Mulja tv repair portal
Equipment Repairs => PLASMA TV forum => Topic started by: snopy44 on April 24, 2010,13:15:48
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hi soz posted my message in the rong section need help i have the above tv and what is happening is when you turn up the volume to say over 30 the tv goses in standby but if the volume is left low the tv works perfect i have made a lead up to connect the headphone plug to my suround sound system and muted the sound and it let you turn up the volume with no prob has any one any idea what it could be and were i should be looking IS THERE NO 1 AT ALL THAT COULD HELP OR POINT ME IN THE RIGHT DIRECTION :wallbash:
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:blum: It is clear that the power supply circuit is faulty BF.
to give volume, the consumption of this stage increases and the ripple
o have the source that the unit goes into standby.
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im new to all this and just getting into my plasma tv repairs i have just repaired a philips 42pf520d/10 that just kept going into standby and it was down to a specker which i change and the tv works fine with no probs at all could not beleve it was just a specker so could any one tell me do they think it could be the same prob with my 42pfp5532D/05
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Hi,
I would go with Tello 6, suspecting duff/bulgy caps in the PS as the problem, or perhaps low internal/external speaker impedances causing excess current and cut-out - Chris.
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have check all the caps and there is no evadence of bubbling has i said if you mute the tv the set will stay on with no probs without going into standby and i have made up a lead that i can plug into the headphone socket and into my surround sound and has it says in the user manual when you plug headphones in mute the tv and by doing this you can turn up the volume without the tv going into standby so all i can think is it being the av board as this controls the sound and video can any one help has this is all new to me and have bin told it has to be somthing to do with that board
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try unplugging the speakers and see if the fault still occours, if not check with different speakers (same impeadance),
but being a philips this stinks of a software glitch, try entering service mode check for error codes, perhaps preset volume limits to high? try reseting eprom,
good luck
daz
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Hi,
As the man says, with headphones no probs. Still feel PS might be the problem - unusual, but with this (Philips) one, who can say.
Philips - Dutch inspred, is as different from our recent 'Eastern normal' as in those wicked French 'EMO' (Eurosonic) tellies of the early 70's - Chris - had to try mend them, after suffering from all those Philips radio drive cords of earlier years.
Still nearly sensible - sometimes, just hate Philips, and most things Duch, for ever - Chris
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thanks for all the replys ok here gose up date got a board from a friend just to try as have check and double check power board so as i said changed the av board and the tv works fine BUT the board that i got from a friend has no freeview tuner and no common interface slot reader both board numbers are the same and as i said the tv works fine but what i want is to find out what on this board controls the sound there must be someone out there that has done some work on 1 of these tvs the board number is 3139 123 62614 WK713.5 and thank all
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has no 1 out there any ideas at all has to what on the audio vid board that i have mentioned controls the audio
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up date have changed the board and sound is ok but the wide screen mode is not working as you only get the band down the left hand side of the screen and not down the right carnt understand as it is the same board number as the 1 i took out and was from the same tv model can anyone give me any advice
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come on guys someone must has some idea please :thumbup:
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sets with the same model no and av pcbs often use different screens, are you sure both sets had the same screen in them ?
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dont know was told from were i got it from that is a well known place that sells parts mensioning no names that it would work and apart from the wide sreen mode it dose i have look over it with a magnifi glass and all the parts are the same on the board and nothing looks diffrent just dont want to keep spending money i dont have to i know i may be to fussy as the board i got from my friend that works but has only an anolog tuner just want the tv to work the way it should :wallbash:
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ok, there are two options, the board you have is duff or the software needs to be changed to match this screen. to check this you will need to find out what chassis the set is, this is printed on the label on the back of the set, i THINK its a lc7.2 ,below is an address for the service manual, first easy thing to check is the option codes (printed on the same label) enter the service mode and confirm they are the same,if this dosnt fix the problem you then have to compare parrameters are the same on both board, you will have to refit the old pcb and note all the parameters,this is going to take some time.
the service manual will be a great help,read it first, be warned if you make adjustments that are incorrect you may make the fault worse,
good luck
daz
http://www.scribd.com/doc/9661433/LC72E-LA
ps its always possible there was a problem with the software on your old pcb
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just noticed the audio amp ic used on the lc7.2 chassis is also used on many a vestel chassis to which they cause lots of problems, perhaps this is the cause of the original fault, now you have two pcbs you could try swopping them.
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thanks daz for the repy have had a lookat that link and it is for a lcd not plasma do you know were on the board the audio ic is and a board ref number as this is what i have bin asking for from the start and thanks daz top guy
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hi, can you confirm the model no and chassis no, both on the white sticker on the back of the set, the chassis no is in a small box and starts with a bold letter S, so i know exactly which set were talking about. the main av pcb that you have changed can be used in both plasma and lcd sets, hence the need to make sure the software is correct. get me the chassis no and ill be able to tell you which is the audio chip tommorrow.
daz
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thanks for that i will have to take the tv off the wall to look it up just as a mater of intrest then if i was to find the chass number could i up date the software on this board to make it work and if so how hard is it to do and is there any way that you could explane it to me in lay men turms and thanks daz :thumbup:
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Hi,maybe the new board was taken from a tv with a different BOM,so you have to write into the tv's memory the right display option code;look at the small label on the bottom corner of your tv,you'll see a three digit number,then with the tv on,digit on the remote '062598MENUxxx' where 'xxx' is the above mentioned number;after, the tv will go into st-by if everything was done correctly.Turn the tv on and see if the image is right.Hope it works.
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hi thanks for that did as you sad put the code in 062598 followed by menu and 083 that is stated on the paper lable but no joy no mater what i do i don,t seem to be having any look there must be somthing that can get it to get it to work right :loool: