phillips 42PFL5432d/37 TV no sound

[dsm482]

Hi


I fixed the caps 3-4 years ago.
TV was fine, but recently lost sound completely.

I replaced the board 715T2303-3 with same board.

only difference one board has C11 label on it.
the one that came supposedly tested has B11 label on it.

Whats the difference?

Still no sound.
tested speakers with 9v batterly they make sound.


power board is bad?
or do I got send bad main board.

I read all your posts nothing like mine.

I noticed the main board gets power from power board.
I got pictures and cable.. but no sound at all.

All setting I checked on TV and remote.
swaped cable boxes tested with other TV . thats not it.

Checked HDMI cable also.

Checked everything.. wires from main board all the way to speaker. all good.

Kinda bummed.

is there an amp on that power board that amplifies the sound that goes thru the cable to the main board?

I read manual not good description how sound is produced. I think it comes from main board..

I do get sound on outport for headphones..

WTH am I missing?

[R_J]

Re: phillips 42PFL5432d/37 TV no sound

Check if you have any audio from the headphone jack. The audio output ic is supplied by +24 volts from the power supply

[budm]

Re: phillips 42PFL5432d/37 TV no sound

Also check if you do have audio at the audio line out jacks or not.

[dsm482]

Re: phillips 42PFL5432d/37 TV no sound

there is no audio out jacks

there is audo from headphone jack, I put headphones and plugged them on I can hear the TV ..

WTF

[R_J]

Re: phillips 42PFL5432d/37 TV no sound

The headphone audio comes from U760, it is a lower power to supply the headphones, the audio signal then goes to the audio output ic U801 which drives the speakers. I don't know how you are going to trace the audio signal without a scope.

[dsm482]

Re: phillips 42PFL5432d/37 TV no sound

I replaced the main board, to no effect seems the problem is in the power board.
is there an amplifier ?
please read my description in the beginning.
I have a scope at work, but I can get replacement board if it seems more likely the problem is in the power board.

[dsm482]

Re: phillips 42PFL5432d/37 TV no sound

I get sound of the hadphones jack on the side AV


that means the mainboard is good..


can it be side port for the headjack thats stuck not allowing it go to TV speakers?
on this TV there is no thru the menu thing.

I believe when you plug it it takes the sound of the TV.

So it thinks its plugged.
power board works ,
I doubt the main board since I got second one and its doing the same thing.


How can I bypass it.?

[R_J]

Re: phillips 42PFL5432d/37 TV no sound

Ther should be a connector CN662) on the side av/cvbs/sv/head phone board, check the voltage on pin 13 with the headphones pluged in and when they are removed. I believe it should change from 3.3v to 0
Do you have both the +24 volts coming from the power supply?
What is the chassis number of the tv? is it TPM2.0U

[dsm482]

Re: phillips 42PFL5432d/37 TV no sound

the 13th pin on the connector going to the av board where its the hadphone jack is orange wire in color.
you can technically count both sides being 13th depending which way you count.
I checked both the bottom orange color is 13th pin has 3.27V all the time.
Headphones jacked in or taken out.

if thats the one you are tallking about that will confirm the hadphone jack has continous connection, and that will explain the missing sound.

its bad headphone jack ..

that will all make sense.

Can I bypass it anyway?
to test it. before I buy a small board.

[R_J]

Re: phillips 42PFL5432d/37 TV no sound

After a closer look it could be pin#14 on the CN044 plug on the av board that is the HPDET line.
Pin 13 is on the other end that connects to the main board and looks like it is the Yellow wire
This should be the board, You should be able to ground the HPDET line to see if you get audio

[dsm482]

Re: phillips 42PFL5432d/37 TV no sound

I get it , I will ground the yellow to ground..
that bypass it disengages to ground the board.

let me test it?

out of curiosity I saw the power board rating for 220v also. right next to the AC plug says 220v.

This TV I saw In Germany this means it can work on 110v 60 HZ AC and 220V 50hz?

Just curious if I can ship it and use there when am there..

[R_J]

Re: phillips 42PFL5432d/37 TV no sound

Many manufactures use universal power supplies that have an input voltage range of 90~264vac 50/60hz, but this main board tuner is ATSC and the main board is not multi standard so the sources may or may not work.
I believe the German tv standard is DVB-T

[dsm482]

Re: phillips 42PFL5432d/37 TV no sound

holy shit someone got some knowledge here..
you are right about the standards.. damnnn

let me test it first when I get home tonite. So I make sure.. Cross my fingers)
I think that's it. its the only thing that makes sense.

damn RJ u must have grey hair)

[dsm482]

Re: phillips 42PFL5432d/37 TV no sound

ok verified that's the problem..
ohooo got sound when I ground it.): yes damn it.


now question I got how can I jump it?
if I break the freaking thing off?

I never used headphones since new.
kinda feel stupid to buy new board ..

I am gonna search for it to see how much it is..
that little f...r had me chase stuff everywhere.

[budm]

Re: phillips 42PFL5432d/37 TV no sound

Did you try plug/unplug the headphone plug like 10 times, that may clean the switch contact for headphone detect switch?
You can also solder bridge the normally closed switch pin 6 and 7 of the headphone jack.
https://www.badcaps.net/forum/attach...3&d=1577935620

[dsm482]

Re: phillips 42PFL5432d/37 TV no sound

Did you try plug/unplug the headphone plug like 10 times, that may clean the switch contact for headphone detect switch?
You can also solder bridge the normally closed switch pin 6 and 7 of the headphone jack.
https://www.badcaps.net/forum/attach...3&d=1577935620

I tried the jack 50 times, its not doing it.

bridge how inside the headphone jack or bridge the pin 7 to pin 6 on the back of the board?

[R_J]

Re: phillips 42PFL5432d/37 TV no sound

After looking closer at the av board, you have a CRACKED TRACE

Bridge pins 6 & 7 on the jack, If that gives you audio, either leave it bridged or replace the jack.
I'm not 100% but it does look like a PJ31010-B

[dsm482]

Re: phillips 42PFL5432d/37 TV no sound

Bridge pins 6 & 7 on the jack, If that gives you audio, either leave it bridged or replace the jack.

how do i know which is 6 or 7 on the jack?
I got it apart i don't see numbers..

where do i get a jack so i can sother this to the board.

they sell these..? it will be functional and profesional .. they are loose..
I got good station at work for electronics..

Who sells these?

[R_J]

Re: phillips 42PFL5432d/37 TV no sound

The trace is cracked, The jack is likely ok. Solder a wire between the jack pin7 and then follow the trace and solder the other end of the wire to that point

[dsm482]

Re: phillips 42PFL5432d/37 TV no sound

they all move even the pins are lose.

Do i get replacement board ?
or there is trace with jack ports brand new that I can soother it together at work


or there is a pin 6 and 7 I can just bridge ..

Which ones are 6 and 7 ?

Sorry AAA .. kinda wanted to have some sound tonite while I watch tv