Table 7-3. No AC Power

Cause

Action

No correct voltage present at the outlet.

Plug the power cord into another AC circuit outlet.

Inform the customer that the correct line voltage is not available at the outlet.

The power cord is not firmly plugged into the printer and the outlet.

Blown fuse.

Defective power switch.

Insert the power plug firmly.

1.Check the fuses (FU1 and FU2) on the Engine Controller Board.

2.Replace the fuses if necessary.

Remove the Engine Controller Board. 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 1KΩ) when the power is turned ON, and high (over 6MΩ) when the Switch is turned OFF. Otherwise, replace the Engine Controller Board.

Defective AC receptacle or AC power line.

Check the printer’s AC receptacle and wiring for the AC power line. If no problem is found, replace the Engine Controller Board.

Troubleshooting the Printing System 7-9