IBM 6400 Series, Maintenance Information Manual

Page: 63 / 422

Message List
63
002 FORMS JAMMED
CLEAR JAM AND
RELOAD FORMS Attention message:
the printer cannot
detect paper motion.
Inspect the paper
path for jams. 1. Clear jams. Load paper.
2. Press Form Feed several times and
check that forms feed without erratic
motion, noise, or pin-hole damage. If
forms do not feed, go to Paper feeds
poorly, page 125.
If forms feed, go to the next step.
3. Press View once and check that forms
move up. Make sure the forms thickness
lever is not set too tightly.
4. Press View again and check that the
forms thickness lever rotates and the
paper moves down. If the forms thickness
lever does not rotate and/or the paper
does not move down, refer to Reverse
paper feed: platen does not open, page
126.
5. Check the paper tension between the
tractors. Adjust the right tractor so that it
does not pull paper too tightly or leave it
too loose. The right tractor should hold
the paper under “slight” tension.
6. Inspect the ribbon mask for bends or
deformation that block the paper path or
prevent paper from exiting the pedestal
top cover. Replace a damaged hammer
bank cover assembly.
7. Check and adjust the platen open belt.
Replace the belt if it is damaged.
8.
Check the platen open pulley and the
platen pulley for looseness. Bottom out
the platen open motor pulley on the motor
shaft and torque the 1/16 inch set screw
to 9
± 2 inch-pounds (1.02 ± 0.23 N•m).
Tighten the 7/64 inch setscrew in the
platen shaft pulley, then open and close
the forms thickness lever and check that
the platen pulley setscrew does not hit
the left ribbon guide.
9. Inspect the tractors and tractor door
springs for damage or excessive wear. If
either tractor is worn or damaged, replace
both tractor assemblies.
10. Check and adjust the paper feed belt.
Replace the belt if it is damaged.
Table 4. Message List
Operator Panel
Message
Explanation Corrective Action