Canon i900D Series, Service Manual, Page: 26 / 52

3.4 Verification Items
(1) Service test print
After repair, perform the service test print, and check the following:
<Print check items>
- Check 1, top of form accuracy:
The line shall be within the paper.
- Check 2, EEPROM information: The destination shall be correct.
- Check 3, nozzle check pattern: Ink shall be ejected from all nozzles.
- Check 4, vertical straight lines: The lines shall not be broken.
- Check 5, halftone: There shall be no remarkable streaks or unevenness.
- Check 6, CD-R / automatic print head alignment sensor correction:
The results shall be OK.
- Check 7, media sensor correction: Nothing printed indicates that the correction has been implemented.
(If not implemented, “MEDIA SENSOR = NO CALIBRATE” is
printed.)
<Service test print sample>
Check 1:
Top of form accuracy
Check 2
EEPROM information
(Refer to the next page.)
Check 5:
Halftone
Check 3:
Nozzle check pattern
Check 4:
Vertical straight lines
Check 6:
CD-R / automatic print head alignment sensor correction
Check 7:
Media sensor correction
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