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Page Title:
Table 5-1. Troubleshooting - continued |
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  TM 5-3610-220-14
C4
Table 5-1. Troubleshooting - Continued
Malfunction
Probable Cause
Corrective Action
c. Fuse blown due to ground fault.
c. Disconnect main power plug. Replace
any blown fuses in power supply. Measure
resistance from either side of power line to
chassi. Meter should read open circuit. If
low resistance is read, one of the four
chokes, or the tap transformer, are usually
at fault, and can often be repaired. Consult
factory.
d. Readjust trimpot as follows: ONLY if you
d. Fuse blown due to trimpot on circuit
are SURE someone has changed the
board being improperly adjusted by
trimpot setting, Turn trimpot fully clockwise,
unauthorized personnel.
then back counterclockwise 55.
This should be close enough for normal
operation. (60HZ, LUMAX ONLY.)
e. Fuse blown due to loose fuse clip.
e. A loose fuse clip will overheat fuse,
causing fuse to blow. Check clip for tight fit
on fuse.
6 Outlet dead, but fan in light unit runs
Component failure on circuit board.
Replace circuit board and fuses.
(Spare
when plugged in.
parts kit #A4368.)
7. Image distortion.
a. Copyboard not aligned with focusing
a. Trammel four corners of copyboard with
glass.
focusing glass for correct alignment of
components. Check that focusing glass
frame is firmly contacting at magnetic
latches on both sides of frame.
b. Lens not positioned correctly.
b. Check the lensboard counter readings.
Determine if lens is screwed m the lens
plate.
c.
Copy
not placed on copyboard
c.
Remove copy and remount on
properly.
copyboard, smoothing out wrinkles and
folds.
d. Lensboard or copyboard positioning
d. Recalibrate camera to lens (para 5-5).
counters not calibrated to lens.
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