john pearson Posted on Oct 14, 2006

Please Help - Set "Dead" Euro 7 vp chassis

Hi, Television died the other day most unexpected, Symptoms: 1. On switching on there was a high pitched squealling with a flickering screen then auto switch off after 10-20 sec.s standby light flashed three times. 2. On switching on now there is a clicking noise which lasts for 10 sec.s then shut down. no squealling noise or start up. looked at main fuse - ok looked at "P" board -seemed ok looked at "A" board- solder on R9611 thru R9615 seemed a bit rough but checked out with meter, Would really appreciate some direction on next course of action, Can you help regards jon

Anonymous May 13, 2008

some problem here. disconnect 1 week connect to 220v and voila it works.

this is not the first time before happen turn off from ac wait 1 or 2 days and voila work for mouths. dont know what is the problem but maybe its a lamp/tube problem.
Anonymous May 15, 2008

please someone can give me the schematics for this tv or service manual. my tv 3 blink red light and off. i see pcb and see a S4 Pin in a transformer that dont have too much solder i think is a problem or just a fix made by panasonic. ths

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Anonymous

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Posted on Oct 16, 2006

Anonymous

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This sounds like a line timebase failure. The line timebase works at about 15 thousand cycles per second (15KHz) which may be audible to some people due to the iron-ferrite materials used (magnetostrictive). The line output transformer is highly stressed and also has the rectifier diodes in the outside if the windings. It is all very well insulated to guard against moisture and dust but if it breaks down due to the high voltages (25Kv) the arc produced makes this squealing noise, and of course it burns out, and breaks down. This may not blow the fuse if there is not a short circuit. So get an engineer if you are not sure about changing the line output transformer.

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