Philips 42pfl7603d/10 dead

[finntricky]

Re: Philips 42pfl7603d/10 dead

I measure 32V DC on C906 and 10V on C912

so by your readings, my board readings are wrong,
i did say they did'nt look right on those caps, so the fault is before the voltage gets there, but where,??????
and no, never had 3.3v standby to start with, hence this thread.
thanks to budm, we have got as far as we have, but did'nt think it would take this long to find the problem,

[CapLeaker]

Re: Philips 42pfl7603d/10 dead

Check BD2, D910 and R901 (fusible resistor). Maybe look at the schematic diagram, that Budm provided, everything is in there.

[finntricky]

Re: Philips 42pfl7603d/10 dead

i have now spent hours looking at the SCH and have tryed to follow it, looks stright forward, and i can see how the parts are conected and why budm has told me what to check, but have still not found the faulty item,
am i right in thinking if BD2 was at fault, then i would not have 335 volts at C902,
D910 tests ok, and R901 test ok as before.

[CapLeaker]

Re: Philips 42pfl7603d/10 dead

Be careful on the primary side. Put the negative lead on the negative side of c902 and the positive lead of the DMM on pin 5 then pin 6 on that transformer. If you get high DC voltage, the primary side of the STBY circuit is o.k. And th problem is on the other side of the transformer, or the transformer itself.

[budm]

Re: Philips 42pfl7603d/10 dead

OK, IC901 SMPS for the 3.3VSB is ICE3AS02, the start up Voltage at the VCC pin has to reach 15VDC which you are not getting that Voltage for the circuit to startup, so it can be the startup/running cap C912 may be bad, or the internal charge pump inside the IC is bad.
BTW, R916, R903 are OK?

[finntricky]

Re: Philips 42pfl7603d/10 dead

Defo not the cap, even took it out again and replaced, also the the R916 R903 check out fine to, so thanks guys for all your help, but i now feel the need to put this to bed, without a found fix, so if anybody has got a power board, they wish to sell me, at a good price, (working of cause), let me know,

[Moreno83]

Re: Philips 42pfl7603d/10 dead

Then that IC is dead. I can send you my powersupply if you pay for the shipping+a beer

Its definately working but its missing 2 blue ceramic capacitors. Board works so you can use it for parts?

[budm]

Re: Philips 42pfl7603d/10 dead

The IC is the suspect at this point if the startup cap is not bad due to the fact that the VCC never reached the startup level.

[finntricky]

Re: Philips 42pfl7603d/10 dead

Then that IC is dead. I can send you my powersupply if you pay for the shipping+a beer

Its definately working but its missing 2 blue ceramic capacitors. Board works so you can use it for parts?

your a good fella, how much would you like for it ? and do you have paypal ?.
PM me Moreno83.

[malik4]

Re: Philips 42pfl7603d/10 dead

i need service manual
philips model 42pfl8803d/30

power supply not compaer

problem backlight on.......................off.........................on........................off

plz help

[hispeck]

Re: Philips 42pfl7603d/10 dead

Hello friends, i have same tv, but my the red light is just blinking continuously. and the stanby 3.3v is not stable