Philips 26pfl5522

[vpauliakas]

Hi,
 

I have a Philips 26pfl5522 and when turning it only displays a blue screen with horizontal lines, sometimes going to a grey screen. After about half an hour it starts to function normally. If turned off and turned back on right away, it keeps on working normally.

Had a look at the capacitors, and none seem to be bloated. Also checked the service menus and no errors are displayed.

Which component could be causing this, the main board, the power board or the screen controller? I have seen a message in a different post which said a similar problem was solved by replacing the capacitors on the power board (here's a link: http://www.tv.quuq.org/forum/index.php?topic=4950.0). Could this be it?

[fix2003]

caps do not always bloat
replace these in psu use good low esr version panasonic fm or sim
2- 680uF 35VW
1- 680uF 25VW
1- 680uF 10VW
4- 680uF 16VW
1 2200uF 10VW
2- 330uF 16VW
1- 330uF 35VW

[vpauliakas]

caps do not always bloat
replace these in psu use good low esr version panasonic fm or sim
2- 680uF 35VW
1- 680uF 25VW
1- 680uF 10VW
4- 680uF 16VW
1 2200uF 10VW
2- 330uF 16VW
1- 330uF 35VW

Thank you for your help. Are fm and sim capacitor series names or abbreviations of some sort?

On a related note, could someone recommend a good online store to get these, which ships to UK?

Edit: Just inspected the capacitors on the PSU (Model: PLCD190P3) and have found these capacitors:
2x 1000uF 10V
3x 470uF   25V
2x 680uF   35V
1x 100uF   50V
1x 100uF   450V
1x 100uF   25V
2x 22uF    50V

Did I miss any? Seem to be very different from the ones posted above.

Have checked the stores like mouser.com and while they stock the required components, shipping costs to UK seem a bit high. Does anyone know of a good electronics store based in UK, or at least one which would offer reasonable shipping costs?

[Turnip]

Hi there,

Why not Maplin ? - amazed at their stock coverage when no-one makes/mends anything, anymore.

If more serious, try Wiltsgrove - good on price, if not on range - Chris.

[sparky]

hi
if still same prob screen
dave

[vpauliakas]

hi
if still same prob screen
dave

What do you mean by screen? The lcd controller board?

[sparky]

hi
the LCD Display
dave

[vpauliakas]

hi
the LCD Display
dave

Thank you for your input, although could you please explain this in more detail? The display itself is intact and it displays the image without any problems once it starts working. I was thinking it is a problem with the boards controlling the panel or the power supplied to them, and I expect to be proven wrong. I came here to search for all possible causes and solutions and I am interested to hear more.

[sparky]

hi
try and post pic of the fault
dave

[vpauliakas]

Here is a link to the album showing the progress of the TV turning on.
http://imgur.com/a/dYrXJ

[sparky]

hi
another way is connect tv to another tv thro scart to scart
if no fault on other tv  rules out psu and mainboard think
tcon is built in to screen
dave

[vpauliakas]

I have tried scart to scart as suggested by Dave. I didn't have an aerial plugged in, but the graphical menus showed up without any problems on the other tv. I was hopping for a psu fault as that is the easiest fix, could still be at fault? If not, what repairs am I looking at? Tcon (timing control board?) was mentioned, can that be replaced without replacing the screen by some means? Is that the little the little circuit board above the main board, under a foil cover and connected by LVDS?

[sparky]

hi
post pic of inside tv
dave

[vpauliakas]

Here is a picture of the inside:
http://i.imgur.com/GD6A9.jpg

Another observation - this fault seems to be heat related. If I use a hair dryer to warm the inside of the tv when turning it on, it only takes 3-5 minutes for the video to appear, instead of the usual 20-30 minutes. Could it be a loose connection on the lcd controller board which closes when the metal casing extracts when warming up? Or is it some electrical component changing its characteristics when warmed up?

[davenjax]

hi there not been on here a while but the fault you describe does sound similar to what i had id be changing the psu caps first then go for the lvds board if no joy  rgds dave