Mulja tv repair portal
Equipment Repairs => LCD TV forum => Topic started by: chrissie jones on September 04, 2010,09:01:37
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THIS SET IS DOING MY HEAD IN.STILL DOING THE SAME SWITCHES TO GREEN THEN BACK TO STANDBY.RELAY CLICK OMCE. :41:
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hi
how about a pic of panel were fuse sits
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the one i was told it was it was'nt.please can someone helpp!!!!
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Hi, CJ
Green is sort'a interesting - especially if it's someone else's telly. You wouldn't think a tube fault, as tubes aren't normally individually coloured with LCD sets.
Revert to S/by is usually due to some error feedback from Micro to PS.
Might be interesting to disconnect the LDVS cable and see what it does to that green screen - if still green - well, another can of worms we can poke through - Chris.
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hi
do you mean the standby light starts green then
red?
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Hi Sparky,
He said that a while ago -
Curiously folks then went on to Sharp peccadilloes - one does, foolishly, I did too,
So, no screen illumination, and just a mean Green/Red - LED
No Idea - Chris.
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Chris have you tried forcing set on and getting service menu up as previously mentioned? Scroll down to EEP setting, does it ask you to clear, if so clear it. Check all backlight connectors are tight. Tighten any screws on inverter. Also backlight tubes can cause fault.
Dave
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hi
over weekend lc32d44e same fault one of tubes gone black
then another cust brought in lc37gd8 same fault one of tubes black
bad day the later one will be scrap,the newer one 18mths old cust
going to try quoting the sale of goods act at the local shop if they find receipt
dave
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Hi Sparky,
So you're saying crap tube life caused 'Revert to S/by' ? sounds awful Sharpish - Chris.
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got in to service menu,got leter k.now how do you shift.thanx chrissie jones.
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Quote from
contrast john not me sparky further down
the listings
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Hi All
Managed to sort this one out. The lamp error counter had reached 5 which means the set needed to be started in service mode (hold down input and vol - on tv set whilst applying mains until the letter K appears on the screen, after which press vol - and prog - on tv set to get the service menu). Had no joy doing this though because the ccfl driver IC (BD9883 smd) was going into protection mode and preventing the backlight from operating. To get round this problem I overode the protection by fitting a shorting link across C7558 (smd capacitor) located near the IC. The set would now start in service mode.
Found that there are some test patterns available in the service mode one of which is a grey screen. Selecting this option showed the problem. The area across the centre of the screen was darker than the rest indicating the centre pair of ccfl tubes weren`t working. This chassis uses 10 tubes driven by 5 inverter transformers mounted in line with them, so before embarking on a tedious stripdown I ruled out the possibility of a duff transformer by swopping the centre one with one of the others. No change of course, so I dismantled the unit and checked the tubes and their holders for any visible problems. None were apparent but replacing the tubes cured the problem. Just needed to clear the lamp error and remove the link
Hope this info might be useful and thanks to the above contributors for the input.
Regards
its in the above quote how to set up