Forum > LCD TV forum

Philips 26pfl5522

<< < (4/6) > >>

fix2003:
panasonic is the maker
fm is the series
these are good low esr caps

all i use nowdays

as some unit will only work with low esr caps if you fit standard caps in there place unit may not work or give short life

sparky:
hi
you read his post you will find psu working no fault when
connected to another tv just check
dave

watteau:
Hi,
The usual cause of this effect is either faulty electrolytic capacitors, on the signal PCB,
or the image processing IC, (this is the IC thats feeds it outputs to the LVDS cable).
Try using the hairdrier, but shield various parts of the PCB with a piece of card, trying
to localise where the heat has the most effect.
Check the LT supply voltages when the fault is evident, and again when it clears.
If you have a 'scope, also check for noise on the LT lines.
Regards,
John.

vpauliakas:

--- Quote from: watteau on February 22, 2012,09:02:17 ---Hi,
The usual cause of this effect is either faulty electrolytic capacitors, on the signal PCB,
or the image processing IC, (this is the IC thats feeds it outputs to the LVDS cable).
Try using the hairdrier, but shield various parts of the PCB with a piece of card, trying
to localise where the heat has the most effect.
Check the LT supply voltages when the fault is evident, and again when it clears.
If you have a 'scope, also check for noise on the LT lines.
Regards,
John.

--- End quote ---

I have noticed that using a hair dryer to warm the internals reduces the time taken to turn on to 3-5 minutes, from 20-30. Will definitely try the suggested method to localise the fault. Thanks.

By the way, I just changed all the aluminium capacitors on the PSU to no effect.

vpauliakas:
Well this is weird. I have tried the method suggested watteu, using a hair dryer to warm separate parts of the boards to localise the fault. And while heating the area around the video processor and slightly below it, the video came on. What is unusual, is that even after being turned off for more than 12 hours, the tv turned on fine, with only a slight brightness flicker on the top half of the screen for the first minute or so.

I'll be leaving the tv as it is until it stops working again, as I don't have any means to diagnose it while it's working. Although if anyone can offer any insight into what happened, please share.

Thank you, everyone, for being a huge help.  :c017:

Navigation

[0] Message Index

[#] Next page

[*] Previous page