Lexmark C77X, Service Manual

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Service Manual
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921. xx Registration Unrecoverable Registration Sensor Error—Replace the ITU assembly. See “ITU
assembly removal” on page 4-49 .
925.02 Fan Stalled Fuser fan—Go to “925.02 error code service check” on page 2-56 .
926.01 Fan Stalled VTB fan—Go to “926.01 error code service check” on page 2-56 .
927.03 Fan Stalled RIP Fan—Go to “927.03 error code service check” on page 2-57 .
930.09 LV Power
Supply Unable to find zero crossover point—Replace the LVPS. See “LVPS assembly
removal” on page 4-53 .
940. xx TMC Error—
Cyan
Cyan TMC switch failure—Go to “940.xx error code service check” on page 2-58 .
941. xx TMC Error—
Magenta
Magenta TMC switch failure—Go to “941.xx error code service check” on
page 2-60 .
942. xx TMC Error—
Yellow
Yellow TMC switch failure—Go to “942.xx error code service check” on
page 2-62 .
943. xx TMC Error—
Black
Black TMC switch failure—Go to “943.xx error code service check” on page 2-64 .
950.00 to 950.29
NVRAM Failure Either the system board or the operator panel assembly you just replaced was not a
blank FRU. Replace that part with a new FRU.
950.30 to 950.60
NVRAM Failure Either the system board or the media size sensing board you replaced was not a
blank FRU. Replace that part with a new FRU.
951. xx NVRAM
Failure
NVRAM chip failure—replace the media size sensing board. See “Media size
sensing board removal” on page 4-58 .
952. xx NVRAM
Failure
NVRAM chip failure—POR the printer.
953. xx NVRAM
Failure
NVRAM chip failure operator panel assembly—replace the operator panel assembly.
See
“Operator panel assembly removal” on page 4-68 .
954.xx NVRAM
Failure NVRAM chip failure—Replace the system board. See “System board removal” on
page 4-90 .
955. xx Code CRC
< loc >
System board—This error indicates that the Code ROM or NAND failed the CRC
check. The location of the failure is indicated by <
loc >. Replace the system board.
See “System board removal” on page 4-90 .
956. xx Service
< xxxx>
System Board
Go to “956.xx service error service check” on page 2-66 .
957. xx System Board
ASIC Failure
Replace the system board. See “System board removal” on page 4-90 .
958. xx NAND Failure Replace the system board. See “System board removal” on page 4-90 .
960. xx RAM Memory
Error
RAM soldered on board is bad. Replace the system board. See “System board
removal” on page 4-90 .
961. xx RAM Memory
Error
There is an error in the memory installed in the memory option slot 1 on the system
board. If another memory option is available, switch the memory options to isolate
the problem. If you do not have a spare memory option to switch, then replace the
memory installed. If this does not fix the problem, replace the system board. See
“System board removal” on page 4-90 .
Error codes and paper jam messages (continued)
Error code Action