Author Topic: LG Flatron M1721a-bz aekwlf (Read 7327 times)

billy no mates · « **on:** December 24, 2011,17:18:06 »

hi
ive been asked by a friend to repair this tv/monitor

powers on then shuts down after about a minute

just had it open and three caps on secondry side of psu bulged so obviously knackered
but gonna get these tomorrow from maplins + a couple of others

what im after is a service/training manual for the above model just in case there are any other faults after caps been changed

hope someone can help

cheers
billy :)

Mulja tv repair portal · « **on:** December 24, 2011,17:18:06 »

dougc · « **Reply #1 on:** December 24, 2011,20:13:25 »

Just change caps 80/90% certain to cure. Make sure you use 105 degree ones. Cheers, Doug.

billy no mates · « **Reply #2 on:** December 25, 2011,11:54:37 »

cheers doug :)

Mulja tv repair portal · « **Reply #2 on:** December 25, 2011,11:54:37 »

billy no mates · « **Reply #3 on:** December 31, 2011,18:44:17 »

Hi
doug and everyone else
well ive changed caps still no change powers on for a few seconds then backlight goes off and the bloody thing shuts down

model no:- see above

BLUE BIRD 2(17A) 68709M005L
it has a chassis no of : CL-81 060721 C.S

any help greatly appreciated

thanks
billy

michael first · « **Reply #4 on:** January 02, 2012,04:13:03 »

Hi,a happy N/Y to all,now you should check up the smd MOSFETS on the IP board if everything OK try to override the controller IC's protections.

billy no mates · « **Reply #5 on:** January 02, 2012,11:52:06 »

hi michael thanks for the reply,will check tomorrow having a lazy day today lol...a little hungover i dont suppose you know where i could find a service manual for this chassis at all

regards
billy

Mulja tv repair portal · « **Reply #5 on:** January 02, 2012,11:52:06 »

billy no mates · « **Reply #6 on:** January 05, 2012,12:22:37 »

hi all

mosfets tested ok and i found a service manual but i cant find the protection circuit in the manual i have so im stuck now

any other suggestions

regards billy

Turnip · « **Reply #7 on:** January 06, 2012,12:32:27 »

Hi BNM,

Where's this manual on Quuq ? - Keen Folks will doubtless check your problem and come up with solutions of some sort - Chris

billy no mates · « **Reply #8 on:** January 06, 2012,12:54:47 »

hi sorry chris didnt find it on here but i will upload it now

michael first · « **Reply #9 on:** January 07, 2012,04:19:02 »

Hi Billy,can you tell me what kind of ic is mounted on the inverter board,as the service manual doesn't list it.

billy no mates · « **Reply #10 on:** January 07, 2012,06:23:56 »

hi michael

the inverter board and power supply is all in one
there are three surface mount ics on the back of the board

2x 8 pin ics = nikos p210nvc
and 1x 20 pin ic = OZL68GN

regards
billy

billy no mates · « **Reply #11 on:** January 08, 2012,07:25:53 »

morning all

has anyone had any ideas of a mod i could try as when first switch on it has a slight pink tint so i suspect a ccfl going bad and making the sensing circuit kick in

regards
billy

billy no mates · « **Reply #12 on:** January 08, 2012,11:19:04 »

hi guys

just tried again and noticed when it reverts back to stanbdy i have a slight buzzing noise from speakers and when unpluged from mains i get a popping noise from them also

i dont know if this helps point to anything that may be going or has gone bad on power supply ?

regards
billy

michael first · « **Reply #13 on:** January 09, 2012,06:52:33 »

hi,unfortunately there are not datasheets for OZL68.sorry

billy no mates · « **Reply #14 on:** January 12, 2012,15:04:06 »

hi micheal

thanks for the reply

think im goning to tell him to skip it

regards billy

Mulja tv repair portal · « **Reply #14 on:** January 12, 2012,15:04:06 »

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Author Topic: LG Flatron M1721a-bz aekwlf (Read 7327 times)

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Mulja tv repair portal

Mulja tv repair portal

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