Sabre Θ∆ Mar 23

Poking around on a #repair of a very inexpensive Canon EOS 5 QD (film, equivalent to the Canon A2)

It runs very hot and drained a new battery in minutes; the flash capacitors test at a normal capacitance for the listed values, but this board (Canon part 1550 - DC/DC assembly) smells funky. Anyone know what the component 254 Yd- is? Position label on the board is PG.

The flash caps test normal, and we have spares for those anyway. The battery has shown at a normal level on other cameras which take the same type (Pentax SF7) so whatever is faulty on this board is causing the battery to discharge hard, with gradual recovery afterward.

If anyone knows anything which might help, please let me know <3

#camerarepair #filmPhotography #35mm #CanonCamera #camera

Show threadbambinod
@sabremc it's using a boost circuit to charge the caps. Probably some surface mount parts on the other side of the board. Smell is from a crispy diode, transistor, or mosfet, probably will be visibly damaged from overheating.
Mar 23 at 3:56amWeb
Show threadSabre Θ∆ Mar 28
@bambinod Fun times, so about what a partner here said was likely the issue, hopefully the damaged component will be visibly damaged but still identifiable then :3 thank you ^^