Canon MultiPASS C50 Service Manual page 120

Part 1: Facsimile
1.3 Periodic Inspection
None
1.4 Periodic Replacement Parts
None
1.5 Adjustment Items
The following adjustments must be made on this fax.
For the adjustment procedure, see 3. ADJUSTMENT on page 3-6.
Item
CS LED lights-on duration
adjustment
Vertical Alignment
adjustment
Head gap
NOTE
When
When the SCNT board, or the lithium battery, or the contact
sensor are replaced. Also, when the color or brightness of the copy
image or transmission image is not normal.
When the vertical lines shift during Bi-directional printing.
When the carriage guide frame and the platen installation positions
have been moved, resulting in the head gap changing.
CS LED automatic lights-on duration adjustment
The lights-on duration data for each color are on the SCNT board. The data are also
backed up in SRAM. When power is turned on, the data are checked by check sum. If
the data are incorrect, the lights-on duration is corrected automatically. If a document is
detected, the data cannot be adjusted. The LCD display reads "CHECK
DOCUMENT". After the document is removed, the display reads "PRESS
START/COPY". If you press the START/COPY button, and themachine will readjust
the lights-on duration.
3-2