There was no sound and no picture on the screen - MV range
We Repair TV. Consider this case when everything seems to be running in the color TV set (based on take option ZUSTST). When switched on-foot waves, no sound no picture on the screen. Open the case and see what condition the cable socket on the MB to the channel selector (the square block on all sides soldered and shielded). I connect the antenna directly to the channel selector. If work, then obviously the cable is to check and replace. If not, go look for further damage. Look at the items in the ALC (Automatic level control). Go through the circuit and see input filter L1-C4, and circuit applying voltage to ARU (R6-C15). If everything is as they say, "Beam", then take the tester and measure the voltage on the varactors. Find where donut the probe is not difficult, according to the scheme looking for connector x1(A1). If the low voltage on the varactors or generally on the go no, it is likely that the varicap squandered. Watch all the varactors and capacitors in the circuit (VD1-VD13) (C9-C31). it is all in the power of the channel selector until further not climb! By the way, it is a very nasty problem, it can appear and disappear. it is probably just the capacitors. better to replace them all,and then guarantee stable reception provided.
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