Canon FY8-23AV-000 manual Image Adjustment Basic Procedure, Pre-Checks

<Pre-Checks>

Clean the parts.

Scanning system, pick-up/feeding system, and delivery assembly.

	Is the
NO	setting of the density
	correction switch at the
	middle?
	YES

Set the switch to the middle.

Select non-AE, and set the density control dial/lever to 5.5; then, make two to three copies of the Test Chart (NB-3, NA-2, NA-3); see Note 1.

Check the following:

1.Density of gray scale No. 9; see Note 2.

2.Difference in density between front and rear; see

Note 3.

3.Density of gray scale No. 1; see Note 3.

4.Fogging in white area; see Note 3.

<Optimum Density Adjustment>

Is gray

YES

scale No. 9 barely noted?

(See Note 2.)

NO

Is the
problem corrected by	YES
the density correction
switch?

NO

Is
optimum
density obtained by	YES

adjusting the intensity of

light?

(See

NO

Check the following:

1.Cartridge.

2.Scanning lamp unit.

3.DC controller/DC power supply PCB (see “Troubleshooting by Image Fault”).

E. Image Adjustment Basic Procedure

End.

End.

Notes:

1.If a mono color cartridge is used, set the density control dial to 4.5.

2.If NB3 is used, refer to gray scale No. 10.

3.The machine is not equipped with an adjustment function for each type of image fault; see “Troubleshooting by Image Fault.”

4.For instructions on how to adjust the intensity of light, see p. 2-2.

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