Question about Televison & Video
My jvc tv won't power on
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Posted on Jan 02, 2017
SOURCE: Lightning spike-dead sets
if it is relay problem you can make it direct just to check.check power supply output. as you say that eht ok than it due to stand by section of system control mcrpssr.
Posted on Sep 13, 2007
SOURCE: JVC AV-35750 TV
I changed capacitor C926 (1000Uf 16V) on main board. It solved the problem. I went with 1000uF 63V as it was readily available...it's okay to go with higher voltage. It was hard to fit it on because of the larger size but it worked.
Posted on Dec 07, 2008
Hi and welcome to FixYa,
Almost always, when an electronic device/equipment fails when powered with and by a generator, it is the power supply unit (PSU). The PSU circuitry expects a fairly constant/stable power source (120 or 220). The output of the generator tends to fluctuate especially under varying electrical load. Additionally, the AC frequency (60Hz) of the generator's output also tend to vary which most PSUs don't like. A noteworthy point to consider is that the generator is floating electrically, its output has no reference to earth/ground.
If you are considering a DIY (do-it-yourself), foremost to inspect would be the PSU particularly the regulator transistor and determine if it outputs +5 and ~+135 VDC. Another to check would be the HOT (horizontal output transistor). If when the TV was used powered by a generator, there was considerable vertical rolling, the vertical deflection IC would also be a suspect.
A friendly reminder, exercise caution when repairing TVs. It stores up EHV (extremely high voltage). It would be to your advantage to reference a service manual (JVC AV-36D303) or at the very least a schematic diagram with voltage readings.
Good luck and Thank you for using FixYa.
Posted on Jan 05, 2009
SOURCE: JVC 36
Hi Dave: "My JVC 36" TV will not power on and has a blinking power light."
That means that the protection circuit has started because a fault had been detected.
If this happened after a power surge it is likely a faulty PSU board.
Try first leaving the set unplugged from power outlet for few hours, this will drain power, reset the protector, and fix problem related to accumulation of electrostatic charges on PSU power capacitors.
If unplugging does not work, that means that there is an internal fault.
If this happened after a power problem of some kind, that means that probably one of the capacitors on powr board had blown, and must be replaced.
The TV must be tested by a technician to find the fault.
Posted on Jan 05, 2009
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