Question about Televison & Video
One morning I turned my TV on and nothing on the screen nor I can hear anything from the spekers. I hear the relay clicking when I turn it on or off. I have replaced the horizontal output with an NTE2331, thought it would fix the problem. What else should I do?
While the horizontal output is often the culprit you need to check some other things out first before jumping in and changing parts. Many sets, due to the high voltages and high amounts of heat they produce are prone to having bad solder connections. Look around the horizontal transformer for one leg than may be loose/desoldered. Also check the connections on the relay, they can come loose (you may even see some black charred discoloration) from repeated on/off cycles and the heat/cool that happens in the sets normal life. Also look at the connections at the flyback transformer. Re-solder all that are not nice and shiny.
If you have a DC voltmeter, verify that you are getting your B+ voltage (approx 160V )up to the horizontal output. If not, look to the low voltage power supply. If it's there and still nothing and all the connections look to be good, check the horizontal drive transistor (smaller transistor that feeds the signal to the base of the horiz. output).
Probably 80%of the time you'll find a bad connection and be off and running again. While you're in there, re-solder the vertical output ic as a precaution. Panasonics (and other brands) are known for the legs of those ics getting loose.
Posted on Oct 07, 2008
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Posted on Jan 02, 2017
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