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Equipment Repairs => LCD TV forum => Topic started by: pan on July 10, 2011,17:10:40

Title: Daewoo DLT-37C3FT3 Dead set stuck in standby.
Post by: pan on July 10, 2011,17:10:40

Hi,
This set is stuck in standby.
Using the R/C to turn the set on only makes the LED flash green but no sound or picture.
The 5v is fine, but 12v & 24v missing.
Any help much appreciated.
Pan   

Title: Re: Daewoo DLT-37C3FT3 Dead set stuck in standby.
Post by: jimca007 on July 11, 2011,07:45:10

Don't recognise the set off hand but if you can get a part number for the psu or upload a pic it'd help to give you  some pointers.
On a general note the majority of stuck in standby faults are caused by faulty secondary output capacitors, check them over for swelling or leaking anything that doesnt look perfectly flat on top change.
Hopefully you'll be lucky !

Title: Re: Daewoo DLT-37C3FT3 Dead set stuck in standby.
Post by: pan on July 11, 2011,16:05:15

Hi,
I’ve checked the electrolytic caps (ESR) on the p/s pcb they all check out fine.
Has anyone got the p/s (FEL-3732UL) schematics?
Thanks
Pan

Title: Re: Daewoo DLT-37C3FT3 Dead set stuck in standby.
Post by: pan on July 11, 2011,16:10:17

Hi,

My mistake the P/S is a FEL-3237UA.

Cheers.

Pan

Title: Re: Daewoo DLT-37C3FT3 Dead set stuck in standby.
Post by: chrissie jones on July 12, 2011,02:53:55

had the same set with the same problem before.it was the epprom corrupt.

Title: Re: Daewoo DLT-37C3FT3 Dead set stuck in standby.
Post by: jimca007 on July 12, 2011,05:52:41

There's a repair kit for this lists

The repair kit contains the following components:
• C30
• C31
• C34
• C35
• C36
• C37
These kits are usually not far off the money try changin the caps see how you go won't take long and might save you a few quid on a psu if thats where the fault is although i defer to chrissie at 130 yrs he's far more knowledgeable than I !

Title: Re: Daewoo DLT-37C3FT3 Dead set stuck in standby.
Post by: jimca007 on July 12, 2011,06:04:53

just to check this the one?

Title: Re: Daewoo DLT-37C3FT3 Dead set stuck in standby.
Post by: chrissie jones on July 12, 2011,06:14:03

yes. thats the same power board.

Title: Re: Daewoo DLT-37C3FT3 Dead set stuck in standby.
Post by: pan on July 12, 2011,12:36:54

Hi,

Yes thats the PCB in the photo.

Ok I will try the epprom, as the caps check out fine.

Thanks for your time.

Pan

Title: Re: Daewoo DLT-37C3FT3 Dead set stuck in standby.
Post by: daz on October 29, 2011,06:54:44

hi chrissie
dont supose you (or anyone else) has an eeprom or an eepron dump for a dlt-32c3ftb.
thanks
daz

Title: Re: Daewoo DLT-37C3FT3 Dead set stuck in standby.
Post by: chrissie jones on October 29, 2011,07:15:32

ill take a look for you and get bacfk to you...

Title: Re: Daewoo DLT-37C3FT3 Dead set stuck in standby.
Post by: KROB on October 31, 2011,06:26:34

We repaired these for Daewoo when in warranty. There was a mod made to the PSU. When C30 was 220uF/10v it was to be changed to 1000uF/16v, you could try that first.
It was also common for the eeprom to fail and you could try a blank 24C64 in that position too. (U11?)
You can test this PSU by shorting out the relay contacts and checking that all PSU output voltages are corect. If they are ok then suspect the eeprom. It is also worth trying to "reset" the eeprom by temporarily shorting pins 5 and 6 (serial and data) for a few seconds at switch on.
Try switching on with the inverter disconnected too.
Ken

Title: Re: Daewoo DLT-37C3FT3 Dead set stuck in standby.
Post by: daz on November 01, 2011,04:57:26

Hi ken,
Thanks for the reply, these eeproms have to be pre programmed, got set working using a dump from a vestel chassis  :08: still would be nice to have a copy of the correct one.
Daz