IBM 6400 series Maintenance Manual page 90

If the message appears, replace the power supply board.
5. Power on the printer.
If the message appears, replace the CMX controller board. Record the
message and return it with the defective board.
6. Power on the printer.
If the message appears, replace shuttle frame assembly.
085 CONTROLLER VOLTAGE
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.
086 CONTROLLER 15V
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. Also 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.
4. Power on the printer. Run the print job again.
90 Troubleshooting