Konica Minolta BIZHUB 501 Service Manual page 339

10. SERVICE MODE
No.11 Beam check (8-bit output)
[Check item 1]
• Check to see if there is a difference in density found with the solid black pattern in the main scan and sub
scan directions.
[Recommended sections to be checked]: Charging corona, transfer/separation corona, developing unit,
and write dust-proof glass.
[Check item 2]
• Check to see if an image crawling occurs with the gradation pattern at the leading edge and/or trailing
edge of the test pattern in the sub scan direction.
[Recommended sections to be checked]: Transfer/separation corona
Test pattern
[1] Solid black pattern
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Field Service Ver.2.0 Mar. 2009
[1]
[2]
[2] Gradation pattern
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