IBM 6400 Maintenance Information Manual page 87

Operator Panel
Message
087 PLATEN OPEN
TIMEOUT
CLOSE PLATEN
Table 4. Message List
Explanation
On a coax interface,
the forms thickness
lever has been open
for at least one
minute. Load paper.
Corrective Action
1. Close the forms thickness lever. Press
Stop.
2. Run a print test. If a platen open or close
platen message appears, power off the
printer. Remove the paper guide
assembly or pedestal top cover.
Disconnect connector P107 from the
CMX controller board. Check continuity of
the platen interlock switch cable from
P107 to the switch. Replace the platen
interlock switch assembly if it fails
continuity test. (Refer to Appendix A,
Switch Assembly, Platen Interlock.)
3. Check that the platen interlock switch is
not loose.
4. Check and adjust the platen open belt.
Replace the belt if it is damaged.
5. 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.
6. Disconnect connector P106 from the
CMX controller board. Check the
resistance of connector P106/PLAT M.
(Refer to the Main Wire Harness Test
Tables on page 291.) Replace the platen
open motor if it fails the resistance test.
7. Run a print test. If a platen open or close
platen message appears, replace the
CMX controller board. Record the
message and return it with the defective
board.
Message List
87