HP97 battery pack rebuild

[Paul Berger (Canada)]

If the motor is running all the time and the gear is damaged, as in missing teeth it may be just trying to return to the right margin, if the print head is away from the right side, manually moving it to the right side may stop the motor. Other possible failures are the right margin sensor, transistors driving motor or the PIK chip. There is a service guide for the 97 available, with good schematics, on the MoHPC documentation memory stick.

Paul.

(02-18-2016 01:49 PM)Jlouis Wrote:  Battery rebuilt succesfully.

Thanks to all for the good advises and informations.

I will post currents and time for complete charge afterwards in the respective thread.

Calculator is functining ok, altough printer motor is on all the time. As I said previously, card reader and printer are dead. I'll try to fix it, but I see the gummy wheel and a gear for the printer damaged (eroded, if it is the right word in english). I searched for parts on TAS and found only the o'rings for the card reader. I guess it will be a tough job, let's see.

Cheers,

JL