Muratec MFX-2550 Field Engineering Manual page 244

4.5.5 Dark image density
Scanner section
Section Step Check item
Scanner 1
(Front side)
2
3
4
5
6
7
8
Section Step Check item
Scanner 1
(Back side)
2
3
4
5
6
7
8
Are the ADF glass and document
glass dirty?
Is the platen cover floating by copying
a thick volume?
Are the mirrors and lens dirty?
Is the LED lamp dirty or deteriorated?
Is the connection from LED lamp to
CCD board in good condition?
Is the connection from CCD board to
scanner board in good condition?
Is the connection from scanner
board to main control board in good
condition?
Is the connection from main control
board to high-voltage power board in
good condition?
Is the DADF glass dirty?
Are the mirrors and lens dirty?
Is the LED lamp dirty or deteriorated?
Is the connection from LED lamp to
CCD board in good condition?
Is the connection from CCD board to
R-Scanner board in good condition?
Is the connection from R-Scanner
board to RADF board in good
condition?
Is the connection from RADF board to
main control board in good condition?
Is the connection from main control
board to high-voltage power board in
good condition?
Result Remedy
YES Clean the parts, and adjust the
background level.
Copy with opened platen cover.
YES
YES Clean or replace the parts, and
adjust the background level.
YES Clean. / Replace.
NO Reconnect. / Replace harness.
NO Reconnect. / Replace harness.
NO Reconnect. / Replace harness.
NO Reconnect. / Replace harness.
Result Remedy
YES Clean the part, and adjust the
background level.
YES Clean or replace the parts, and
adjust the background level.
YES Clean. / Replace.
NO Reconnect. / Replace harness.
NO Reconnect. / Replace harness.
NO Reconnect. / Replace harness.
NO Reconnect. / Replace harness.
NO Reconnect. / Replace harness.
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