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Samsung LE40R87BD LCD TV - relay clicking repeatedly but wont start
SubSonix:
I still haven't received my replacement eeprom, but I'm looking at the board now, and there is actually two 24c256's. The second one is at IC3202. Can someone please verify that this one isn't a possible fault too?
GRAHAM RICHARDS:
Our workshop repairs approxametly 4 of these sets a week with the clicking relay or stuck in standby symtoms.
The cause is excess noise on the supply lines(in particular the 5v supply).The electrolytic decoupling
capacitors begin to suffer from electrolyte dry out,which increases there esr(electrical series resitance).This makes the casing expand.Because of the noise on the supply line,this in turn corrupts the memory ic(eeprom) in 90% of sets.The cure! Replace the 3 or 4 (depends on psu version fitted) 1000mfd/10v capacitors(16v are better)110 degree.If it still has the clicking relay symtom(or it may work with odd symtoms)then the eeprom will
have to be replaced on the main pcb,its a 8 pin ic on the top right of the board,mounted on rear side(top left looking from behind the board).You have to fit a blank eeprom.Then refit panel & swich on,it will take 15-20 seconds for the flash memory to upload to the eeprom.The relay wiill click once or twice before the picture appears.Im going to introduce a kit of parts with instuctions very soon.Watch this space!
monstermonkey:
--- Quote from: daz on May 28, 2010,04:32:03 ---Well said john!
I love this site and always try to help where I can, but I do question the wisdom of encouraging Joe public to bugger around in the back of their TVs, not only from a health and safety point of view (sure someone will get sued sooner than later) but also from a financial point of view as I don’t know of an engineer making much money these days, decades of knowledge given away for free to Joe public is that wise ????
PLEASE DISCUS!
--- End quote ---
Not everyone who is 'Joe Public' doesn't understand or respect the dangerous nature of working on TV's or electronics in general.
I'm technically a 'Joe Public' as I don't repair TV's for a living, however, as an ex Electron Microscope engineer who has moved on to more lucrative pastures, I do fully appreciate the care needed when working with high voltages (400KV in a TEM anyone?)
The way I see it is if you have a 32" Samsung TV that's worth £150 second hand working, no one is going to spend £50 just to have it looked at when they can bang it on eBay and get £75 for it as faulty and then pick up a new set for around £250, this gets the faulty sets out in the public domain which undoubtedly leads to people picking them up and then looking for help on how to fix them.
Time goes on, things change - that's how life is, you have to adapt to keep on top of these changes - if more repair people did a no fix, no fee you'd get more business.
sparky:
then people will live on thin air and disappear
or repairing tv's for free
Turnip:
Hi Sparky,
Good thought, but as local chaps who mended tellies for a decent price had to get a real job some 20 years ago when folks wouldn't pay for their sharp suits and nice motors, I found it the biz to be in with friends in low places (I never had any real taste- you guessed)
I could be last TellyBasher in this Turkey Twizzling region - well, no-one else on Quuq talks real 'Norfolk'
'Bootiful' (last time - fairly honest) - Chris.
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