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Service manuals & datasheets => CRT TV forum => Topic started by: charlie on November 10, 2007,14:39:42

Title: philips capacitor
Post by: charlie on November 10, 2007,14:39:42

Hi i am confused now and need the correct info on the capacitor at ref 2455. I have the service manual for this model which is 28pw6506/05  with a L01.1E chassis.  Now my manual says the cap is 47uf  20%  25v    But several forums have said replace it with a 47uf   30v.  The problem i am having is the set keeps going back to standby when it first turns on!  this is because it cuts itself off because the power is to high!!!  now  if i replace that cap with 30v and not 25v  as it says in the schematic!!! wont that cause the same problem, or even make it worse.  PLEASE  there must a TV guy out there who knows what he is talking about?  

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Post by: ernie on November 10, 2007,19:43:35

the voltage at 30 will be ok.as long as the 47 mf is right it dont matter that the v is a bit higher as long as it isnt lower..if you suspect that cap the loptransister may be gone.check the tube isnt arcing in the neck when you turn it on

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Post by: charlie on November 11, 2007,08:37:07

Thanks for that ernie, and if it si arcing?   the picture at about 7/8 near the  top right hand side bows in! i have tryed to reset but it does not want to display correct.  I am waiting for bits from CHS so when they get here!!! i will check the neck, then try with new bits in.  Regards Charlie

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Post by: ernie on November 11, 2007,20:41:51

i was thinking about your first post where you said it comes on then goes back to st/by.the tubes are known to fail and cause that.this is why i said is it arcing in the neck.there is a fix for that if that is the problem as i have just done it on a sanyo and a panosonic which have phillips tubes.try the parts that you get and chack the line drive transformer.if you find out its the tube i will explain this fix for you.

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Post by: charlie on November 12, 2007,06:49:34

Thanks for that ernie  I have taken backoff  and can find no traces of arcing, when u say the neck i take it u mean  either where it opens out by the coils or the white coils part way back the neck that has the join bit with coils!!  it has a glow right at the tip inside the clear part but that is as far as i know correct? I am thinking back to the days when we had lots of glowing lights in the tvs lol   How do i check the line out? yes i know it is the service manual somewhere!!!  Thanks for your help so far. I am looking at the cap 2455 and the bc337's  because that seems to be the most common fault on forums i have been on. Regards Charlie

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Post by: charlie on November 12, 2007,07:37:25

P.S  the error codes i had in sdm first were 3-5-11-2-8     i cleared the buffer and that was several weeks ago.   Now they are 8-2-3-5-11   the same but diff order, 8 i know is the last one to go on etc.  I expect to see the 5 because thats where i think the main problem is on startup!!  I am givving up on the other forums because i get answers on here!!!  thanks guys!  ok now for the silly one, can i use a multi meter without the the high voltage probe to discharge the tube? as in fig2-1 page 2  I want wipe the dust off but i dont want it to bite lol