Operating instructions

Troubleshooting
76
7
Functional problem within
the printer.
Turn power switch off, then
on.
If the error appears again,
please call service.
SC670
It is impossible to communi-
cate with the engine.
Turn off the main power, and
then turn it on again.
If the error occurs again, con-
tact service people to repair it.
No Response from I/O Device
Check the cable, power cord,
and main switch.
No information has been re-
ceived from the printer.
Check the main power switch
is turned on and the power
cord is securely connected.
Check the USB or network ca-
bles are securely connected al-
so.
Toner Density Sensor requires
cleaning.
Color registration failed. Clean the toner density sen-
sor.
See p.64 “Cleaning the Toner
Density Sensor”
Message Explanation Recommended Action