8-2
94MS20 Rev. B4
Shutter Rotation Fault Tree
No
Shutter Rotation Fault Tree
Does the shutter
rotate at any time?
Is the lamp lit?
The shutter will
not open for an
exposure without
the lamp being lit.
Go to the No Strike
Fault Tree.
Is LED #3 lit on PC
Board?
Does the shutter seem to
bind during rotation?
Check the set
screw on the shutter
motor gear and the
shutter position
switch.
Is the chain too tight
or bearings worn?
Yes
Yes
No
Yes
Adjust shutter
motor and/or
replace bearings
and air tubes.
Yes
Possible
faulty
shutter
motor.
No
No
Check for 120 VAC on
terminal 4 white and
terminal 6 red on the
terminal strip when
shutter should be
rotating.
Yes
If LED #3 is lit, check
for 120 VAC at pins
2 and 4 at power
connector on
PC board.
No
No
Repair or
replace wiring
from PC Board
to terminal
strip.
Replace
PC board
Yes
No
Check for 120 VAC
at shutter motor.
Yes
Replace
shutter
motor.
Yes
Repair or
replace wiring
from terminal
strip to shutter
motor.
No
No Shutter Rotation
Yes
LED #3
Power Supply PCB-Rear View
Summary of Contents for OLITE
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