IBM 6400 series Maintenance Manual page 92

088 CONTROLLER 23.5V
1. Controller Voltage Failure.
Cycle Power. Run the print job again. If the message appears, download
the emulation software again.
2. Cycle power. Run the print job again.
If the message appears, replace the flash memory.
3. Power on the printer. Run the print job again.
If the message appears, replace the CMX controller board. Record the
message and return it with defective CMX board.
4. Power on the printer. Run the print job again.
If the message appears, replace the power supply board.
5. Power on the printer.
If the message appears, replace the shuttle frame assembly.
089 RIBBON STALL
1. This message occurs when the ribbon fails to move while printing. Check the
forms thickness lever: if it is set too tightly it can inhibit ribbon movement.
Set the forms thickness lever to match the thickness of the paper being
used, but not too tightly.
2. Inspect the ribbon guides for ink buildup, which can inhibit ribbon movement.
Clean the printer.
3. Inspect the hammer bank cover/ribbon mask for bending or damage, which can
inhibit ribbon movement.
Replace the hammer bank cover assembly if it is bent or damaged.
4. Check the platen gap. If the gap is too small, it can inhibit ribbon movement.
Adjust the platen gap.
5. Power off the printer. Remove the paper guide assembly or pedestal top cover.
Check the resistance of connectors P106/LRIB M and P107/RRIB M. (Refer to
the Main Wire Test Tables, page 297.)
If ribbon motor resistance is not correct, replace the motor and/or the
intermediate cable, if installed.
92 Troubleshooting