IBM 6500-V05 Maintenance Manual - Page 149

Operator Panel Message B54 ERROR: SDA LINE STUCK LOW B55 SEND PROGRAM TO EC BOOT DIAGNOSTICS CLEARING PROGRAM FROM FLASH DIAGNOSTIC PASSED DO NOT POWER OFF DOWNLOADING XX% Display Messages Table 3. Message List Explanation Corrective Action The serial data signal has shorted low on the controller board. 1. Cycle power. If the message appears, replace the controller board (page 319). After replacing the controller board, DO NOT make the printer READY, but proceed immediately to the next step. 2. Download and install the latest code from IBM First (page 231). 3. Power on the printer in download mode, and load flash memory (page 238). 4. If you encounter the failure after replacing the controller board, reinstall the original controller board and contact your DDS and Second Level Support. Status message: the printer is No action required. loading the engine controller program into the engine controller. Non-error status message. No action required. Status message: emulation software successfully loaded into printer RAM and the checksum matched. The old program is now being deleted from flash memory. No action required. Status message: the printer passed its memory and hardware initialization tests. No action required. Status message: the printer is downloading emulation software into RAM. XX% indicates the percentage of program that has been loaded. Powering off the printer while software is loading can damage the flash memory. No action required, but do not power the printer off while code is being loaded. 149