Printronix L1024, Maintenance Manual

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13–41 Chapter 13 – Troubleshooting Guide
32 MISPRINT ERROR—Call Service
1. This usually indicates a handshaking or communication error between the Engine Controller
Board and the Data Controller Board during normal operation. One board is not responding to
the other’s command or request for status.
a. Cycle power to the printer. If the error returns, continue with the following steps.
b. Verify that the Engine Controller Board and the Data Controller Board are properly
seated on the Backplane Board.
c. The Engine Controller Board is not responding to the Data Controller Board. Replace
the Engine Controller Board.
d. The Data Controller Board is not responding to VSREQ soon enough. Replace the
Data Controller Board.
33 REPLACE EEPRM—Call Service
1. The life count of the EEPROM on the Engine Controller Board has exceeded 100,000
writes. The EEPROM stores all of the page counts for the components of the printer. Data
is written to the EEPROM every time the printer is powered down.
a. Record all page counts, then replace the NVRAM chip on the Engine Controller Board.
b. The Engine Controller Board is faulty and must be replaced.
c. The Data Controller Board is faulty and must be replaced.
34 REPLACE OPC DRUM—Call Service
1. The page count of the OPC Drum Unit has exceeded 30,000 pages (normalized to an 11 inch
page length).
CAUTION: If you ignore this error message, the printer will continue to print, but
the print quality will become unacceptable.
a. Replace the OPC Drum Unit.
b. The NVRAM chip on the Engine Controller Board is not recording page counts
correctly. Replace the NVRAM chip on the Engine Controller Board.
c. The Engine Controller Board is faulty and must be replaced.
35 EC CKSUM FAIL—Call Service
1. A checksum error occurred while reading the EEPROM on the Engine Controller Board.
a. Replace the NVRAM chip on the Engine Controller Board.
b. The Engine Controller Board is faulty and must be replaced.