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





"John_H" wrote in message
...

Graham Robinson Wrote:
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

remove 'nospam' to reply


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




--
John_H

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 )

Where did you eventually find it?
--
Al, the usual

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


"Usual Suspect" wrote in message
obal.net...
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 )

Where did you eventually find it?
--
Al, the usual

Hi Graham

No, I'm not familiar with this chassis, but I do wiring and electronic diagrams mostly and fix power stuffs all the time. I've seen some interesting PS units which first do Power Factor Correction and then switching power supply. They're plenty of ICs and they will fill all of our devices in short because of their excellent low harmonic performance.

Perhaps you may send a coupe of good pictures of them with remarked numbers on. I could try to help you on this.

you may send them to electron1999 at hotmail.com

Please send the HPT4240 (Badged LG model) PSU schematic. This may help too.

Regards

John_H