6-44 Removing and Replacing Parts
Engine Controller Board
Note After you replace the Engine Controller Board, do not forget to readjust
the top margin as described on page 6-46.
1 Separate the Engine from the Paper Feed Module (page 6-42).
The Engine Controller Board is on the underside of the Engine
and contains the following:
• DC controller
• High-voltage power supply
• AC power supply
• DC power supply
• Timing controls
Figure 6-41 Removing the Engine Controller Board
2 Remove the Fuser Assembly (page 6-18).
Spring
Power
switch
rod
(In the back, not on the board)
For more information on the LaserJet 4000 / 4050 Visit www.PrinterSupplies.com 800-551-1943
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