Repair of an HP82004A Power Reserve Pack

[teenix]

(04-08-2020 10:38 PM)albertofenini Wrote:  Thanks Dave
What do you think of the use of a BC548 as a replacement?
Thanks and take care !!

The BC548 has a bit more gain, but should work.

The pinout for the mps3646 is [e b c] looking down from top, flat to bottom.
The BC548 is [c b e].

If the LED works as expected, hook the battery up afterwards and measure the current into the battery.

cheers

Tony