Philip 42PFL5609/98 - Intermittent

[wushumike]

The TV is giving intermittent problem as follows:
1) Stay in standby mode (red color indicator) and will not responds to the remote or power switch on the TV....Have to unplug and replug in supply multiple time and with luck will turn on.
2) When turn on (white color indicator) it will operate and suddenly there will be a glitch and the display goes haywire and speaker clutters....following will not be responding to remote ...have to power down again.
3)At time, from standby mode, pressing the remote will switch on (white indicator) but no picture or sound......again will not response to the remote.

Test Done so on PS board - measurement
a) PIC 1 : with standby light
b) PIC 2 : switch from standby to white light but no display
c) PIC 3 : when TV is working

I have remove and tested all the thru-hole capacitor and the reading are all OK.

Not sure if it is the Power Supply or Main board that is giving the problem... If it is the main board, how to or is it possible to rectify and repair.


Attached Photo :
ps measured point with cable connected to main board

PS Board Part No : 40-T8222P-MAD2XG

Seeking all the experts advice....

Rgds
Wushumike

[budm]

Re: Philip 42PFL5609/98 - Intermittent

Can we see the pictures of the whole boards?
Right now it looks like the main board is the problem.

[wushumike]

Re: Philip 42PFL5609/98 - Intermittent

Hi BUDM

Here is the photo of the ps and main board.
Oh btw i made a mistake the ps part no should be 40-IP42PS PW11XG


The main board is 40-T8222P-MAD2XG

Rgds

[budm]

Re: Philip 42PFL5609/98 - Intermittent

https://www.badcaps.net/forum/attach...0&d=1467222411
Unplug the TV from the AC outlet then heat up the main board, especially on the that metal shield where the processor is with hair dryer for 3~4 minutes, then plug the TV into the outlet and see if it will start properly.

[wushumike]

Re: Philip 42PFL5609/98 - Intermittent

Hi BUDM
Have already tried using hair dryer (hot air) blowing to heat up the ps. Board and main board....The problem still persist.
I thought I could simulate/isolate the faulty area... but did not workout.

Rgds

[wushumike]

Re: Philip 42PFL5609/98 - Intermittent

This is the glitch screen im talking about.

[budm]

Re: Philip 42PFL5609/98 - Intermittent

Well, the problem is on the main board some where, I have no idea where, there are some 3-pin regulator ICs on the main board that I can see from the pictures that you can check.

[Diah]

Re: Philip 42PFL5609/98 - Intermittent

yours Philips working with out any error code, this is one of stand by firmware issue.. which are in this early model chassis TCM3.2A of PFL5X series not able to upgrade it via USB, but there are working around you can try, here you have the service manual of this chassis TCM3.2A

[wushumike]

Re: Philip 42PFL5609/98 - Intermittent

Yes Diah,

Remember that I downloaded and updated the software via USB some year back...then the TV operate without any problem.

Anyway, I downloaded the version from Philip and reload it to the TV again although it was reported by the system that the version is the same.

I have also measured the voltages of the main board regulator when the TV is working and all the voltages seems normal...attached picture of reading.

Thanks for the schematic....but I don't know how to work around the problem if it is due to software.

[Diah]

Re: Philip 42PFL5609/98 - Intermittent

with yours photo of Firmware update, yours Pfilips should work Picture and sound with HDMI digital signal.. plug video source to HDMI 1 and post here photo please.

[wushumike]

Re: Philip 42PFL5609/98 - Intermittent

Nope...as mentioned only if I can get the tv to startup.

The problem is illusive....sometime no standby light at all, at time with standby light and when press remote, LED turn which but no display.

The thing is that even if I manage to get the TV to startup after multiple unplug and plug the supply.....there will happen when the screen suddenly go haywire and speaker starts cluttering with noise.

There are also times when the tv startup and suddenly restart again ....but system hang.

Even when the tv is not working properly, I did a measurement on the main board regulators output....the supply actually did turn on as I was getting 2.68V , 1.2V, 5V, 3.3V .

At least with all helps, it has been narrowed down to the main board problem and not the power supply board.

My TV mother board partnumber is 40-T8222P-MAD2XG 42PFL5609/98
I did a goggle search for the board and found selling
40-T8222P-MAD2XG 42PFL5609/93

Not sure /98 and /93 what is the different..... If I were to get the /93 is it compatible to my TV model

[dick_barton]

Re: Philip 42PFL5609/98 - Intermittent

My TV mother board partnumber is 40-T8222P-MAD2XG 42PFL5609/98
I did a goggle search for the board and found selling
40-T8222P-MAD2XG 42PFL5609/93

Not sure /98 and /93 what is the different..... If I were to get the /93 is it compatible to my TV model

Edit
Just thinking about this:
Is it possible that 98 and 93 are being misread?

[wushumike]

Re: Philip 42PFL5609/98 - Intermittent

Hmmmm....
I attach my tv mb photo and taobao snapshot...
Eeee... initially I thought was the year...but 93 is just too old

[Diah]

Re: Philip 42PFL5609/98 - Intermittent

/98 & /93 same chassis TCM3.2A and pin layout passed

[Diah]

Re: Philip 42PFL5609/98 - Intermittent

however this not official repair methods , and you are going to buy replace MB, why dont try to heat your kitchen Often to 250 degree ( No air reflow heat ) and place the MB for 5-10 minute then just open the often door and never move the MB till it cool down, and check.

[wushumike]

Re: Philip 42PFL5609/98 - Intermittent

Yap agree...Just googling around....
I have removed the aluminium shield to take a look at the processor area...no dry joint or bloated cap...I have also use the same heat blowing method.but problem still remain.
As the fault is intermittent...I really have no ideal what is wrong...
Frm the schematics, there is this standby mode processor...could this fail?..but then there are firmware burn into the processor...so no way to replace .

[dick_barton]

Re: Philip 42PFL5609/98 - Intermittent

Do you kmow anyone who could reflow the board for you as Diah suggests?

[wushumike]

Re: Philip 42PFL5609/98 - Intermittent

Nope..I got no resource for IR reflow.
I will try Diah method of burn-in today to see if any good.
Will update status.