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Equipment Repairs => LCD TV forum => Topic started by: texpis on May 03, 2011,15:59:08

Title: Mirai T321154
Post by: texpis on May 03, 2011,15:59:08

Hi All
I have a Mirai T321154 it turns off after about 5 seconds, I am guessing it’s the power supply? The power supply is a Phihong PSM192-240 Dc output 6.4 to 8MA max. The Capacitors look fine no expanding of the cases (See pics). Does anyone know the pin out of the output so I can try an external supply? Has anyone had similar problems with this supply? Does anyone have a working supply I could purchase?

Thanks in advance  Mick

Title: Re: Mirai T321154
Post by: t1412 on May 03, 2011,17:17:28

ok mick stick a meter across the large filter cap see what your getting should be about 320 volts

shaun

Title: Re: Mirai T321154
Post by: chrissie jones on May 04, 2011,02:30:51

caps look doggie to me.

Title: Re: Mirai T321154
Post by: texpis on May 04, 2011,11:35:08

Hi Shaun
The voltage accross the big cap is 341v. Chrissy which do you think are dodgy or do you mean all of them?

Mick

Title: Re: Mirai T321154
Post by: sparky on May 04, 2011,12:07:26

hi
the caps don't look funny might have lost capacitaince
check with cap meter or have you checked diodes
dave

Title: Re: Mirai T321154
Post by: t1412 on May 04, 2011,16:01:35

the disc caps can give you trouble try changing them or try the hairdryer and can of freeze trick

shaun

Title: Re: Mirai T321154
Post by: texpis on May 04, 2011,16:46:20

Hi Thanks for the replies unfortunaly I dont have a cap meter but I will check the diodes. What is the can of freeze and hardryer trick?

Mick

Title: Re: Mirai T321154
Post by: texpis on May 05, 2011,07:28:16

Hi Guys
I think I have found a damged cap it is a 35v 1800uf . How critical is the cap size I can get a 2200uf 35v at maplins for a couple of quid. to get the exact from RS etc means I have to buy five plus postage. bit of a newby question I know.

Mick

Title: Re: Mirai T321154
Post by: chrissie jones on May 05, 2011,08:19:37

saver to put the right one in sorry.if i had one i would send you one but dont come across that value very offten.

Title: Re: Mirai T321154
Post by: Rquao on May 17, 2011,11:17:46

This is the exact same problem im having with the exact same PSU and tv, iv been trying to find a new PSU board but no where seems to sell them