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M695 Fault finding
Service manual M695
09/93 3077-HWE
Doc code 636 718
Check lines of Powerground PGND
(Voltage drop on PGND relating to logic ground)
Signal
Action
Reading
Reaction
Possible fault
FOCUS UP
Adjust lamp to maximal
max. -0.8W
If voltage is ok - depending on the incorrect
brightness
with standard- function, check signals of:
swingarm
Lamp control - page 4-7
cable
Zoom control - page 4-8
Focus control - page 4-9
Bridge swingarm with
max. -0.8V Voltage ok
Swingarm cable
service cable and adjust
(One of the two
lamp to max. brightness
PGND-lines is
broken)
Voltage not ok
typ. >-1v
One of the two
PGND-lines in
the microscope
or control unit is
broken.
Important: Adjust lamp again to minimal brightness!
4-6