Samsung LE40R88BD Clicking Relay

[daz]

there is always another option, if you haven’t got a clue about electronics, instead of guessing at the fault and risking writing off your set, you could always take it to your local TV repair shop many of which have decades of experience, as supporting your local TV engineer (the few of us that are left) will stop us all going bust, taking up drink (well more drink than usual) and starving to death.
Just a thought
Daz 

ahh that felt better, off down pub

[AdyAde]

there is always another option, if you haven’t got a clue about electronics, instead of guessing at the fault and risking writing off your set, you could always take it to your local TV repair shop many of which have decades of experience, as supporting your local TV engineer (the few of us that are left) will stop us all going bust, taking up drink (well more drink than usual) and starving to death.
Just a thought
Daz 

ahh that felt better, off down pub

Quite simply because there aren't any local repair shops in my immediate area, the nearest is 22 miles away, and when asked how much they said £65 just to take the back off !

The TV isn't 1080 so isn't worth an awful lot anyway.

[ThePrawn]

Hi all

I have one on the bench at the moment. The usual caps in psu problem. But I can't get it to restart to reset the eeprom settings. I'm guessing that shorting sda and sclk pins doesn't really reset these tvs or there is another fault causing it to trip off.

Does anyone have a hex dump, the nearest I got so far is a le32r72 which is an older chassis, so I want be using that. I try reading it and rest it to 0xff next week and see if that helps.

Quite simply because there aren't any local repair shops in my immediate area, the nearest is 22 miles away, and when asked how much they said £65 just to take the back off !

AdyAde I'm surprised that there aren't any closer as your in Middlesex.
If you want us to have a look, I'm probably only 10 miles away (Egham) and we don't charge to take the back off, just ask how much we can charge before needing to give you a call or quote (saves us taking the back off twice). Maybe we should charge as people do abuse it, costing us money and time? We are a bit part time these days, we have to make a living elsewhere, but we are still kicking. Maybe I should join Daz for a drink 

Sean

[sparky]

try this it does work
sparky

     Re: Samsung LE40R87BD LCD TV - relay clicking repeatedly but wont start
« Reply #4 on: April 25, 2009,06:16:08 » Quote 

--------------------------------------------------------------------------------

Hi John and RB
Set now up and running. It was a case of a corrupted eeprom. Thanks John for the info.
For anyone with the same problem the procedure is as follows.
On this model the eeprom in question is IC 1803 (24C256) 8 pin smd and is located on the underside of the main board near the common interface. The clock and data pins are pins 5 and 6 and are identifiable by the 100 ohm smd resistors connected to each of them. Fit a shorting link (on long wires) between the pins. Reassemble the chassis. Switch on and then remove the short. Bring the set out of standby. Now access the service mode as follows-
Using the remote control, switch to standby, press info, menu, mute and power. The set should start and display the service menu. Using scroll keys select item 8 and enter by scrolling right. Select "tuner" and set to auto. Revert to previous screen by pressing menu. Now scroll to "reset" and enter by scrolling right. The set will revert to standby. Power back on and tune in stations.                                          Thanks again tv john for the information.

John.

 
 
« Last Edit: April 25, 2009,09:41:35 by Contrast John 
 

[ThePrawn]

Thanks Sparky for info.

I did try all that before posting. I used a length of cable to short pin 5-6 at start up. I tried all sorts of timings, with no luck (several hours later).   :wallbash:  So I guess shorting pins is not 100%

I read the eeprom today and then reset it to 0xff that worked. The system reloaded it with I guess the factory defaults for this model. I then reset via service mode, the tuner was already on auto. I had to half remove the ic to rewrite it as the system held the Write Protect High, disabling any writes  

I've attached the eeprom dumps for the non-working and working eeproms. The working one should be tuned in and setup for London tv channels.

A note of warning to any DIY person, this particular TV has an extremely dangerous power supply as it supplies the back lights with 1.5KV at 72mA. :diablo: The hazard isn't that obvious(only a couple of small warning HV stickers) and this is the first LCD I've seen with one, normally they us 12V or 24V and use the inverter transformers to up the voltage to the CCL.

Sean

IC803 working dump for Samsung LE40R88BD is le40r88_wk.e2p

[ks246]

hi all, shorted out the eeprom as in the below quote, the standby light stays on constant, and the blue light under the samsung light flasshes in response to pressing of buttons on the remote. screen still does not come on?
(reverts to the standby light flashing when plug switched off and on again)
in the quote below it says to press info, menu etc, does this mean press one after the other or all at same time?
any help appreciated.
cheers keith

try this it does work
sparky

     Re: Samsung LE40R87BD LCD TV - relay clicking repeatedly but wont start
« Reply #4 on: April 25, 2009,06:16:08 » Quote 

