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Troubleshooting Analysis Guide (TAGs) 3-143
TAG 753: External Communications Malfunction
Error Code: 753
Symptoms: Test prints can be made but jobs do not run
Jobs do not print correctly
Possible Causes: Improper DIP switch settings
Host computer
Improper application
Possible Defects: IGS board communications cable
Cable connectors
Signal interface board
Diskette
Wrap connector
DC power supply unit
Attachment options.
1
Turn the printer off and unplug the power cord.
• Verify that J/P8, J/P32, J/P74, and J/P92 are connected properly.
• Verify that all communication cables are attached properly.
• Verify that the correct diskette is installed in the printer.
• Confirm that the DIP switches on the signal interface board are set to their proper positions.
• Power-on-reset the printer.
• Confirm that the printer’s soft configuration is set properly.
• Run the failing job.
Has the problem been resolved?
No: Continue.
Yes: Loose connectors, software configuration, or DIP switches were at fault. Determine
which of these is at fault, correct the problem, then turn to TAG 002: Check & Problem
Resolution.
2
Turn the printer off.
• Recheck the diskette for suitability.
• Verify that the DIP switch settings on signal interface boards are correct.
• Power-on-reset the printer.
• Confirm that the printer’s software configuration is set correctly to the interface you are using.
Has the problem been resolved?
No: Continue.
Yes: Software configuration or DIP switch settings were at fault. Determine which of these is
at fault, correct the problem, then turn to TAG 002: Check & Problem Resolution.
Note
Communication problems may require trial replacement of numerous
parts. After each trial replacement, run the job that exhibited the failure.