Philips 37pfl5405H/05

[budm]

Re: Philips 37pfl5405H/05

Yes.
Can I see good clear pictures of the bottom side of the board?

[redriddick]

Re: Philips 37pfl5405H/05

Will post pictures tomorrow as its in work.
I dont think its the bridge though.

[redriddick]

Re: Philips 37pfl5405H/05

Pictures attached of bottom of board.

[redriddick]

Re: Philips 37pfl5405H/05

I think mosfet 6n80c is gone.
Can I use a FQPF9N50CF in its place as I have one here or should I try and order one????

[redriddick]

Re: Philips 37pfl5405H/05

Just for the record when the above fet is removed the dim bulb does not light!!
Location HS2 on board.

[redriddick]

Re: Philips 37pfl5405H/05

Ok so I have fitted the new fet and no light on dim bulb.
PSU back in tv and no led on tv.
Every few seconds dim bulb lights and small led on underside of psu(location d431) lights with a click and this then keeps repeating.
Any ideas????

[redriddick]

Re: Philips 37pfl5405H/05

So all voltages are ok on psu and I have narrowed it down to disconnecting plug cn6 to mainboard.
When this is not connected no flash from dim bulb and no light on led on underside of psu.
It must be a mainboard problem????
How do I go about testing this???

[redriddick]

Re: Philips 37pfl5405H/05

Pics of mainboard.

[redriddick]

Re: Philips 37pfl5405H/05

Any help guys???

[redriddick]

Re: Philips 37pfl5405H/05

Should I try this tv without the dim bulb tester???

[Neelix]

Re: Philips 37pfl5405H/05

You said that you measured all voltages on the PSU. Does that include the voltage at CN3 and CN4? From the print in the 2nd picture you posted, the voltage at CN3 is 1080V AC and at CN4 the voltage is 980V AC. So be carefull there because you can damage your meter if it's not designed to handle voltages like that. The two connectors at the top right corner in the 1st picture, post some close ups of the print next to them so that we can see what each pin of the connectors are for and how unplugging CN6 affects the working of the TV

[nomoresonys]

Re: Philips 37pfl5405H/05

seems like a mainboard issue, not sure, but they're pretty reasonable on ebay, http://www.ebay.co.uk/sch/i.html?_od...&_sacat=163768

[redriddick]

Re: Philips 37pfl5405H/05

Thanks a mill guys.Pics of connection attached.
When I said I had tested voltages on psu I meant at these connections.
Thanks again guys as I thought I was on my own with this!!!!

[redriddick]

Re: Philips 37pfl5405H/05

I have no led on front of tv but when I press any of the buttons on the side the red led on front flashes.
I also noticed that the backlight on the panel lights up and then flash and dim bulb lights.

[redriddick]

Re: Philips 37pfl5405H/05

gonna pull the trigger on a new main board and see

[redriddick]

Re: Philips 37pfl5405H/05

Got new board same bloody problem!!!

[redriddick]

Re: Philips 37pfl5405H/05

Ok so I said bugger it I'm goona try it without the tester and low and behold it started right up.
Have the old board in it at the mo and its not finding any channels,I think this set may have been a victim of a lightning strike.
I will try the other board in the morning or later on.

[redriddick]

Re: Philips 37pfl5405H/05

Tried the new board and same thing no channels found.
The old board will find 1 analog channel I have but will not find any of the digital channels.
The new board find nothing.
The channel the old board finds is not the best quality when comparing with another tv I have.
ANy ideas guys??????

[redriddick]

Re: Philips 37pfl5405H/05

Cheeky bump!!!

[nomoresonys]

Re: Philips 37pfl5405H/05

so you get a good clear menu?