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Equipment Repairs => PLASMA TV forum => Topic started by: waxhead on August 13, 2009,07:55:53

Title: Nec PX-42VM3G service manual wanted
Post by: waxhead on August 13, 2009,07:55:53

im after a service manual for the nec PX-42VM3G or similar model with the same boards

thanks

Title: Re: Nec PX-42VM3G service manual wanted
Post by: waxhead on August 13, 2009,19:26:30

psu is at fault i think

only checked caps and fuses at the mo.
i can hear it buzzing for about 15 - 20 secs then stops for 5 ses then starts buzzing again


anyone come across faults on a PKG-1885 power board

checked the owners manual and the red and green flashing light means psu has a fault on the board and should be taken to NEC for repair.

any help would be great

thanks guys

Title: Re: Nec PX-42VM3G service manual wanted
Post by: michael first on August 14, 2009,13:39:45

Hi,one thing to do is to unplug the connectors to the boards that supply the plasma panel;so you can be sure of the good functioning of the PSU.

Title: Re: Nec PX-42VM3G service manual wanted
Post by: waxhead on August 14, 2009,14:50:06

done that

unplugged everything on the power and input boards apart from a lead going to the input board from the power board because the on/off switch goes to that.

and its still the same.

so its a 50/50 guess,

and my guess is the power board not the input, also seeing that in the manual it says that the red/green flashing light means fault on the power board aswell.


thanks for your help

Title: Re: Nec PX-42VM3G service manual wanted
Post by: waxhead on August 15, 2009,17:14:20

is anyone signed up to euras

apparently there are some repair tips on there. would be great if anyone coulds supply me the info off there. i will give you some pocket money aswell. :laugh1:

Title: Re: Nec PX-42VM3G service manual wanted
Post by: michael first on August 21, 2009,17:44:35

Hi,not signed up with Euras,sorry;maybe the leads to the control board must be connected,'cos if not ,the PSU is not driven by the micon. I haven't the SM of this specific chassis,but usually the PSU drawings aren't supplied.

Title: Re: Nec PX-42VM3G service manual wanted
Post by: carrera on August 23, 2009,11:43:55

I have an NEC VP4g, which has a similar power supply. Mine would work for a few seconds before switching off & going to standby. Repair was effected by replacing the three large capacitors.

If you don't have all the connections to the board it will not switch on & go to standby

Title: Re: Nec PX-42VM3G service manual wanted
Post by: waxhead on August 24, 2009,18:09:58

thanks for help guys.

sorted it now.i replaced the input board and all is working great