Phillips 32pfl3504d/f7

[HairyManBack]

Re: Phillips 32pfl3504d/f7

Well I can't test for voltage, it kept blowing fuses.

[budm]

Re: Phillips 32pfl3504d/f7

Power supply diagrams. Have to look for shorts. What happen if you remove the MOSFET you replace? Diconnect CN602 which feeds the Inverter board to see if the shorts are in the inverter board or not, if it does not blow the fuse with CN602 not connected, then the short will be in the inverter circuits. You should make one of this short indicator so you will not keep blowing up new fuses and components.
http://s807.photobucket.com/albums/yy352/budm/Tools/

[Mark369]

Re: Phillips 32pfl3504d/f7

How do you set every thing up with that short light. Do you need good fuse then plug in tv to the box then the box in to the wall

[HairyManBack]

Re: Phillips 32pfl3504d/f7

Sa601 shows overload on the ohmmeter. I just checked all the resistors and one has way too high an value. R614 should show around .39 ohms but I was getting 12 mega ohms with it out of the circuit. While I'm at it what should I check on the inverter board unless the sa601 will cause it to blow a fuse.

[budm]

Re: Phillips 32pfl3504d/f7

@mark, yes you put everything back together in the TV, this box basically put the lamp inseries with the TV, when the lamp is not lit, the resistance will be less than 10 Ohms (100Watts lamp), when the TV is first power up, the lamp will turn bright for seconds as the main cap is charging up then the lamp will dim down again, if the lamp stays bright all the time, then the TV still have short circuits in it.

[budm]

Re: Phillips 32pfl3504d/f7

R614 was the Source resistor I had you check it earlier, now I believe you MOSFET is shorted that is why that resistor blown open, You also need to check that Zener Diode which is in parallel with R614 that I also mention earlier also.
SA601 is the surge protector, it should show real high resistance when it is OK, it is OK.

[HairyManBack]

Re: Phillips 32pfl3504d/f7

If I already replaced the MOSFET and all the zeners, would putting in a new resistor fix it?

[HairyManBack]

Re: Phillips 32pfl3504d/f7

Also overload on the surge absorber is good? So if it would have had a low resistance it would be bad? Am I on the correct path?

[budm]

Re: Phillips 32pfl3504d/f7

Overload (OL) on your Ohm meter means the resistance of the surge to too high for the meter to read the resistance, again, the surge protector should show open (high resistance) circuit, it works but shorting itself out when it is exposed to the surge and spike.
You need to check your MOSFET again since what ever caused it to go bad the first time may be still there so it may have damaged your new MOSFET.

[HairyManBack]

Re: Phillips 32pfl3504d/f7

Damn, ok. Could have that one resistor have blown that fuse after replacing all the other things?

[budm]

Re: Phillips 32pfl3504d/f7

Resistor is blown because too much current flew through it, resistor does not cause the over current situation. Resistor is used for limiting current flow.

[HairyManBack]

Re: Phillips 32pfl3504d/f7

Well I checked the power supply on the inverter board and its fried along with parts outside of the power supply. Honestly im thinking its going to need a new inverter board. Which is not worth it.

[HairyManBack]

Re: Phillips 32pfl3504d/f7

Thanks for all the help guys.