Lexmark T520 - 20ppm 8MB Par USB Pcl6 Ps3 Ppds Service Manual page 34

4520-xxx
Error Code
956, 957, 959
System Board
958 NAND
Failure
960 RAM
Memory Error
961 RAM in Slot
1 is Bad.
962 RAM in Slot
2 is Bad.
963 RAM in slot 3
is Bad.
964 Emulation
Error
965 Emulation
Error
2-6
Service Manual
Action
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 is
displayed, 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 controller board.
Replace the controller board.
Replace the card in Slot 1. If this does not fix the
problem, replace the controller board.
Replace the card in Slot 2. If this does not fix the
problem, replace the controller board.
Replace the card in slot 3. If this does not fix the
problem, replace the controller 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.
965 - Download Emulation Outdated, The Download
Emulation and the controller code are incompatible. Go
to the "Disabling Download Emulations" on page 3-5.