Appendix A: Troubleshooting A–91This message indicates that the printer has received an unprintablegraphic. This message only appears if the Set Graphic Error ActionCommand has been set properly.Clear the message (Clear key), then place the printer back Online.Confirm with host why Graphic check message was sent.The software controlling the print hammer timing has detected aninternal inconsistency.Press the Clear key. If it faults repeatedly, call your Customer ServiceRepresentative and skip to the next print job.One of the hammer drive circuits was turned on when it shouldn’t havebeen, so all printing has been disabled. The usual cause is a failed drivetransistor.Call your Customer Service Representative for repair.A high resistance coil fault has likely occurred in one or more of thehammer coils. Note: this fault message will have been preceded byprinting slow-down attempts associated with On-The-Fly thermalmonitoring of hammer bank temperature.Check the hammer bank for defective coils. Confirm that the hammerdriver board is functioning properly. Replace the hammer driver board.Call your Customer Service Representative for repair.Graphics memory space is full and the printer cannot accept or processdata. Printer will reset and data will be lost.Insert line terminators in data stream so the printer will process thedata, then retransmit the data.Key has no function for this printer model or mode of operation.No corrective action.Certain communication signals have been lost between the printer andthe host computer.Check cable connection, setup of host, and printer address setting.The host is not communicating with the printer.Verify address of computer and host setup. Check I/O cables.When this message is displayed during printer installation, you maycontinue to test the printer by placing the printer Offline and enteringMenu mode to select print tests or calibration routines.A VFU command was received from the host before a VFU was down-loaded.Download the required VFU information, then retransmit the data.The nonvolatile data checksum has failed because of one of the followingconditions:(1) A new RAM has been installed.(2) New software with different nonvolatile variables has beeninstalled.(3) The variable values have been altered in a destructive manner.Depress the Clear key. If the message does not clear, cycle printer power.If the message still does not clear, call your Customer Service Represen-tative for repair.Error MessagesGraphic Check Explanation:Corrective Action:HammerTime Explanation:Corrective Action:HammerVoltage1 Explanation:Corrective Action:HammerVoltage2 Explanation:Corrective Action:Heap Overflow Explanation:Corrective Action:Key Disabled Explanation:Corrective Action:Lost Adrs (27) Explanation:Corrective Action:Lost Sync (28) Explanation:Corrective Action:No VFU Loaded Explanation:Corrective Action:NVRAM Fault Explanation:Corrective Action: