Ask Electronics

4149 readers

2 users here now

For questions about component-level electronic circuits, tools and equipment.

Rules

1: Be nice.

2: Be on-topic (eg: Electronic, not electrical).

3: No commercial stuff, buying, selling or valuations.

4: Be safe.

founded 3 years ago

MODERATORS

DavideAndrea@discuss.tchncs.de

linker3000@discuss.tchncs.de

Reverse engineering the driver board from an ultrasonic cleaner with a short circuit. (discuss.tchncs.de)

submitted 4 months ago by sima214@discuss.tchncs.de to c/askelectronics@discuss.tchncs.de

4 comments fedilink hide all child comments

I got a used ultrasonic cleaner with liquid damage for almost nothing and I am trying to repair it. So far I've confirmed that the board has a short circuit between live and neutral somewhere after the relay. Also, while reverse engineering it, I noticed something that seems weird. When the relay closes, it adds C3 in parallel to C2, both feeding the logic circuitry.

back

front

you are viewing a single comment's thread
view the rest of the comments

[–] Voodoo3dfx@lemmynsfw.com 0 points 4 months ago

Have you tried unsoldering the tiny bridge rectifier DB1 and meter the four diodes within it?