The Copy Has A Block/White Dot After Replacement Of The Drum Unit; The Copy Has A Black Line (Stream Reading) - Canon iR2200 Service Handbook

3.23 The copy has a block/white dot after replacement of the
drum unit.
1) Execute the following in service mode: FUNCTION>DPC>D-
GAMMA. Then, make copies of the NA-3 Chart. Is the copy image nor-
mal?
YES: End.
Drum unit
2) Set the following to '1': OPTION>BODY>PRIAC-SW. Then, make
copies of the NA-3 Chart. Is the copy image normal?
YES: End.
NO:

3.24 The copy has a black line (stream reading).

Reading glass, Dirt
1) Does the problem occur on the same position on all copies?
YES: Check the reading glass for dirt and a scratch.
NO:
CHAPTER 4 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
Replace the drum unit.
Paper lint (droppings) can be suspected. Clean the ADF roller,
original path, and reading glass.
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