EN Chapter 7 Troubleshooting 189
The fan does not turn on
when the printer is first
powered up.
Note
An operational fan indicates the following:
1. AC power is present in the printer.
2. DC power supply is functional (both 24 VDC and 3.5
VDC are being generated).
3. The engine controller board’s microprocessor is
functional.
If the fan is not working:
1. Turn the printer off and remove the formatter. Disconnect
the optional accessories.
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.
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.
The fan works, but the
control panel display is
blank.
1. Print an engine test. See “Engine test” on page 190.
2. 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 firmware DIMM.
d. Replace the cable from the control panel.
3. If the engine test is not successful, replace the engine
controller board.
Table 36. Power on defect or blank display (continued)
Problem Action
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