eax64905001 No Pfc Help ?

[gurug]

Re: eax64905001 No Pfc Help ?

Can you get us an image of the underside of the Pcb please ?

PCB is same as listed on first page of this thread, I attached pictures. And also schematics of power supply.

[ReeceyBurger123]

Re: eax64905001 No Pfc Help ?

Can you get us an image of the underside of the Pcb please ?

[vinceroger69]

Re: eax64905001 No Pfc Help ?

S/c means short circuit if you upload a picture of the top and bottom of your power supply im sure we can pont them out too you unless reece knows the location number already

[gurug]

Re: eax64905001 No Pfc Help ?

Check the 24v diode and the Led mosfet for S/C that could be pulling the 24v low.

Can you tell me which diode and mosfet is that? And what diws s/c mean? Voktages on connector to main board are all ok, 24v also.

[ReeceyBurger123]

Re: eax64905001 No Pfc Help ?

Check the 24v diode and the Led mosfet for S/C that could be pulling the 24v low.

[gurug]

Re: eax64905001 No Pfc Help ?

Hello,
I have got the same problem here- LG 32LN570R, but the board is the same tan the one mentioned in the comments above.
The PSU board is eax64905001 ver. 2.4
I can see the image on the display when I use torch , therefore the Backlight is not getting voltage I believe.
I have measured the voltage to backlight, which fluctuate between 11V -21V
Other voltages on PSU board seems to be right 3,3V , 3,47V , 12V and 24V.

Any ideas which part is causing this ?

Thanks for any help

I have exactly same problem, voltage to backlight fluctoates between 11-20V. I replaced MAP3202 - but problem is the same ... can you help me to further diagnose fault?

Thanks in advance.

[ReeceyBurger123]

Re: eax64905001 No Pfc Help ?

no just the blinking leds and not powering up

How you a multimeter mate ?

[ReeceyBurger123]

Re: eax64905001 No Pfc Help ?

Hello,
I have got the same problem here- LG 32LN570R, but the board is the same tan the one mentioned in the comments above.
The PSU board is eax64905001 ver. 2.4
I can see the image on the display when I use torch , therefore the Backlight is not getting voltage I believe.
I have measured the voltage to backlight, which fluctuate between 11V -21V
Other voltages on PSU board seems to be right 3,3V , 3,47V , 12V and 24V.

Any ideas which part is causing this ?

Thanks for any help

Led driver Ic imo replace that. Video coming soon.

[George266]

Re: eax64905001 No Pfc Help ?

Hello,
I have got the same problem here- LG 32LN570R, but the board is the same tan the one mentioned in the comments above.
The PSU board is eax64905001 ver. 2.4
I can see the image on the display when I use torch , therefore the Backlight is not getting voltage I believe.
I have measured the voltage to backlight, which fluctuate between 11V -21V
Other voltages on PSU board seems to be right 3,3V , 3,47V , 12V and 24V.

Any ideas which part is causing this ?

Thanks for any help

[ReeceyBurger123]

Re: eax64905001 No Pfc Help ?

Ok have you checked any voltages yet ?

[snopy44]

Re: eax64905001 No Pfc Help ?

no just the blinking leds and not powering up

[ReeceyBurger123]

Re: eax64905001 No Pfc Help ?

3 blinking Leds on the standby Led ? If so thats normal, does the backlight not come on though ?

[snopy44]

Re: eax64905001 No Pfc Help ?

yes it is the same powerboard just there is nothing about this board on the net

[ReeceyBurger123]

Re: eax64905001 No Pfc Help ?

hi sorry if I am posting wrong but need help what is the problem when you get the 3 blinking leds on powering up

Is it on the same Tv ?

[snopy44]

Re: eax64905001 No Pfc Help ?

hi sorry if I am posting wrong but need help what is the problem when you get the 3 blinking leds on powering up

[ReeceyBurger123]

Re: eax64905001 No Pfc Help ?

Just an update chaps, after replacing the Led driver I now have 1.4v Vcc to the mosfets and 70v on the output to the Leds and now have backlight Thanks all video coming soon.

Image of the replaced driver, unfortunately I lifted a trace so this thing doesn't look factory. Serves me right for not using flux !

[ReeceyBurger123]

Re: eax64905001 No Pfc Help ?

An update chaps, found the I have 0.8v Vcc coming out of the controller which is not high enough to turn on the booster. Got a controller on order

[dick_barton]

Re: eax64905001 No Pfc Help ?

Will this schematic help you?

http://obrazki.elektroda.pl/1033688300_1436654733.jpg

[budm]

Re: eax64905001 No Pfc Help ?

Check the Vin to that Boost inductor L801, when the boost is not on, the Vin will be = to Vout.

[ReeceyBurger123]

Re: eax64905001 No Pfc Help ?

Cheers bud, will download and have a play later on or tomorrow