RCA L22HD31 power supply issues

cbentrott

New Member

Join Date: Nov 2012

Posts: 7

Country: Canada
#1

RCA L22HD31 power supply issues

11-09-2012, 02:33 AM

"posted this in the power supply forum but didn't know there was a tv forum sorry for repost"

First off i would like to say hi as i'm new to the badcaps forum, 2 day's ago I received a 32 inch RCA HDTV from my friend and the power light blinks like crazy and won't start i was able to run the t-con board just fine using a seperate 5 and 12 volt power source, everything start's minus the CCFL tube's X4 that light the screen because the inverter is on the same board as the power supply. there are no bloated caps to be seen but i hear a clicking noise from the area of the board circled in red i think it may be a bad transformer any thought's ?

sorry for my grammer i haven't slept awake since yesterday trying to figure this out

TV model: RCA L22HD31

supply/inverter model: jsi-220406

http://www.shopjimmy.com/rca-jsi-220...t-inverter.htm
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budm

Badcaps Legend

Join Date: Feb 2010

Posts: 40746

Country: USA
#2

11-09-2012, 10:15 AM

Re: RCA L22HD31 power supply issues

Heat up the board with hair dryer first to see if it will come on. It can be as simple as small start up caps (22~47uf 50V) in the primary side section.

Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956

Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999

Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl

Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/

TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809
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cbentrott

New Member

Join Date: Nov 2012

Posts: 7

Country: Canada
#3

11-09-2012, 04:25 PM

Re: RCA L22HD31 power supply issues

do you mean the small caps near the transformer?
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budm

Badcaps Legend

Join Date: Feb 2010

Posts: 40746

Country: USA
#4

11-09-2012, 04:39 PM

Re: RCA L22HD31 power supply issues

Yes, one is close to the left heatsink where the MOSFET is mounted, another one is close to the black opto-isolator.

Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956

Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999

Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl

Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/

TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809
Comment

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RCA L22HD31 power supply issues

RCA L22HD31 power supply issues

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