Mulja tv repair portal

Equipment Repairs => PLASMA TV forum => Topic started by: leonard085 on February 26, 2015,16:56:20

Title: PS51D550 DEAD PSU TYPE BN44-0444B
Post by: leonard085 on February 26, 2015,16:56:20

This plasma tv is dead with no voltages from the power supply.Ac is not getting to the bridge rectifier, the AC voltage goes thru a relay which is not switching on
The psu is type bn44-0444b, a schematic would be helpful if available

Title: Re: PS51D550 DEAD PSU TYPE BN44-0444B
Post by: watteau on February 27, 2015,03:44:43

Hi,
I don't know if you have the 5v Standby supply, but I've had problems
with the blue, 47nfd caps on this power-supply going o/c - similar type
of capacitors used in older Vestel power supplies, (15nfd) that gave trouble.
Regards.

Title: Re: PS51D550 DEAD PSU TYPE BN44-0444B
Post by: downunder on February 27, 2015,04:31:44

Hi Leonard,

I suspect there's a digit missing from your PSU number. With an amended number, I may be able to help.

Bruce

Title: Re: PS51D550 DEAD PSU TYPE BN44-0444B
Post by: jordan on February 27, 2015,10:00:47

BN4400444b
http://www.ohmsupplies.co.uk/REPAIR-KIT-BN44-00444B-REV12-PS51D550C1-QS801/QS802-FAULTY

Title: Re: PS51D550 DEAD PSU TYPE BN44-0444B
Post by: leonard085 on February 27, 2015,16:39:45

bn44-00444b is the correct psu type,
The kit from Andy in Ohms supplies wont help me in this instance,
I can short out the contacts on the relays and the Vs voltages are ok
Normally I would short ps-on to chassis, this would take the psu out of st/by