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7-8 Troubleshooting
Note The Fan only operates during initial power on and while printing, unless
the temperature inside the printer is too high. If the temperature is too
high, the Fan turns on to cool the inside of the printer.
Does the Fan turn on for
about 4 seconds when you
first turn the printer on?
Note: Fan operation is significant since the Fan is controlled by
the printer’s Engine Controller Board. An operational Fan
indicates the following:
1. AC power is present in the printer.
2. DC power supply is functional (both 24VDC and 3.5VDC are
being generated).
3. The Engine Controller Board’s micro-processor is functional.
If the Fan is not working:
1. Turn the printer off and remove the printer’s Formatter PCA.
Disconnect all the printer’s Paper Handling Options.
2. Turn the printer on and check the Fan again.
If the Fan is still not working, perform the following steps:
1. Verify that the fan is connected to the Engine Controller Board.
2. Replace the Fan.
3. Replace the Engine Controller Board.
If the Fan is working but the printer’s Control Panel is blank:
1. Print an Engine Test. See “Engine Test” on page 7-11.
If the Engine Test is successful, perform the following steps:
a. Reseat the Control Panel and Formatter Connector.
b. Replace the Control Panel Assembly.
c. Replace the Formatter.
d. Replace the cable from the Control Panel.
2. If the Engine Test is not successful, replace the Engine
Controller Board.
Table 7-2. Power On Defect or Blank Display (continued)
Problem Action