Question about Hitachi 42PD3000 42 in. Plasma Television
The box and TV is all pluged in both are on standby yet only TV goes green and box stays on Red I Need An ENGLISH COMPANY
I have an AV3000E that developed this symptom following a 5 second power cut.
I downloaded the manul, suspecting a power supply problem. The way the AV3000E works is to have a 5 volt power supply running all the time, this powers the main processor. The main processor then energises a relay (S901) by applying 5V DC between relay pins 3 and 4. The relay contacts switch rectified mains power to the main switching regulator. The replay was being energised but appeared not to be switching. While the AV3000E was connected to the mains, I carefully I connected a short between relay contacts (1 and 2) while the processor was trying to energise the relay coil. The TV burst into life. I removed the short and the TV continued to operate normally and has done so ever since. I cannot entirely rationalise why this has worked as this should not have fixed the relay, what may have happened is that the short power cut may have resulted on the some corruption of the processor non-volatile memory, and that the incorrect operation of the main relay caused the processor to reset it's internal memory.
BE WARNED, WHAT I DID WAS EXTREEMLY DANGEROUS AS THE RELAY CONTACTS I SHORTED ARE CONNECTED TO THE MAINS SUPLY - YOU ARE LIKELY TO KILL YOURSELF IF YOU DO NOT KNOW WHAT YOU ARE DOING - PLUS I TOOK THIS ROUTE AFTER ELIMINATING THE OTHER OBVIOUS PROBLEMS LIKE FAILED FUSES.
Posted on Jul 04, 2009
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Posted on Jan 02, 2017
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