Lexmark C750 Service Manual page 41

Error code
917 Trans Sensor
920 Color Calibrate
921 Color Calibrate
922 Color Calibrate
925 Fan Stalled
926 Fan Stalled
927 Fan Stalled
930 LV Power Supply
931 LV Power Supply
939 RIP Engine Comm
940 TMC Error - Cyan
941 TMC Error - Magenta
942 TMC Error - Yellow
943 TMC Error - Black
951 NVRAM Failure
952 NVRAM Failure
953 NVRAM Failure
954 NVRAM Failure
955 Code CRC <loc>
956 System Board Processor
Failure
957 System Board ASIC Failure
958 NAND Failure
Action
Tray 4 Transparency Sensor Error—replace Tray 4 transparency sensor
assembly. If this does not fix the problem, replace the engine board. See
"Engine board removal" on page
Unrecoverable TPS Gain Error—replace the ITU assembly. See
assembly removal" on page
Unrecoverable TPS Error—replace the ITU assembly. See
assembly removal" on page
Unrecoverable TPS Invalid Belt—replace the ITU assembly. See
assembly removal" on page
Fuser Fan—go to "925 Error code" on page
VTB Fan—go to "926 Error code" on page
RIP Fan—go to "927 Error code" on page
Unable to find zero crossover point—Replace the LVPS. See
voltage power supply (LVPS) removal" on page
Invalid AC Frequency—the AC power line frequency may be incorrect.
Go to "AC power service check" on page
The RIP card processor cannot communicate with the engine processor.
Check the RIP to engine cable for correct installation. If installed correctly
replace the RIP board. See
If this does not fix the problem, replace the engine board. See
board removal" on page
Cyan toner metering cycle (TMC) switch failure—go to
on page 2-93.
Magenta toner metering cycle (TMC) switch failure—go to
code" on page 2-95.
Yellow toner metering cycle (TMC) switch failure—go to
code" on page 2-97.
Black toner metering cycle (TMC) switch failure—go to
on page 2-99.
NVRAM Chip Failure, engine board—replace the engine board. See
"Engine board removal" on page
NVRAM CRC Failure, engine board—replace the engine board. See
"Engine board removal" on page
NVRAM Chip Failure, RIP board—replace the RIP board. See
board removal" on page
NVRAM CRC failure—replace the RIP board. See
on page 4-70.
RIP 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
RIP board. See "RIP board removal" on page
Errors 956 and 957 indicate which area of the controller (RIP) card failed.
Replace the RIP board. See
Replace the RIP board. See
Replace the RIP board. See
4-29.
4-37.
4-37.
4-37.
2-90.
2-90.
2-91.
4-38.
2-112.
"RIP board removal" on page
4-29.
4-29.
4-29.
4-70.
"RIP board removal"
4-70.
"RIP board removal" on page
"RIP board removal" on page
"RIP board removal" on page
Diagnostic information
5060-00x
"ITU
"ITU
"ITU
"Low
4-70.
"Engine
"940 Error code"
"941 Error
"942 Error
"943 Error code"
"RIP
4-70.
4-70.
4-70.
2-7