV arrived at the workshop with the following fault: it does not turn on, it is uncovered and I change some 160 / 100mf and another 160 / 47mf filters but it does not start only now that it turns on the LED but it flashes and does not respond for the power suiche this tv has the following nomenclature ............ tv haier trc model HTAR21B Chinese 80w 21 inches I do not know if this is the chassis num has everywhere 2107BNM, CRT.SX The filter was changed from + to TL431A and the LED measured voltage on the main filter continues and has 170 volts. and the secondary does not stabilize the current reach 110volt and falls to 75 volt and 80 volt. The parts of this TV are the sig. ... regulator.CQ0765J ... vertical.TDA8357J ... horizontal.TT2190 .... micro OM8377PS / N3 / 2 ... DT5-NF30F selector .... flay BSC25-0283..if any of the friends can you help me solve this fault I would appreciate it in advance thank you very much HELP ....... PLEASE ..
2.372
hace 5 años
hace 5 años
Friend disconnects + B from the flayback, and if possible put a focus as a false load, if the voltage stabilizes the problem is in the area of the flayback and tsh, if it does not stabilize it changes in addition to 431 the optocoupler, verifies filtering of the voltages of the Secondary, check the primary resistance of the power supply of the occilator as well as the auto-start and pin 5, which will make progress to continue helping. Greetings and luck
78
hace 5 años
friend I already did the test I inform you to disconnect the pin of the + b of the flay I put a false charge and 114 volt arrives at the + by filter and the LED stabilizes and I give it power and it changes to green tell me what else can I check or change
2.372
hace 5 años
Check tsh and condensers in the area, if everything ok you have the bad flayback, you must replace it. Regards
78
hace 5 años
hello good morning friend I changed the horizontal trs, in series with the 60w bulb and I turned it on I left it on for a while and turned off again I measure the trs and it burned again I will change ceramic counters
78
hace 5 años
The TV is ready. The solution was that it burned the tsh, a zener diode that goes with the collector to earth was changed.
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Curso Refrigeración Comercial Aplicado a Diagnóstico y Reparación
Ing. Georga Melgarejo
$ 40 USD
$ 13 USD
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