Author Topic: PS51D550 DEAD PSU TYPE BN44-0444B (Read 11712 times)

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

Mulja tv repair portal · « **on:** February 26, 2015,16:56:20 »

watteau · « **Reply #1 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.

downunder · « **Reply #2 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

Mulja tv repair portal · « **Reply #2 on:** February 27, 2015,04:31:44 »

jordan · « **Reply #3 on:** February 27, 2015,10:00:47 »

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

leonard085 · « **Reply #4 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

Mulja tv repair portal · « **Reply #4 on:** February 27, 2015,16:39:45 »

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