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skua
skua
@skua@mastodon.social  ·  activity timestamp 4 days ago

Any simple suggestions on replacing C1 in this circuit?

What value capacitor(?) it is? Or likely to be?

C1 selected as possible fault on basis of possible magic smoke residues.

Board is from an artificial Christmas tree with optic fibre tipps in the foliage.

The green LEDs will now only flash for <0.5 seconds very very infrequently.

I have a multimeter and a soldering iron.

Suggestions for hashtags?

#Electronics #Repair #ElectronicsRepair

3 media
Label of the power supply /  wall wart.
PRI : 240V - 50Hz
SEC:12V - 300mA Max3.6VA
Label of the power supply / wall wart. PRI : 240V - 50Hz SEC:12V - 300mA Max3.6VA
Label of the power supply / wall wart. PRI : 240V - 50Hz SEC:12V - 300mA Max3.6VA
Bottom of the simple circuit board.
Middle of left side has a surface mount component labelled C1. It seems to be the centre of a small discoloured area on the circuit board.
Bottom of the simple circuit board. Middle of left side has a surface mount component labelled C1. It seems to be the centre of a small discoloured area on the circuit board.
Bottom of the simple circuit board. Middle of left side has a surface mount component labelled C1. It seems to be the centre of a small discoloured area on the circuit board.
Top if the circuit board showing 16 LEDs and an electrolytic capacitor.
Top if the circuit board showing 16 LEDs and an electrolytic capacitor.
Top if the circuit board showing 16 LEDs and an electrolytic capacitor.
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Rue Mohr
Rue Mohr
@RueNahcMohr@infosec.exchange  ·  activity timestamp 4 days ago

@skua OMG what? what? no, OMG, that thing is not safe!!!
where is the fuse!? those pads are too close! eeeeeek! tell me I'm not seeing what I think I am! is that just a low voltage cap/pcb? pls tell me thats 12V and you just need a new generic 12V adapter...

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Bastelwombat
Bastelwombat
@bastelwombat@chaos.social  ·  activity timestamp 4 days ago

@RueNahcMohr @skua And no transformer or anything that could provide galvanic insulation.

But it says Pri: 240V Sec: 12V 😨

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Bastelwombat
Bastelwombat
@bastelwombat@chaos.social  ·  activity timestamp 4 days ago

@RueNahcMohr @skua Maybe the PCB has a 12V-AC in, and there‘s a real transformer outside of the pictures.

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