Instruction manual
74
Chapter 3 Troubleshooting Procedures
2. 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.
3. Check the condition and tension of the platen open belt.
Adjust the platen open belt. Replace the belt if it is damaged.
4. Check the platen gap.
Adjust the platen gap.
5. Power off the printer. Remove the paper guide assembly. Disconnect
connector P106 from the CMX controller board. Check the resistance of
connector P106/PLAT M. (Refer to the Main Wire Harness Test Tables in
Appendix A.)
Replace the platen open motor if it fails the resistance test.
6. Power on the printer. Press PAPER ADVANCE and VIEW several times
and check that paper moves in both directions.
Replace the CMX controller board if the platen does not open during
paper reverse.
Randomly misplaced dots
1. Power off the printer. Check the platen gap.
Adjust the platen gap.
2. Remove the paper guide assembly or pedestal top cover. On the left rear
wall of the card cage, make sure the nut which secures the line filter
ground line and the AC In Power Supply cable lead to the ground stud is
tight. (See Figure 42, page 232.)
Tighten the nut on the ground stud.
3. Disconnect the AC power cord and check the ground leads for continuity.
Replace the AC power cord if it fails continuity test.
4. Make sure the printer is plugged in to a grounded power outlet. Power up
the printer. Run a print test.
If the problem occurs, replace the hammer bank logic cable.
5. Power up the printer. Run a print test.
If the problem occurs, replace the flash memory and DRAM.
Download the emulation software again (page 130).
6. Power up the printer. Run a print test.
If the problem occurs, replace the CMX controller board.
7. Power up the printer. Run a print test.
If the problem occurs, replace the power supply board.
8. Power up the printer. Run a print test.
If the problem occurs, replace the shuttle frame assembly.