Zoom Control - Leica WILD M695 Service Manual

M695 Fault finding
09/93 3077-HWE
Action
ZOOM SPEED Set min. zoom speed
Set max. zoom speed
ZOOM UP
/footswitch
non-actuated
ZOOM DN
/footswitch
non-actuated
Separate microscope
from the testbox and
check signals
Bridge swingarm with
servicecable and verify
signals
4-8

Zoom control

Heading
1.84 ... 2.34V
5V +-5%
>4.75V
<0.2V
>4.75v
<0.2v
see above
see above
Reaction
Voltages ok, but
reacts incorrect
Voltages ok
Voltages ok
Voltages not ok
Service manual M695
Doc code 636 718
Possible fault
Microscope
(Logic board.
Zoom servo,
wiring)
Microscope
(short circuit on
Zoom servo or
wiring)
Swingarm cable
Control unit