Sir jezzyjet . . . . .
My GAWD . . . .certainly you must have had the utter stupidity of starting to disassemble the unit in a power up condition ?
I see several foil traces vaporized and seems like I see a touched/arc mark left on the A2 connected heat sink tab of the TRIAC / (electronic switch) on the top of the PCB.
That unit is being :
http://www.farnell.com/datasheets/8...8.1076227279.1559346572-1307427087.1559346572
The touch spot /arc point is the
VIOLET circle on the magged up
ORANGE outlined inset photo. supposedly your boards metal shield touched to that point ?
WHAT I AM A SEEIN' . . . . .
On the same inset we see that the R12 gate . .wun hunna ohm . . . . drive resistor from the systems 28 pin u/p controller, probably using Q2 for driver interfacing, was not vaporized, so you might have squeaked out on that aspect, of any power backflow collateral damage.
Just to the right side of the of the TRIACS Anode 1 terminal are two side by side heav-ee dood-ie push on wire connector terminals associated with what the TRIAC is switching power to.
They are being
GREEN rectangled over on the foil side of the board.
Continuing on the larger foil side photo . . . the
RED triangle is being the TRIAC connection points.
Then, I can see bubbled up/vaporized foil in the
HEAVY YELLOW lined up areas.
At the far right there is placed an
ORANGE mark up rectangle for a 9 pin Molex ? connector that has its pin 4/6 ? in
FUCSIA that is going up to the top of the board and a large repair strip . . .
FUCSIA mark up also . . . has been reworked across the top on that foil buss. Possibly, this having been done in the past ?
BATTER UP ! . . . .
Now . . . .time for you to inspect and ohm out measurents to see if the still INTACT end of the
RED circle end of the
YELLOW foil path is measuring ~zero ohms to A2 connection and then, also to A1 ? (To see if the TRIAC was / is zapped A1 to A2.
( If you are
VEWY-VEWY-VEWY lucky . . . . the TRIAC may still be good because your errant touching position may have only put full AC line potentail
ACROSS a circuitous foil pathway, and not having passed
THRU any components .
LASTLY . . . . . . . that boards foil side looks like . . . . .
SCHEISS . . . . . ( icht bin der vurds uf Herr Kapp )
I specifically refer to the extensively encircled
GRAY areas.
The site info is not telling me your country of origin . . . . so I don't know if you are 120VAC or 220VAC powered.
Nor do I know your town / locale . . . . . but the board looks of frequent high humidity and possible airborne contaminant depositions in those areas . Onset of black mold ? black lung country ?
Pull the board completely free and do a multiple 409 cleaning with a brush and thorough cleansing rinses 2 times then double lash a strong cord thru the corner hole, marked with the
PINK circle, and then grab the cords end and strongly twirl the board around your head to then sling off most
all of the water. Then finish a full dry with the heat of a hair drier.
THEN you will
EASILY and
FULLY be able to evaluate the boards foil damaged areas.
Now, tell me what other info you need . . . . .
REPAIR ILLUSTRATION REFERENCING . . . . .
73's de Edd . . . . .
Why you should NEVER-NEVER- NEVER-EVER stand behind a fat lady when taking your group photo:
https://i.pinimg.com/736x/a8/3d/e2/a83de2adf5b432c5b85a16afd4e8fe4c--so-funny-funny-shit.jpg