phillips lcd keeps blowing fuse

[MisterD]

Re: phillips lcd keeps blowing fuse

yes I left it off it's working fine. thank you very much

You're very welcome! It would only be used for Backlight Level, that's why you can still adjust the brightness level because it's for the LCD Panel, I just checked my 42" Vizio and it's running at 85 percent backlight.

[TimT]

Re: phillips lcd keeps blowing fuse

yes I left it off it's working fine. thank you very much

[MisterD]

Re: phillips lcd keeps blowing fuse

I'm glad to have helped and that it's fixed, I didn't want to give up, so did you just leave the PWM-SEL wire unhooked? btw save those AA Batteries you soldered together, you may need them for a future project.

[TimT]

Re: phillips lcd keeps blowing fuse

Budm, if I would had paid attention to your questions I might have fixed this sooner! .. but I am gratefull for your patience!

[tom66]

Re: phillips lcd keeps blowing fuse

it will be a sad day when your no longer here!!

I have no immediate plans of leaving.

[TimT]

Re: phillips lcd keeps blowing fuse

I had to post again! Tv is Fine! but a big thinks to everyone here!! with out your help I would be stuck on the first page of this topic!!

[TimT]

Re: phillips lcd keeps blowing fuse

LOL tom66 a little speck on screen. it will come right off, and thank you for your help!!! it will be a sad day when your no longer here!!

[budm]

Re: phillips lcd keeps blowing fuse

Whew! 180 posts with good result, thanks for the feedback.

[tom66]

Re: phillips lcd keeps blowing fuse

Not bad! But what is that spot on the screen?

[TimT]

Re: phillips lcd keeps blowing fuse

Got The Tv back together! picture seems fine!! I would like to thank Budm, MisterD for hanging in there with me. Tv is working and looking good! and it seems I CAN ajust the brightness! Thank you guys so much!!

[budm]

Re: phillips lcd keeps blowing fuse

Per panel spec, it does not have the ADIM (aNALOG DIMMING), it shows pin 14 as backlights control. I am not sure where the PWM-SEL comes from, it does not have that on the spec.

[TimT]

Re: phillips lcd keeps blowing fuse

Thanks for the help guys!! when I get home I will put Tv back together and see what picture looks like.

[tom66]

Re: phillips lcd keeps blowing fuse

PWM-SEL might select between ADIM and PWMDIM or similar.

[budm]

Re: phillips lcd keeps blowing fuse

That is just the Jacks board.
So far he replaced the power supply board and the Inverter board, not sure how much money he will want to put into this TV. It is tough when TV got hit by the surge from lightning.
http://www.shopjimmy.com/philips-a01...l-main-cba.htm
http://www.shopjimmy.com/philips-a01...l-main-cba.htm

[MisterD]

Re: phillips lcd keeps blowing fuse

I'm not sure if this is the correct mainboard for his Serial number but shopjimmy has 4 of them at only $20 with free shipping.

http://www.shopjimmy.com/pandf-a01pg...-mjc-board.htm

[budm]

Re: phillips lcd keeps blowing fuse

I remember helping Mark on that one:
https://www.badcaps.net/forum/showth...t=24444&page=4
But I never know if he was able to get the Zener I recommend for him to use or not, no feedback on that thread if he got it fixed or not. I would like to know the outcome, the thread just stops.

[MisterD]

Re: phillips lcd keeps blowing fuse

My board keep blowing fuses becasue D1208 was shoted. It's a 200V 1w Zener near
IC1201

His isn't blowing fuses anymore, he fixed that a while back. now we are working on backlight problems.

[budm]

Re: phillips lcd keeps blowing fuse

I think the IC may be damaged due to the lighting strike, he needs to find out if the pictures and all the inputs and everything still function, at least he can now see something on the screen. May have to live with it with lamps at full brightness, better than nothing.

[MisterD]

Re: phillips lcd keeps blowing fuse

OK, I found the micro controller that generate the Dimming signal, it is IC3301 on the main board. I wonder if you can do some kind of factory reset to make this pin working again or not. Found it after looking at page 47 and trace out the signals to page 53.
philips_40pfl3505df7_chassis_pl10_5.pdf

I wonder if you can do a firmware upgrade to fix that? Here's the Link, if you decide to do it read it carefully as if I remember right you have to download the file to your computer and then extract (unzip) it and then save that to a usb flash drive.

http://www.p4c.philips.com/cgi-bin/d...&slg=en&scy=US

[MisterD]

Re: phillips lcd keeps blowing fuse

It just mean that you lamps will be fully on.
Can you get the sticker on the LCD panel so I can look up the spec to find out how this inverter board is setup? It seems to be using active LOW logic. Most TV use analog for controlling lamp brightness.
I also still want to know how MisterD TV reacts at the PWM pin when he makes the backlights adjustment.

Bud, My 40" Emerson has a cracked screen, you can only make out the picture at about 10 percent of the screen, so I don't think I can adjust backlights because I can't see the functions on the screen.