My Experience - Motor Drive and M.15 Ni-Cd Control Pack
I have been using OM winder 2 for many years, recently I have bought
a second hand motor drive 1. It was very cheap, cost only HKD1200 for motor drive 1 plus
Ni-Cd Control Pack 1 and Charger, with box and manual too. As with most batteries
(both normal and re-chargeable), the very old Ni-Cd batteries inside the Ni-Cd Control
Pack was not usable. A 3hrs charge failed to finish one roll of film.
I opened the
Control Pack 1 and found some liquid was leaked from the battery pack. I
cleaned the circuit board and bottom case with alcohol and replaced the
with 1 5/7 pieces of Varta 9V 120mAH Ni-MH batteries (total 12 cells), it
now works fine. Another un-expected result was I get a Ni-Cd Control Pack
of 50g lighter than before! The original battery pack was heaver and
might have a capacity of around 150mAH, the Varta is much lighter and 120mAH
are not far away. The motor drive give me a feeling of fast and smooth, which
I cannot obtain from the Winder 2.
The rated charging current of the Charger 1 is 36mA. To re-charge
the Control Pack 1, you must be more careful as the
Ni-MH batteries are more sensitive to overcharge. Overchage the battery
might shorten the battery life, but a charging time of below 5 hrs should be safe
for a depleted battery.
Besides the Varta Ni-MH battery, you may also use other 9V re-chargeable
battery. Such as Panasonic, it is a Ni-Cd battery with the same 120mAH rated
capacity, but I have dissassembled one and found the cells inside are marked
It is better to discharge the batteries (with a resistor, don't short
circuit them) before installation, the batteries should be wrap with a plastic
sheet to prevent short circuit to casing, the 35mm negative pages serve this
function very well. A thin sponge at the bottom of casing
is very helpful for fixing the batteries in place.
If you are not an electronics
technician or you have no experience in repair electrical device, it is better
leave this job to a qualified person. For further information on
how to change the batteries in M15V Ni-Cd Control Pack you can visit
The Camera Repair Resource Guide.