Philips 32PFL3505D/F7 Logo Flashes on and off

[jstiene]

Hello.

I picked up a Philips 32PFL3505D/F7. When powered on, the PHILIPS logo flashed on and then off and the power LED also comes on and off at the same time. I checked all diodes on both boards with incorrect readings. CAPS look cosmetically ok, although will need to do measurements,etc. I am wondering if anyone has encountered this issue on a this model or a similiar model.

Thanks!
Joe

[jstiene]

Re: Philips 32PFL3505D/F7 Logo Flashes on and off

Hello. Following up on my problem. So checking through the main power supply section, I came across a resistor coded (red,orange,Silver,God) which is a .36ohm resistor. I am having trouble getting a reading across it. When I put my ohmeter in continuity test mode, it beeps with a short. Is that because it is such a low resistance or is it in fact shorted?

[capkid]

Re: Philips 32PFL3505D/F7 Logo Flashes on and off

Is it a through-hole resistor? If so, I'd de-solder one of the leads to get an accurate reading.

[Caleb]

Re: Philips 32PFL3505D/F7 Logo Flashes on and off

I have yet to see a resistor fail shorted, they always seem to go open or higher in resistance, most ohm meters do not have the resolution to measure that low of a resistance accurately. If you happen to have the blue esr meter it does the job nicely.
Not saying that yours is the same but the last 4 phillps tv I have worked on all had issues on the main boards- 3 out of 4 in the dc-dc converter section, 1 was the cpu.

[budm]

Re: Philips 32PFL3505D/F7 Logo Flashes on and off

" I came across a resistor coded (red,orange,Silver,God)" Not sure if you have the orange color correct or not, if that is what you are seeing, then it is 0.23 Ohms resistor (more likely to be 0.22 Ohms), the meter reading will show higher resistance due to your probe resistance. So you should lift one end off the board and then test the resistance again.

[jstiene]

Re: Philips 32PFL3505D/F7 Logo Flashes on and off

I actually removed the entire resistor becuase I was getting a short across it when in circuit. I then removed it and if I put my meter on continuity test (Fuse test with buzzer), it shows a short. I then tested the circuit where the fuse was and it no longer was showing a short leading to the fuse as shorted. I was also getting a low reading across the diode next to it. I was reading .178 in both directions across the diode. I then removed it and it then tested infinite one direction and .478 the other so it was good. I am trying to determine the cause of the Philips LOGO appearing on the screen when power is applied and then it shuts down.