Table 5-1. Troubleshooting-Continued
Malfunction
Probable Cause
Corrective Action
e. Vacuum turbo-compressor
e. Replace defective parts of vacuum turbo-
defective.
compressor assembly para 6-2) or vacuum
turbo-compressor motor (para 6-6).
Replace entire unit if necessary.
3. Arc lamp flickers
a. Gap between carbons too great
a. Adjust carbons (para 4-27. d.).
to provide consistent lighting.
b. Drafty conditions around operating
b. Eliminate all drafts around working area
location.
of cameras.
c. Carbons of different lengths in
c. Substitute carbons of same length or
holders.
replace with new carbons (para 4-27. a. ).
d. Contacts in magnetic contactor
d. Smooth badly pitted or burned
not making proper contact.
contacts with a fine file (para 6-36). Replace
defective parts (para 6-36) if necessary.
e. Defective sensing device.
e. If one lamp does not flicker, switch the
cables from the operating lamp sensing
device to suspected sensing device. If the
lamp which did not flicker now does, replace
the defective sensing device. ( ara 6-37 )
4. Image distortion
a.
Copyboard not aligned with
a. Trammel four corners of copyboard with
focusing 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 in
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
d. Recalibrate camera to lens (para 5-5).
positioning counters not calibrated to
lens.
e. Distance of lensboard not related
e. Recheck the focusing Chart for correct
to same reduction ratio.
lensboard and copyboard distance.
f. Thick copy.
f. If copy has appreciable thickness, its
thickness must be added to the copyboard
counter readings in units of 1/100 inch.
5. Vibration or excessive noise
a. Impeller plates in vacuum turbo
a. Remove the vacuum turbo-
during operation
compressor not positioned properly.
compressor assembly (para 6-2.a. ),
disassemble (para 6-2. a. ), and reset the
impeller plates.
b.
Dry oil felt wipers causing
b.
Apply
oil to wipers.
Let the oil
lensboard or copyboard to vibrate
penetrate thoroughly before resuming
while under power.
operation.
c. Compressor fan in turbo-
c. Align compressor fan on motor shaft
compressor motor rubbing against
(para 6-8. a.)
rear end frame.
d. Dry or burned-out bearings in
d. Replace defective bearings with new
turbo- compressor motors or drive
ones (para 6-8. a. and 6-12. a. ).
motors.
e. Loose mounting hardware.
e. Locate loose hardware and tighten.
f. Gear meshing.
f. Vibration or noise will result if drive gears
are not fully meshed. If gears are dry, apply
sufficient grease, or if foreign matter is
impacted between the teeth, clean
thoroughly, or if a tooth is damaged, dress
off or replace gear (para 6-32. a.)
5-2
