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Component identification

daffyduxxx

New Member
Hi everyone,
I am trying to repair a musical, singing, dancing 3 foot tall Moose, a Christmas decoration.
The owner plugged in the wrong power supply.
I have found a blown capacitor and this SMD transistor tests as faulty too.
But I'm having great difficulty identifying it, or what it is actually doing in the circuit.
As I say, the figure sings, plays music and moves.
I have attached photos of the whole pcb and closeup of the transistor. Any help would be very much
Paul
Screenshot_20221123-213418_Gallery.jpg
Screenshot_20221123-213406_Gallery.jpg
Screenshot_20221123-213401_Gallery.jpg
 
Last edited:

Pommie

Well-Known Member
Most Helpful Member
When you say wrong power supply, was it wrong voltage, polarity or both?

Mike.
My biggest worry would be that black blob. Google COB if needed.
 

daffyduxxx

New Member
Mike,
The owner didn't enlighten me on that. Just said the wrong power supply.
Do you think the chip could be "fried" as well?
Paul
 

Nigel Goodwin

Super Moderator
Most Helpful Member
Mike,
The owner didn't enlighten me on that. Just said the wrong power supply.
Do you think the chip could be "fried" as well?
Paul
Quite possibly, the COB is likely to be a fairly 'sensitive' device, and easily damaged. Basically it depends if other parts died before the COB could be damaged, and thus saved it.

Drawing the schematic out, and labelling what each external wire is, would give a clue as to what the burnt out device is.
 

DerrickOlley

New Member
Had a similar problem! I drew a diagram and it became more and more clear to me! It's not working yet, but I'm thinking about solving the problem!
 

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