IBM 6500-V1P Maintenance Manual - Page 52
Rate, Data Bits, Stop Bits, Parity, Data Terminal Ready, and, Request to Send.
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Chapter 1 Troubleshooting Display Messages Operator Panel Message 019 STACKER FAULT CHECK STACKER (continued) 021 BUFFER OVERRUN VERIFY CONFIGURATION 022 UNIT ADDRESS INVALID CHECK PRINTER ADDRESS Table 3. Message List Explanation Corrective Action The print buffer has overflowed on a serial interface. The printed output may contain random * (asterisk) characters. Poll timeout on the twinax interface indicating the unit address is not recognized by the printer. a. If you encounter loading problems, go to the appropriate error code for resolution. b. If you encounter the failure or message that brought you to this procedure, replace the controller board (page 319). After replacing the controller board, DO NOT make the printer READY, but proceed immediately to the next step. 11. Download and install the latest code from IBM First (page 231). 12. Power on the printer in download mode and load flash memory (page 238). 13. If you encounter the failure after replacing the controller board, reinstall the original controller board and contact your DDS and Second Level Support. 14. If the problem reappears, replace the stacker motors. 1. Make a configuration printout. Verify that the printer matches the host serial interface configuration settings for Data Protocol, Baud Rate, Data Bits, Stop Bits, Parity, Data Terminal Ready, and Request to Send. 2. Set printer serial interface parameters to match those of the host. 3. Send a print job to the printer. If the message appears, go to Communications Failures, page 211. Have the system administrator make sure the printer address is correct. 52