As part of all that usual 'EU Recycling WEEE Directive' I have a new job! Its sort of a charity thing, all proceeds are used for school education programs on recycling. We sell off sets pretty cheap, around £50 max for a 42"
There has been a shop that sells all sorts for some time, but recently, they have gone into electricals--Guess who gets to play with all those!
Repaired quite a few, but this Samsung set is causing me issues.--And being a big plasma--Everyone wants the thing!
QX801 had a hole in it and was replaced along with its partner, QX802. Before replacement, the set 'clicked' every couple of seconds, and still does after replacement of these mosfets.
A couple of iffy looking caps have been changed, and still no go.
The 5V line is present, and so is the 350 odd from the power-factor circuit on the fuse in the centre of the PSU, but the two 'main' psu parts that supply Vs, Va, 5.3V etc are not running...
The supply from PFC falls to around 280 at 'click' then climbs back to 350.
There is a supply present to the small sub-panels--one of which drives QX801/2, of 112V for about a second or so, but this decays soon after the click.
I have no schematic either--none around it seems.
Any ideas on this oddball?
There has been a shop that sells all sorts for some time, but recently, they have gone into electricals--Guess who gets to play with all those!
Repaired quite a few, but this Samsung set is causing me issues.--And being a big plasma--Everyone wants the thing!
QX801 had a hole in it and was replaced along with its partner, QX802. Before replacement, the set 'clicked' every couple of seconds, and still does after replacement of these mosfets.
A couple of iffy looking caps have been changed, and still no go.
The 5V line is present, and so is the 350 odd from the power-factor circuit on the fuse in the centre of the PSU, but the two 'main' psu parts that supply Vs, Va, 5.3V etc are not running...
The supply from PFC falls to around 280 at 'click' then climbs back to 350.
There is a supply present to the small sub-panels--one of which drives QX801/2, of 112V for about a second or so, but this decays soon after the click.
I have no schematic either--none around it seems.
Any ideas on this oddball?
Comment