Canon MultiPASS C755 Service Manual - Page 113

Print Test Pattern Check, 2.5 PRINT test

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MultiPASS C755 Chapter 3: Maintenance & Service 7.2.5 PRINT test Pressing the 3 button from the test mode menu selects the print test. This test prints various patterns. For servicing, use the 3-7: CHECKERS pattern (press the 7 button from the print test menu). The other patterns are not to be used since they are for development and factory personnel. End this test by pressing the Stop button. Refer to page 3-32 if blank ink appear, etc occur. Check the pattern for the following: Check for any vertical or horizontal white stripes on the black squares. Also, check that all the squares have straight edges on all four sides. Figure 3-30 Print Test Pattern Check NOTE If the print test is normal, make a copy of a document. If the copy is faulty, the reading section is faulty. Please do not select the following menus: 3-1: MONO PTN. 3-2: CLR PTN. 3-3: CLR PTN2 If a mistake is made and these menus are selected, the value of #7 PRINTER 5. INK ABS CAPA will be reset to 0%, so it will be necessary to re-register. Check the value of LostInkCount. printed on the top of each test pattern, and register this value in #7 PRINTER 5. INK ABS CAPA. If the absorption amount has been forgotten, replace the waste ink absorber and set to 0% 3-62

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3-62
MultiPASS C755
Chapter 3: Maintenance & Service
7.2.5 PRINT test
Pressing the
3
button from the test mode menu selects the print test.
This test prints various patterns.
For
servicing, use the 3-7: CHECKERS pattern (press the
7
button from the print test menu).
The other
patterns are not to be used since they are for development and factory personnel.
End this test by pressing
the
Stop
button. Refer to page 3-32 if blank ink appear, etc occur.
Check the pattern for the following:
If the print test is normal, make a copy of a document.
If the copy is faulty, the reading
section is faulty.
Please do not select the following menus:
3-1: MONO PTN.
3-2: CLR PTN.
3-3: CLR PTN2
If a mistake is made and these menus are selected, the value of
#7 PRINTER 5. INK
ABS CAPA
will be reset to 0%, so it will be necessary to re-register.
Check the value of
LostInkCount. printed on the top of each test pattern, and register this value in
#7
PRINTER 5. INK ABS CAPA
.
If the absorption amount has been forgotten, replace the
waste ink absorber and set to 0%
Check for any vertical or horizontal white
stripes on the black squares.
Also, check that all the squares have
straight edges on all four sides.
Figure 3-30 Print Test Pattern Check
NOTE