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Equipment Repairs => LCD TV forum => Topic started by: magikbilly on May 07, 2013,17:04:45

Title: bravia 40s2350
Post by: magikbilly on May 07, 2013,17:04:45

hi

i have a bravia 40s2350 with red led blinking twice-pause then repeat which from research is VD1.8, DE5V/6V Voltage Trouble (DCALERT2).

i bought a power board from enigma spares on ebay but same result. could both boards be bad. any fixed this fault cheers

Title: Re: bravia 40s2350
Post by: t1412 on May 07, 2013,17:27:30

it's possible i'd test the connector on the power board for 5 volts 12v  24v but i don't know what  sort of experience you have. it's best to try and get a service manual this will help you good luck.

regards
shaun

Title: Re: bravia 40s2350
Post by: magikbilly on May 08, 2013,17:05:06

hi

thanks for young r reply i have emailed you the service doc as i could not upload it here

i tested the power supply where the connectors are but i can only test them until the front led flashes
then wait for it to stop flashig then test some more. i mainly see some regulated and un regulated voltages

also some 18v connectors.

where do i test 5, 12 and 24v

thanks

Title: Re: bravia 40s2350
Post by: jordan on May 09, 2013,01:16:49

Or you are convinced, that mark of a machine is correct. That is not possible KDL40S2530 ? ? ?

Title: Re: bravia 40s2350
Post by: t1412 on May 09, 2013,01:31:12

on the psu the connectors are usually marked, make sure your negative probe is connected to chassis ground and red probe for testing, meter should be set on dc volts thanks

shaun

Title: Re: bravia 40s2350
Post by: downunder on May 09, 2013,06:30:38

Code 2 is normally a REG 12V SOS. Assuming your power supply board is OK, the Main Board is the most likely suspect. 12V may also go to the T-Con.

Title: Re: bravia 40s2350
Post by: magikbilly on May 09, 2013,17:20:56

hi

i cannot find any 12v marking on the board, or 5v

where would i test this

thanks

Title: Re: bravia 40s2350
Post by: t1412 on May 10, 2013,02:44:34

can you take a picture of the psu board thanks

shaun

Title: Re: bravia 40s2350
Post by: magikbilly on May 10, 2013,07:41:56

did you get my email with the service manual

Title: Re: bravia 40s2350
Post by: t1412 on May 10, 2013,12:16:03

no i didn't sorry

Title: Re: bravia 40s2350
Post by: cheeky2 on May 11, 2013,07:30:47

Just uploaded the schematic for you on downloads its a wax2t chassis and almost certainly fault on mainboard. Presumably you cannot read the schematic as you would have found the DCALERT2 on page47 and the fault more likely on page 46. I guess you bought the set off ebay recently as i saw an identical unit go with the same fault! If it was i was going to bid but went for too much for me!
good luck in repairing it

Title: Re: bravia 40s2350
Post by: jordan on May 11, 2013,09:25:07

Also check supply 3,3V on IC-3406...is not change IC-3406 (L-5973) on digital FEE board.Service manual page 55

Title: Re: bravia 40s2350
Post by: jordan on May 11, 2013,09:27:26

SM

Title: Re: bravia 40s2350
Post by: magikbilly on May 13, 2013,09:33:46

ic-3406 has 3.38v on pin one