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SAMSUNG LE32S73BDX/XEU Flashing RED LED
jimca007:
your lucky I happened to have the service manual lying from earlier something else you might want to try.
Taken from manual:
It is possible to over ride the lamp error detection circuit and force the set to power up. To enable this feature proceed as follows:
connect ( short ) pins 2 and 4 of the main board connector CN 1101.
It's very possible you could have a lamp error issue this will allow you to get the set operational and see whats going on good luck !
markie76:
--- Quote from: jimca007 on September 03, 2011,18:39:43 ---your lucky I happened to have the service manual lying from earlier something else you might want to try.
Taken from manual:
It is possible to over ride the lamp error detection circuit and force the set to power up. To enable this feature proceed as follows:
connect ( short ) pins 2 and 4 of the main board connector CN 1101.
It's very possible you could have a lamp error issue this will allow you to get the set operational and see whats going on good luck !
--- End quote ---
This sounds promising except there isn't a connector CN1101 on the main board :(
markie76:
--- Quote from: jimca007 on September 03, 2011,18:29:03 ---Taken from a thread by " Contrast John " so thanks to him :
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.
--- End quote ---
There is no 'IC1803' on the underside of the mainboard - the only 8-pin IC on the underside of the main board is 24C32WP - IC3004
jimca007:
That'll be it most chips that start 24c are eeproms. For the lamp out bypass on the model I was looking at was the socket on the main board that connects to the power supply and your right it wasnt cn1101 it was cn 1001 but it still worked !
Attached is the data sheet for th eeprom with pin outs
markie76:
Yes there is a CN1001 connector going from PSU to main pcb.
With regards to the eeprom reset - if I reset it (wipe it) do I have or how do I re-save the data that is supposed to be in there?
Earlier I had another look at it. Tested the 3 fuses on the inverter and they all seem fine as do the other components with a visual inspection.
I powered it up and upon listening to the PSU closely - ie ear about 5cm away from it, you can hear a feint click (on the 2 second red LED pause) then for the 4 flashes there is a feint fuzzy buzzing noise.
So I think I will hold off reseting the eeprom for now.
Is the protection overide (pins 2 & 4) worth doing? Is there any risk?
I'm going to test each of the psu caps.
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