HP9810A Printer

[aj04062]

I took off the main gear that drives the printer mechanism to test if the motor had any torque. It didn't even turn the idle gear. There must be something up with the motor.

I tried another printer unit I have and this one seems to advance fine so there isn't an issue with the main calculator's circuits. I have not ruled out the PCBs on the printer mechanism.

Anyone have similar issues with the motors on these?