Hi All,
I'm looking for some assistance in finding a fault in my Philips Plasma (which has Samsung internals).
It has recently become difficult to start, requiring more and more attempts, and now mostly finishes up with the Power LED flashing continuous Red when the remote power button is pressed while it is in standby. The LED initially changes to steady Green, then after about 10 seconds it begins flashing Red. The unit then no longer responds to the remote and the mains power must be removed.
Initially I was suspicious of the large filter capacitors on the power board so I have replaced 3 x 1000uf 160v and 2 x 330uf 450v caps which did seem to bring about some improvement. I subsequently replaced about 10 lower voltage 1000uf and 470uf caps with no further improvement in the situation.
I have noticed that when the fault occurs a Red LED on the main board lights. I have measured (with a DMM) all the placarded voltages I can find and they all seem to be within .1v of the specified voltage.
There are 4 fuses (2 on the main board, and 1 each on the 2 adjacent boards) and they are all intact. I have checked the main board for dry joints and found none, and no caps exhibited the usual signs of bursting (although some I replaced did seem to show signs of a resistive path between both electrodes and the metal can).
On the odd occasion that it does start the image is still very good, and it seems a waste to consign this unit to landfill for perhaps the want of a 90c capacitor.
Any assistance would be greatly appreciated.
Rob.
I'm looking for some assistance in finding a fault in my Philips Plasma (which has Samsung internals).
It has recently become difficult to start, requiring more and more attempts, and now mostly finishes up with the Power LED flashing continuous Red when the remote power button is pressed while it is in standby. The LED initially changes to steady Green, then after about 10 seconds it begins flashing Red. The unit then no longer responds to the remote and the mains power must be removed.
Initially I was suspicious of the large filter capacitors on the power board so I have replaced 3 x 1000uf 160v and 2 x 330uf 450v caps which did seem to bring about some improvement. I subsequently replaced about 10 lower voltage 1000uf and 470uf caps with no further improvement in the situation.
I have noticed that when the fault occurs a Red LED on the main board lights. I have measured (with a DMM) all the placarded voltages I can find and they all seem to be within .1v of the specified voltage.
There are 4 fuses (2 on the main board, and 1 each on the 2 adjacent boards) and they are all intact. I have checked the main board for dry joints and found none, and no caps exhibited the usual signs of bursting (although some I replaced did seem to show signs of a resistive path between both electrodes and the metal can).
On the odd occasion that it does start the image is still very good, and it seems a waste to consign this unit to landfill for perhaps the want of a 90c capacitor.
Any assistance would be greatly appreciated.
Rob.
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