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Need help on diagnosing TV with bad HO-Stage
Hello,
I have a Lifetec LT-7079VTS television (German no-name brand), which is actually a Schneider TV 9.6 chassis. The problem with the set is that it can be turned on but no raster comes up. The HV is present (electrostatic field) and the filaments are glowing, but as said before no raster. I have tested the LOPT (unsoldered) and its okay (type S2055N). The weird thing is though that Basis and Emitter of the LOPT are shorted (at least for DC) on board so I suppose the LOPT cannot work properly. I have tested a lot of parts as suggested by the EURAS repair-database but all of them are ok. I suppose the horizontal transformer to be bad but I have no idea how to test it. Any ideas ?!? Adrian |
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