February 2013
6-89
ColorQube® 9303 Family
GP 30
General Procedures/Information
GP 30 How to Mask Jets / Jet Substitution
Purpose
Use this procedure to manually mask jets. The masked jet will be substituted by an adjacent
jet.
Procedure
• Enter Service Mode, GP 1.
• Select the Adjustments routine.
•Select dC131 NVM Read / Write.
• Enter the appropriate NVM location.
• Select Read.
Selecting an unused link
The NVM locations used for manually masking jets is 445-9 through 445-48. When manually
masking a jet, the specific location to use is not important provided the value in the location
where you wish to enter a 5 digit masking value is 0. If a value other than 0 is seen, do not
enter a new value. Keep moving to the next location until a value of 0 is found.
Masking the jet
Enter Chain 445, links (9-48)
Jets are masked in NVM locations 445-9 through 445-48 by entering a 5 digit number which
represents the head, color and number of the jet to be masked. This 5 digit number uses the
format ‘HCJJJ’ where H = head number, C = colour (Cyan = 1, Magenta = 2, Yellow = 3, Black
(K) = 4) and JJJ = jet. Jet numbers must be 3 digits in length – zero-fill as necessary (jet 4
would be 004).
Example: to mask yellow jet 44 on head 2 enter: 23044. Select write.
Verify the masking by printing the service jet test pages from dC968 Head Purge.
The masked jet number should be marked in green text. Refer to TP 21 Jet Test Pages for
more details.
Identify a Masked Jet
To identify the particular masked jet to be cleared, enter the chain 445 and cycle through the
link numbers 9 to 48. Select read every time the link number is changed. Compare the desired
jet to the output. If they matched then proceed to next step, if not enter the next link number
and repeat procedure.
Clearing the masked jet (reset)
Once the link of the desired jet is identified, enter 0 and select write.
Verify the masking by printing the service jet test pages from dC968 Head Purge.
The jet number should be marked in black / purple / red text. Refer to TP 21 Jet Test Pages for
more details.
Marking restrictions and recommendations
The software will restrict the following:
• Masking more than 40 jets.
• Masking a jet adjacent to another masked jet.
• Masking a jet adjacent to another chronic jet.
Do not mask black or colour jets that are within the A4 LEF print zone (i.e. the chronic jet is not
in Head 1 between 1 to 12 or Head 4 between 208 to 220). The software will not restrict mask
-
ing. The masking of black jets in the print zone is not recommended, but if required the soft-
ware will allow it. Verify the jet location by printing the service jet test pages from dC968 Head
Purge.
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