Focus Control - Leica WILD M695 Service Manual

Service manual M695
Doc code 636 718
Action
FOCUS SPEED set min. focus speed
set max. focus speed
FOCUS UP
/footswitch
non-actuated
FOCUS DN
/footswitch
non-actuated
Separate microscope
from the testbox and
check signals
Bridge swingarm with
servicecable and verify see above
signals

Focus control

Select microscope side A or B:
• Select A or B, depending on which side the zoom works incorrect
• Select A if the fault appeares on both sides, A and B.
Reading
1.25 . . . 1.27V
5v +-5%
>4.75V
<0.2V
>4.75V
<0.2V
see above
Reaction
Voltage ok, but
reacts incorrect
Voltages ok
Voltages ok
Voltages not ok
M695 Fault finding
09/93 3077-HWE
Possible fault
Microscope
(Focus servo,
wiring)
Microscope
(short circuit on
Focus servo or
wiring)
Swingarm-
cable
Control unit