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Confidential
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Note:
If you have print quality problems, clean the drum unit as follows:
(1) Pull the drum unit out of the machine and take all the toner cartridges out of the drum unit.
(2) Turn the drum unit over by holding the handle. Make sure that the drum unit gears “1” are
on the left hand.
Fig. 1-6
Caution
We recommend that you place the drum unit on a clean, flat surface with a piece of disposable
paper underneath it in case you accidentally spill or scatter toner.
(3) See the print sample to identify the color causing the problem. The color of the spots is
the color of the drum you should clean. For example, if the spots are cyan, you should
clean the drum for cyan. Put the print sample in front of the drum, and find the exact
position of the poor print.
Fig. 1-7
“1”
Summary of Contents for HL-4040CN
Page 265: ...Confidential 4 7 11 Alert warning message of WHQL appears Click Continue Anyway to proceed ...
Page 320: ...Confidential 6 12 Charge High voltage Power Supply PCB Circuit Diagram 1 4 ...
Page 321: ...Confidential 6 13 Charge High voltage Power Supply PCB Circuit Diagram 2 4 ...
Page 322: ...Confidential 6 14 Charge High voltage Power Supply PCB Circuit Diagram 3 4 ...
Page 323: ...Confidential 6 15 Charge High voltage Power Supply PCB Circuit Diagram 4 4 ...
Page 324: ...Confidential 6 16 Transfer High voltage Power Supply PCB Circuit Diagram 1 2 ...
Page 325: ...Confidential 6 17 Transfer High voltage Power Supply PCB Circuit Diagram 2 2 ...
Page 326: ...Confidential 6 18 Low voltage Power Supply PCB Circuit Diagram 100V ...
Page 327: ...Confidential 6 19 Low voltage Power Supply PCB Circuit Diagram 200V ...