HI
Someone gave me away a Hitachi P50H4011 plasma tv which has a problem.The tv doesnt power on by remote.the only way to turn it on is with an overide button hidden in the buttom of the tv.when i push on the button (physical button with a spring) the tv comes on and all i can see is snowy picture ( static) no menu or whatsoever.
i took the tv apart and i saw to bodging caps 3300 uF( the two big caps on the right hand side of the power supply),before i measure any voltage i tried to check their capacitance and ESR, so took them out and i found their value is around 2800 uF ( within the 10% of tolerance ) also the ESR was good around 0.11ohm.( i used a cheap chinese component tester to measure the ESR).
Because i don't have these capacitor value i tried to solder them back and measured all the voltages and i was surprise to find them all without any problem,but the power supply stop working for 5 seconds ( voltages become zeo and picture becomes black) and the cycle repeats.
i checked all the diodes, mosfet's and they seems to be good.beside the power supply intermittent problem, i'm wondering why i have the snowy picture, but no menu on the tv.
can someone tell me came across to this type of problem.
Someone gave me away a Hitachi P50H4011 plasma tv which has a problem.The tv doesnt power on by remote.the only way to turn it on is with an overide button hidden in the buttom of the tv.when i push on the button (physical button with a spring) the tv comes on and all i can see is snowy picture ( static) no menu or whatsoever.
i took the tv apart and i saw to bodging caps 3300 uF( the two big caps on the right hand side of the power supply),before i measure any voltage i tried to check their capacitance and ESR, so took them out and i found their value is around 2800 uF ( within the 10% of tolerance ) also the ESR was good around 0.11ohm.( i used a cheap chinese component tester to measure the ESR).
Because i don't have these capacitor value i tried to solder them back and measured all the voltages and i was surprise to find them all without any problem,but the power supply stop working for 5 seconds ( voltages become zeo and picture becomes black) and the cycle repeats.
i checked all the diodes, mosfet's and they seems to be good.beside the power supply intermittent problem, i'm wondering why i have the snowy picture, but no menu on the tv.
can someone tell me came across to this type of problem.
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