Diagnostic information 2-65
4500
Cooling fan service check (E320/E322)
Service checks involve measuring voltages of the LVPS,
high voltage power supply (HVPS), and controller card
assembly. Continuity and resistance verifications are
done on cables and components as required.
Note: When looking at the printed side of a PCB, connectors are
designated with “J” followed by a number. Pin 1 is designated
on the PCB by an adjacent “1” or triangle. Pin numbers index
sequentially to the opposite end of the connector. See “RIP
controller (E220/E321/E323 only) ” on page 5-8 for more
information.
FRU Action
Cooling fan Make sure the cooling fan motor
cable plug is properly seated on the
engine board.
Unplug the printer and disconnect
the cooling fan cable on the engine
board.
Restore printer power. Within
approximately 3 seconds the engine
board should apply +24 Volts direct
current (V dc) to the fan. See
“Connector locations ” on
page 5-1 for more information.
• If voltage is present, replace the
cooling fan.
• If voltage is not present, see the
“Engine board service check
(E320/E322) ” on page 2-72 for
more information.
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