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Samsung LE40R87BD LCD TV - relay clicking repeatedly but wont start
chrissie jones:
i can see that there are a few bulged caps. CM811,CM817,CM812.change them first.if still the same change them all.
conhari:
--- Quote from: Contrast John on April 25, 2009,14:16:08 ---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.
Thanks so much for this info. Followed it and it worked first time! Just to clarify, eprom pins are numbered from small arrow on circuit board, 1-4 on left and 5-8 going up the other side in that order. I hope the picture attached helps
--- End quote ---
GRAHAM RICHARDS:
Hi,I work in a workshop that repairs these samsungs all week long.When they come in with defective electrolytics
in the psu(some have 3 others have 4 all 1000m/16vw).After replaceing the defective electrolytics we also in 9 out of 10 cases have to replace the eeprom on the main board.They are not preprogramed,but blanks! I think they are 24lc128 0r 24lc256.You can even fit a 24lc512 ie, they can be larger but not smaller in memory size! By fitting the epprom,it forces the flash memory to rewrite the eeprom & so you wont have to go in the service menu in most cases!The corruption is caused by noise on the supply line when the electrolytics fail!Hope this clears a few things up. Graham Richards
steve_01:
--- Quote from: GRAHAM RICHARDS on December 03, 2011,19:36:59 ---we also in 9 out of 10 cases have to replace the eeprom on the main board.They are not preprogramed,but blanks! I think they are 24lc128 0r 24lc256.You can even fit a 24lc512 ie, they can be larger but not smaller in memory size!
--- End quote ---
Are you sure about this info, someone said a 24LC64 is enough memorysize to fit in this mainboard!?
As i only have 64 at stock, this is important for me to know.
Also, have mailed samsung portal to be reactivated to get schematic of the mainbord.
But really thought someone here could help me on that one, is the pcb-wire and a via that
is damaged by another repair shop, and i need to have the schematic to see where the via is going. Its pin 6 of the eeprom ic803 that has a damaged via between pin and a smd resistor.
Turnip:
Hi Steve,
Its's an old one but give Quuq folks a piccy of your prob - Chris
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