188 Troubleshooting EN
Power on
Note It is important to have the printer control panel functional as soon as possible in the troubleshooting
process so that the printer’s diagnostics can assist in locating printing errors.
Table 36. Power on defect or blank display
Problem Action
The power cord is not
plugged into the wall
outlet and the printer.
Make sure the power cord is firmly plugged into the printer
and the outlet.
Proper AC power is not
available.
Measure the voltage at the outlet. If necessary, plug the
power cord into another AC circuit outlet.
The power switch is off. Set the switch to the on position. You should hear the
switch toggle. If the front right side cover has been
removed recently, be sure that the rod leading to the power
supply moves as the rocker switch is toggled.
If the printer still does not turn on, the power switch might
be defective.
1. Remove the engine controller board.
2. Measure the resistance between the two terminals of the
power switch (SW1) by applying the tester probes to the
terminals. The resistance must be low (under 1 K
Ω)
when
the power is turned on, and high (over 6 M
Ω
) when the
switch is turned off.
3. Replace the engine controller board
,
if necessary.
The overcurrent/
overvoltage detection
circuit is activated.
Wait for more than two minutes before turning the printer
back on.
A fuse is blown. 1. Check the fuses (FU1 and FU2) on the engine controller
board.
2. Replace the fuses if necessary.
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