--------------------------------------------------------------------------------

Hi John and RB
Set now up and running. It was a case of a corrupted eeprom. Thanks John for the info.
For anyone with the same problem the procedure is as follows.
On this model the eeprom in question is IC 1803 (24C256) 8 pin smd and is located on the underside of the main board near the common interface. The clock and data pins are pins 5 and 6 and are identifiable by the 100 ohm smd resistors connected to each of them. Fit a shorting link (on long wires) between the pins. Reassemble the chassis. Switch on and then remove the short. Bring the set out of standby. Now access the service mode as follows-
Using the remote control, switch to standby, press info, menu, mute and power. The set should start and display the service menu. Using scroll keys select item 8 and enter by scrolling right. Select "tuner" and set to auto. Revert to previous screen by pressing menu. Now scroll to "reset" and enter by scrolling right. The set will revert to standby. Power back on and tune in stations.                                          Thanks again tv john for the information.

John.

 
 
« Last Edit: April 25, 2009,09:41:35 by Contrast John 
 

[ks246]

anybody??

[ks246]

wooohoooo!!! sucess!  keep trying folks, i must have done it 50 times before the set fired up, it is currently searching for channels!!! hope i dont have to fiddle with many settings! or ill be back!

[dad2009]

I'm in this boat. I've tried ALOT of times. I get everything as described except for any kind of life in the screen. At no point (during the shorted startup, the normal startup or the service mode palaver ! ) does the backlight come on.  Am I right in thinking, if I never see the backlight even attempt to come on I'm not going to get anywhere. I ask because I've get the feeling the service is mode is there but I can't see it. This TV has made me paranoid !

[michael first]

Hi,
Are you sure the inverter is supplied with the right voltage and attemps to start?If not, could be defective,unfortunately.Try to put close to a transformer a neon small bulb,when you power up the TV;if the bulb lights up for a while the inverter could be safe;if so,think about the micom!
Happy new year!Michael

[ThePrawn]

Happy New year. 

The one I repaired, the backlight never came on, just the blue led on and then flashed and off again. Relay clicking in and out from 10sec to 1min. All voltages read correct apart from the the 1.5KV inverter supply which didn't fire up.

After reprogramming, erase(0xffh) or replacing EEPROM with a new blank one, TV worked fine. I think shorting the pins only works if you get lucky. The timing of the short maybe critical as I use to regularly reset laptops EEPROM for asset companies and found the timing/sequence was important. But didn't find the sweet spot of the one I had in and needed to clear the bench.

Good luck

[FSMike]

Hi all,
Just wanted to say many many thanks to all the people who responded to this post...
Switched the TV on this morning and was greeted by nothing but a clicking sound. Did a quick Google, and found it was a common problem with these sets.
Before I go on, I'd like to let you know that I'm a complete novice with electronics, if something's whirly and oily then I'm fine..... electrickery is witchcraft to me.
Anyway, found loads of info on various sites relating to popped inferior capacitors, so I whipped the back off the set and hey presto, black stuff leaking out of 2 and 2 more ready to burst. they were as follows; CM817, CM811, CM812, CS806 (10v 1000uF) all on the power supply.
Toddled off to Maplin, where they had two 16v 1000uF's left in stock, and the local TV repair shop (who charged me £6 for another two  :mad: ) Went home and popped them in.
Turned TV on, nothing... aaargh, more googling..... came across this site and the info on the eeprom.
I soldered a bit of wire to each of the pins, and after about 8 attempts (various timing of removing the short) the set burst into life. For those that want to know the timing of this, I plugged the set in and removed the wire after 1 sec.

So once again, a big thanks to everyone, esp. Sparky who put up the info on the chip. I owe you a virtual beer matey.
Many thanks, Mike.

[dad2009]

Thanks all, it's now working. Owe you all - big time. This is as detailed as I can go ( after replacing 4 caps ). The critical part seems to be the delay ( see point 3 ), thanks to Mike for this ( my name's Mike - a lot them around ).

1. Short out the eeprom pins 5 & 6 ( the two legs with the resistors ).
2. Turn on the power.  - Instead of the usual noticeable relay click, you get a faint click, the backlight stays off, nothing else happens.
3. Wait around 1-2 secs ( anything longer than this NEVER seemed to work ).
4. Remove the short
5. Press info,menu,mute, then power - In that order individually, one at a time.
6. TV should come on with noise picture and the service menu.
7. Navigate to reset to go back to factory defaults and you're away....

Cheers again everybody - I was on the brink of giving in to Samsung....

[goman]

Hey guys im novice to this stuff but have the same problem with my samsung ln46a650a,power cycling as soon as it gets power, will the steps listed in this thread apply to me as well? im not about to spend 400 to samsung on a tv that is 1 yr 6 months old....any help would be much appreciated.

[wilko121]

Hi,

Does anyone know what to do as I have changed the capacitors and it still does exactly the same, still clicks on and off? I rang samsung and they dont giive a monkeys. Please help!!! Im TV less