Mulja tv repair portal
Equipment Repairs => LCD TV forum => Topic started by: StormyC on September 12, 2011,09:44:27
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Hi folks, :sign0144: im hoping for a little assistance.
I have an Acoustic solutions TV LCD32761HDF stuck in standby, solid standby light. After some searching it looks like its the 17PW20 V2 PSU that is at fault. Ive removed the board and can see a 100u 50v capacitor (C835) that has a bulge so i need to replace that, however, what i dont know is should i replace anything else prior to testing after i replace C835... Any advice on what to test (and how) would be greatly appreciated.
Incidentally, ive taken a reading accross the large capcitor C819 and its 320v but the circuit diagram indicates 400v - does this indicate somthing else is wrong?
Many thanks..
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"After some searching it looks like its the 17PW20 V2 PSU that is at fault."
Do you mean you serched for the psu or searched for the fault?
regards
ANdy
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I did a search on the internet for the common cause of this fault. So I'm assuming the faulty part is going to be the psu. I did think that the bulging capacitor was the give away.... Am I wrong.should I look else where...?
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would get psu repair kit from ohm supplies or Charles Hyde but fault can be AV board good luck Dave.
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had them as low as 300v at the smoothing block and they've still run the voltage at the smoothing block i assume will be proportional to the ac input voltage . stick a new cap in and check for the relative output voltages if you've a diagram it'll show how much and where about the only good thing with most vestel psu's is you usually get away with not having to load them to test them... good luck SMPS's can be a pig but you might well be lucky
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have you checked the blue cap c877/878..15nf.630v.normely they buldged on the sides,so you need to take them out to check..
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Thanks very much for the replies.
Just looking at those blue caps you mention - they look fine - just the C835 that looks bad. When I get the chance I will replace it and see what happens. (working all hours atm - even at work now!).
Again thanks all.
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A quick Question regarding the circuit for the power supply.
The pin outs - so Im sure of what im testing - pins for PL801 1 thru 5 are 24V and 6-10 are ground?
Very much a novice so any help appreciated.
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Yep. They just used multiple thin wires instead of one large one to deliver the same amount of current.
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Me again....
OK, as the power supply had that visibly bad cap I replaced it but I wasnt able to get anything out of the 5v pin(s) so instead of paying £25 ish for the kit i went ahead and bought a new power supply, the exact model, 17PW20 V2 (£35), popped that in but still have the exact same fault :41:.
Im confidant that the new power supply is working fine as I was able to get all the readings correct..... I think it was because of my noobness that didnt test the old one properly....
OK the BIG question: Is this TV a scrapper, is there somthing else easy to check or should I take it to a pro?
:c017:
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what main boards in it mate sometimes the vestel 's suffer from processor failure so could weel be that or a duff eeprom give us the number and ideally a pic and maybe me or one of the other similar old farts ( no offense Chris ! ) will have one you can try for p&P cheers
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:13:
Thanks!!
I will do that later today, would be nice not to shell out for brand new TV...
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Pictures, as promised...
Hoping you can help...
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Hi Jimca,
No offense - But just a wee phart (You can never trust 'em, these days) - Chris
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17MB22-2 Pcb Main (32 inch) Hitachi L32HP01U .....
CHS Part No.: 12029ZW
Availability: 7-14 Days
£ 238.82
ouch!
I'll have a look later see if i've got one cheers
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Hi I found one which I think looks pretty much the same as yours, I cant guarantee its providence but then its unlikely I'd have kept it if it was goosed double check this is it and if you want it pop a tenner in my pay pal and i'll post it off to you.
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Hey jimca007,
Id love to give that a go.
Please see your private messages.
:c017:
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Just noticed, there is a differance, my board doesnt have a PC-in socket...
Can't see this being too much of a problem can you? - there is space for it, i just have to cut out the slot....
Thanks again for your help!
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I've got another one without a D-SUB socket you want that one instead?
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I will leave it to you which ever you think best. ie the one most likely to work. *grins*
I've tried to deposit the £10.00 but cant seem to be able to without creating a paypal account, not something I want to do. Can send driect to account if you could provide info (via pm ofc)
Many thanks, fingers crossed this will do the trick...
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Hey jimca007,
Did you post that board? Not recieved it as yet, as its been a week getting a little concerened..
Can you let me know when you posted it please?
Many thanks.
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hi mate spoke to the secretary ( otherwise known as the wife ! ) she told me she hadnt been able to post it till friday so I apologise for the delay and shes been given a good spanking ! :33:
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Hey jimca007
Still not arrived Jim, how was it posted, any proof of postage, or do i seek a refund?
All the best.
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I'd suspect the postal system which is known to grind to a bit of a halt with regards to parcels ...this close to Christmas ..
Jim is as good as his word ...
If he posted it ...it will come ...
..almost sounds like a line from field of dreams :wink1:
rgds
Evan
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i've got 1 pm me
shaun
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Certainly don't doubt his word Evan and yea, Thought it might be the postal system, which is why I gave it 7+ days before griping again...
I wouldn't be so pushy since the cost or the board is huge and Jim is letting me test it via replacemet for so little.... However, if the TV isn't repaired a new one will be purchased shortly so its owner can play new games etc. on his new PS3....Christmas - 'Baaa humbug'....
So it will all be a waste if the part doesn't arrive soon..
Any info Jim?
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Jim, its still a no show....
I will get the kind person that helped me send the money to you to start the refund procedure...
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Refund procedure started... dispute logged with paypal.
Shame really...
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Bump :dubbio: