philips tv service means a flat with no damage below the black lines and the longer growing upwards. First check the voltage suply B + 115v. vertical IC voltage 15V CT. video voltage 180v. all the normal stresses, I continue checking on the physical condition yoke, and the result turns out ok. I checked elco and resistors in series and the results smua vertical components in good condition. I try to change the vertical ic but always the same. I try to turn on the tv in a long time and there is a voltage difference v-int on cold and hot conditions, it seems that there is damage to the mylar on v.int condensator 33n value which, when in hot conditions its value decreases. I changed and the result philips tv 21 "flat back to normal.
for more details can be downloaded here schema tv philips = download schematic
for more details can be downloaded here schema tv philips = download schematic
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