Electronics > Repair
Fridge Freezer Board Repair - Transistor
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Wobbly0199:
You are right. i tried the 1.5v version and it worked fine. it didn't solve the original fault of intermittency doh!
ozcar:
In what way is the operation "intermittent"?

How did you know that component had "burnt out slightly"?

With some insight from a view of the other side of the PCB from the second photo at http://ridzip.ru/shop.php/2/1/0/1020?n_str=0&k_str=1, maybe that triac is used to turn the lamp on, but in that case failure there would not obviously cause the whole fridge to stop working.

Given it is only a single-sided board, it should not be too difficult to trace out the circuit.
floobydust:
The controller IC might be toast, the burn marks on the PCB at little triac, or if there was a ground-fault.
Providing the make/model of the fridge would help others.
The big triac BT137 I think drives the compressor contactor, the little one the lamp.
The capacitors do fail on these boards as well.
themadhippy:
if its intermittent id start by looking for a dodgy solder joint or wire connection.
floobydust:
Intermittent operation of fridge control boards can be the dropper cap aging, as well as the 470uF going bad.
"Eating from tins and packets" I'm not sure what that means, tinfoil everywhere, beer being splashed on the board?  :popcorn:
Isn't the board covered or something?
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