Repair of an HP82004A Power Reserve Pack

[albertofenini]

Hello everyone, we fixed it !
Thanks to everyone’s contributions !
We used a BC548 as a replacement, hfe was over 200
We wired the pieces differently and isolating the transistor legs just to be sure
Now the led only turns on when a battery is inserted
Voltage provided is 15,3 volts and current draining is about 50 mA
Although differently everything fitted in the narrow space available around the power connector
Thank everyone !!!

Pictures updated here : Repair of an HP82004A (updated April 13th 2020)