Canon image Prograf iPF780 Series, Service Manual

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Chapter 7
7-15
6) CR REG
Executes automatic head adjustment.
Make this adjustment if the resistration remains partially misregistered after user-mode head adjustment.
EXECUTE: Execute automatic head adjustment.
RESET: Reset the resistration adjustment value (0).
- Applicable media size is A2 (17inch) or larger.
- Applicable media type is photo glossy paper
If an error message appears when performing CR REG, check the following.
Replace the multi sensor if the error reoccurs after checking and performing CR REG again.
<CHECK>
1. Check for non-discharging of the printhead and dirty media, and replace the printhead and/or media if necessary.
2. Perform [Head Cleaning A].
3. Perform [Head Posi. Adj.]-[Auto].
7) CR MOTOR COG
Adjust the carriage motor rotation.
Perform in the following cases:
- When removing/attaching or replacing the carriage or carriage belt.
- When replacing the carriage motor or linear encoder sensor.
- When there is excessive load on the carriage (such as when jamming)
If the following error message appears when performing CR MOTOR COG, check that carriage and carriage belt are installed properly and clean the rail shaft. If
the error still occurs, replace the carriage motor.
F-7-9
8) MARGIN ADJ
This mode is to perform the fine adjustment of the leading and trailing edge margin.
Display Description
TOP MARGIN ADJ Set the fine adjustment value of leading edge margin.
Range: -5.0 to 5.0mm (in 0.1mm increments)
BTM MARGIN ADJ Set the fine adjustment value of trailing edge margin.
Range: -5.0 to 5.0mm (in 0.1mm increments)
PRINT PATTERN Print the pattern for checking the margin.
After adjusting the margin, make sure of the margin by printing the pattern.
E R R O R
C R V I B R A T I O N