Printer Message Troubleshooting Procedures

When the following procedures require removing and replacing an assembly or PCA, refer to the applicable section in Chapter 6 for instructions.

Blank Display

Table 7-3	Blank Display

Checks			Action

Is the power on?		1.	Check the ON/OFF switch and verify the power is
			plugged in.
		2.	Press a Control Panel key to verify problem still
			exists.

Is the fan working?		1.	If the fan is working, check the cabling to the
			Control Panel. If the cabling is good, replace the
			Formatter first, then the Control Panel.
		2.	If the fan is NOT working, measure the DC
			voltage levels (refer to Table 7-39). If the voltage
			levels are good from the power supply to the DC
			Controller and the fan is not working, replace the
			DC Controller. If the voltage levels are not present
			at TB1, replace the DC Power Supply.

7-12 Troubleshooting