Hi all. looking for the schematic of the power board on the Orion PM4202 plasma TV (also known as the Vision PM4202). Fault is it wont power up, relay clicks off after about 6 seconds and it goes into standby.
Any assistance greatly appreciated
Thanks in advance
Graham
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Hi Graham
Could you mention which PWM circuit is on your power board?. This will probably clear if there is a fault or not in your power board. Based on your comments, I would think about other problem rather than power board. The PWM number will help...
Regards
John_H
Hi John, thanks for the response. Do you actually know this chassis? , this set has 2 very large power boards in it , simply marked SP-2000 power 1 and SP-2000 power 2. Both boards are made by SM-TECH Korea.
Its difficult to say which PWM circuit is in use as there are so many individual power circuits on these 2 boards. I can verify though that the
1st board seems to be supplying 380v to psu 2 and most of the voltages off PSU 2 seem to be more or less correct with the exception of the 12volt lines. Its difficult to just jump in and say the 12volt line is at fault as it may be low due to the unit not firing up correctly due to excessive load elsewhere. I really need to get hold of the circuit diagram of the complete power supply circuitry if anyone has it.On a seperate note, if anyone is looking for the schematic for a Hyundai HPT4240 (Badged LG model) i do have the PSU schematic for it , just drop me an email. (it took me about 3 days scouring the internet to find it )
Graham
Where did you eventually find it?
On a Russion schematics site, cant remember the name but i will post a link up here shortly to some websapce where the file can be downloaded from. You will need Acrobat Reader and Korean font set installing to view it.
Graham
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