Lexmark C78x User Manual

2-12 Service Manual
5061
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

Lexmark C78x Specifications

General

Brand	Lexmark
Model	C78x
Category	Printer
Language	English