Maintenance - Samsung ML-920 Service Manual

Troubleshooting

4-4-5 MAINTENANCE

ADJUST SHADING
The function is to control to get the optimum scan quality by the specific character of the CIS(Contact Image
Sensor) If the copy image quality is unsatisfied, perform the function to check the condition of the print out for
checking whether or not having CIS trouble.
< Method >
1. Select [ADJUST SHADING] from the TECH MODE.
2. Insert a clean white original [Letter Size] into the paper loading part.
3. Original is scanned if pressing the Enter button.
4. If the original scan is completed, message is displayed on the LCD window and CIS SHADING PROFILE is output.
5. If the output image is different from the normal screen, the CIS is poor.
Caution:
1. Always perform the CIS TEST after downloading Firmware. Otherwise, the system may not operate properly.
2. Always perform ADJUST SHADING after replacing the CIS.
3. Always use a clean white paper in ADJUST SHADING (Maximum paper width: Letter Size).
ADJUST SHADING may be performed even in the User Mode but ADJUST SHADING profile is output only in the
TECH MODE.
< ADJUST SHADING >
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