tv lcd Philips 42pfl9632d/10 Power board ko

[Bibu]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

Kiriakos GR

3305 and 3306 are resistors?

[vinceroger69]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

have you got a picture? i havnt downloaded a service manual myself but a picture will tell us what they are

[Bibu]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

Ok this is the photo

[vinceroger69]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

yes they are both resistors what do they measure?

[Bibu]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

230 ohms

[vinceroger69]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

yes thats about right for them
https://www.easycalculation.com/phys...color-code.php

[budm]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

3305 and 3306 are resistors?

3304, 3305, 1005, 1003/1303 are part of the protection circuit, they are not the problem, they are not needed for the board to function.
You can see how they are used in the SCH I attached.

[Bibu]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

But it's possible that a 10 ohms resistors at the test Give 96 ohms?

[budm]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

If the resistor is marked as 10 Ohms and it is tested as 96 Ohms, then it is bad, you can also remove it from the board to test it also since any residue Voltage left on the board will also cause the Ohm to read wrong.
Which 10 Ohms in what section of the board?

[Bibu]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

3014 and 3017, are after the 3308,near the two mosfet.
I just tested it removed from the board, and the multimeter show 96 ohms

[budm]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

If you look at the SCH I provided, you will see that 3014, 3017 are 100R resistors which are 100 Ohms resistors, not 10 Ohms resistors.
So are you for sure that the MOSFET 7005, 7006 are really shorted out because you said it did not blow the main fuse.
Right now we need to fins out what DCV you have on the cold side of the power supply connectors.

[Bibu]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

If you look at the SCH I provided, you will see that 3014, 3017 are 100R resistors which are 100 Ohms resistors, not 10 Ohms resistors.
So are you for sure that the MOSFET 7005, 7006 are really shorted out because you said it did not blow the main fuse.
Right now we need to fins out what DCV you have on the cold side of the power supply connectors.

Budm but the resistors that i post Now in photo aren't 10 ohms? All calculator program tell this.
In what particular point of the cold side would you like that i test?

[budm]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

Budm but the resistors that i post Now in photo aren't 10 ohms? All calculator program tell this.
In what particular point of the cold side would you like that i test?

That is 100 Ohms resistor (Brown, Black, Brown) 5% MOX (Metal Oxide) Flame proof.

[Bibu]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

Isn't brown black brown GOLD and violet?

[budm]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

R3014, 3017
We are not getting any where here.
Recheck the MOSFETs and show the resistance reading between S and D.

[budm]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

Main power supply board connectors.
Do you have 5V2 (notes: this Voltage is generated by the power supply on the main board, chassis GND ref.)? See the large version of the SCH.
Do you have 25V_HOT (GND ref to negative leg of main filter cap in the DC primary)?

[Bibu]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

Main power supply board connectors.
Do you have 5V2 (notes: this Voltage is generated by the power supply on the main board, chassis GND ref.)? See the large version of the SCH.
Do you have 25V_HOT (GND ref to negative leg of main filter cap in the DC primary)?

no,with all boards connected i haven't voltage, no 5v and no 25V

[budm]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

The 5V is generated by the power supply on the main board, so you need to find out of the main board is getting the main AC feeding the 2-pin power connector on the main board or not.
It is time for you to upload pictures of the whole back side of the TV so we can see all the boards and how they are connected together.
What is the history of this TV? Was it hit by power surge? drops? someone worked on it before you? etc.

[Bibu]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

The 5V is generated by the power supply on the main board, so you need to find out of the main board is getting the main AC feeding the 2-pin power connector on the main board or not.
It is time for you to upload pictures of the whole back side of the TV so we can see all the boards and how they are connected together.
What is the history of this TV? Was it hit by power surge? drops? someone worked on it before you? etc.

the tv is mine, no power surge, no drops... some week ago decide to die, without motivations. no atoner people work on it before.
as soon as i will post the photo of the back side tv.
The strange is that the speakers are connected to the main board... if there isn't V, why they work?


i say alone. the main board take directly the 220V AC from the black connector of the power supply, for this reason the speaker works

[budm]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

"The strange is that the speakers are connected to the main board... if there isn't V, why they work?" That why are you 100% SURE that there are NO Voltages on the connectors of the main board, power supply board? There must be measurement errors.