4511-xxx
2-46 Service Manual
NVRAM failure
Error codes 950–954 indicate a problem in the NVRAM (nonvolatile random
access memory). Replace the operator panel assembly. Codes 955–959
indicate a failed controller card assembly. Replace the controller card.
Note: NVRAM is on the operator panel printed circuit board while secure
NVRAM is on the controller card. Check margin alignments after
replacing the operator panel assembly. See “Printhead service
check” on page 2-111 for more information. If margin errors are
unacceptable, corrections can only be made through software.
Contact the next level of support.
Service tertiary error codes—NVRAM failure
Lights
Service
secondary
codes—
95x
Service teriary codes—NVRAM failure
950—Secure
EEPROM data
does not match
NVRAM
951—Secure
EEPROM failure
952—NVRAM CRC
failure
954—NVRAM
chip failure
955—Code ROM or
NAND failed CRC
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