I have my Dad's old Celestron Super C8 Plus or more likely it is a Powerstar 8. (Has both manuals but it is DC powered).
The drive is not working (no LED illumination on the hand unit and the drive does not move).
The hand controller is a DD2 (DMD-2?)
It is center pin negative and has been reverse polarity connected to 12V.
I fixed this, but still have no illumination of the power LED and no drive motor movement.
The is a diode in series on the 12V input (presumably for reverse polarity protection) and it tests good, as does the 8V LDO regulator.
Any chance someone has a schematic for the PCB?
Thanks,
Fred