Forum > LCD TV forum
Samsung LE40R88BDX/XEU
zorgan:
guys, I think I may have a corrupt eeprom also on this exact model......
LE40R88BDX/XEU
My Exact Version is the SP02
Caps all seem fine, also usually if it is the caps the problem is progressive as they get worse.
I would like to try to reset the eeprom using pin shorting but not really clear on the instructions,
does anyone know of a good source for an outlined step by step guide?
I recon I am experienced enough do physically do it, but would need to follow precise instructions.
:sign0144: so i :051bye: to everyone it seems like a nice forum to be a part of.
TIA for any help you guys can offer on this Samsung Model which seems to have two main common faults
1. failing capacitors on psu
2. failing eeprom data on mainboard
KROB:
Hi all,
I have repaired nearly 100 of these and in almost all cases the eeprom has been corrupt due to noise on the 5v line caused by the defective caps in the PSU. Replacing these caps is never normally enough in R87 and R88 models (most other Samsung models rarely damage the eeprom!), I now always replace the eeprom as a matter of course. "Resetting" the eeprom rarely lasts as a cure, as the eeprom invariably fails at a later date.
You can simply fit a blank 24C64, which is easily and cheaply available (around 50p from CHS), there is no need to fit a preprogrammed eeprom in these sets or to copy data. When you first switch on the set it will go through a coupkle of on/off cycles, during which you will worry if the fault is still present. This is simply the blank eeprom initialising, nothing to worry about. After that all should be well, with sometimes just a tweak or two in the service menu.
This is my first post on this forum, I hope that I can be of more help in the future.
Ken
zorgan:
Hi KROB! :051bye:
I have my parents tv here, its just clicking on and off, nothing else happening.
do you think I should turn it on and wait 10mins see if it corrects itself?
or would I be doing it more harm than good?
KROB:
You are having a laugh..............aren't you???????
To suggest that you leave it for 10 minutes to "correct itself", on an engineering forum, is ludicrous!!
The answer to your question is already on this post. Replace the defective electrolytics in the secondary of the PSU, (either 4 off 1000uF or 2 off 2200uF), and then fit a new blank 24C64 eeprom. I also assume that you are competent to replace these, if not can I suggest that you call a TV engineer?
Ken,
zorgan:
Thanks for your kind words KROB
I mis-read your post, I thought you were suggesting after a few cycles it will power up.
which is actually correct with the "common fault" of failing capacitors in these models.
The unit will just take longer and longer to power up as the caps degrade. but you already know this by the looks of things.
You are talking more directly in respect to faulty eeproms on the mainboard I noticed.
I have replaced 100`s of PSU boards for the LE40 range because of the caps or replaced the caps which was much more cost effective if i never had a spare board supplied at the time as sometimes we had limited time on site when I was serving as a TV Engineer, but it`s been a while :)
I`ll replace the caps on the PSU and report back how I get on. I will also take into account your advice regarding "failing at a later date if the actual eeprom is not replaced" which sounds interesting and more to the "cause" of the problem.
Take Care.
Zorg.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version