Lexmark T63x Service Manual page 38

4060-xxx
Service error code (continued)
Error code
954 NVRAM CRC
Failure
955 Code CRC
<loc>
956, 957, 959 System
Board
958 NAND Failure
960 RAM Memory Error
961 RAM in Slot 2 is
Bad
962 RAM in Slot 1 is
Bad
964 Emulation Error
975 - 979 Network
Card x
980 <device> Comm
981 <device>
982 <device> Comm
983 <device>
984 <device>
2-4
Service Manual
Action
Indicates the NVRAM experienced a CRC failure. Replace the interconnect board.
Replace the system board. Where <loc> = CRC Failure or ECC Failure on the
system board.
Error codes 956 thru 959 are system board failures.
Perform a power on reset (POR). If this does not fix the problem, replace the
system board.
• 956 = Processor failure
• 957 = ASIC failure
• 959 = SRAM failure
Before proceeding when a 958 NAND failure displays, perform a power on reset
(POR) to see if the ECC error correction code can reflash NAND.
If this does not fix the problem, replace the system board.
Indicates a DRAM Memory Error on the system board. Replace the system board.
If another SDRAM memory DIMM is installed in slot 1, turn the power off, switch
the DIMM in slot 1 to slot 2. If the memory in slot 2 now works correctly, replace
the failing DIMM that was in slot 2. If this does not fix the problem, replace the
system board. If another DIMM is not available, replace the memory option. If this
does not fix the problem, replace the system board.
If another SDRAM memory DIMM is installed in slot 2, turn the power off, switch
the DIMM in slot 2 to slot 1. If the memory in slot 1 now works correctly, replace
the failing DIMM that was in slot 1. If this does not fix the problem, replace the
system board. If another DIMM is not available, replace the memory option. If this
does not fix the problem, replace the system board.
Indicates a failure within the Download Emulation which is programmed into the
code overlay card. The specific error is as follows:
964 - Download Emulation CRC Failure. Checksum Failure. Go to
Download Emulations" on page
The following errors indicate a failure with the network card in the specified slot.
(x=any card installed in slots 1 or 2.)
• 975 - Unrecognizable Network Card x. Replace network card x.
• 976 - Unrecoverable software error in network card x.
• 978 - Bad checksum while programming network card x. Replace network
card x.
• 979 - Flash parts failed while programming network card x.
If the printer is a network model, replace the system board.
The engine is experiencing unreliable communications to the specified device.
The engine protocol violation detected by the specified device.
Communications error detected by the specified device.
Invalid command received by the specified device.
Invalid command parameter received by the specified device.
Note: Service errors 980 thru 984 <device> can be one of the following: system
board, duplex, tray x (1, 2, 3, 4, or 5), envelope feeder or output bin.
3-3.
"Disabling