Instruction manual

86
Chapter 3 Troubleshooting Procedures
UNDEF INTERRUPT* Message
1. Undefined Interrupt. Firmware error on the CMX controller board.
Cycle power. Run the print job again. If the message appears,
download the emulation software again (page 130).
2. Cycle power. Run the print job again.
If the message appears, replace the CMX controller board. Record
the message and return it with defective CMX board.
UNDFNED OPCODE* Message
1. Undefined Opcode. Firmware error on the CMX controller board.
Cycle power. Run the print job again. If the message appears,
download the emulation software again (page 130).
2. Cycle power. Run the print job again.
If the message appears, replace the CMX controller board. Record
the message and return it with defective CMX board.
UP DRV. SHORT* Message
1. Upper Driver Short. Hammer driver circuits on the CMX controller board
are shorted to ground.
Cycle power. If the message appears, press CLEAR. If the message
does not clear, replace the hammer bank logic cable and the hammer
bank power cable assemblies.
2. Power on the printer.
If the message appears, replace the CMX controller board. Record
the message and return it with defective CMX board.
3. Power on the printer.
If the message appears, replace the shuttle frame assembly.
Vertical misalignment of characters:
- Dots or characters move up or down from dot row to dot
row or line to line
- Incorrect spacing from dot row to dot row or line to line
- Characters randomly compressed and/or enlarged
1. Load paper. Press PAPER ADVANCE and check that paper feeds
smoothly. Press VIEW to verify that paper moves in both directions.
Check the forms thickness lever: if it is set too loose or too tightly print
quality can be affected.
Set the forms thickness lever to match the thickness of the paper
being used.
2. Check the paper feed motor pulley for looseness.