Gestetner B147, Service Manual

Page: 120 / 1081

IMAGE ADJUSTMENT
B147B149/B190 3-6 SM
Adjustment Procedure
1. Enter SP mode and access SP5-997.
2. Print out the pattern (14: 1-dot trimming pattern) with SP5-997.
NOTE: Registration may change slightly print by print as shown above.
Therefore print a few pages of the trimming pattern for step 3 and 4,
and average the leading edge and side-to-side registration values and
adjust each SP mode.
3. Perform the leading edge registration adjustment.
1) Check the leading edge registration and adjust it with SP1-001.
2) Select the adjustment conditions (paper type and process line speed).
3) Input the value then press the

key.
4) Check the leading edge adjustment by generating the trim pattern.
4. Perform the side to side registration adjustment.
1) Check the side to side registration and adjust it with SP1-002.
2) Select the adjustment conditions (paper feed station).
3) Input the value then press the

key.
4) Check the side to side adjustment by generating the trim pattern.
3.2.4 COLOR REGISTRATION
Line Position Adjustment
Normally, the automatic line position adjustment is executed under a specified
condition to optimize the color prints. If color registration shifts, execute “Auto
Adjust” with the user tools (Maintenance menu – Color registration) or SP5-993-2
to do the forced line position adjustment. In addition, it is recommended to perform
the line position adjustment under the following conditions:
•
After transporting or moving the copier (If copier are pre-installed at the
workshop and transported to the user location, forced line position adjustment
should be done after copier installation is completed at the user location.)
•
When opening the drum positioning plate
• When removing or replacing the motors, clutches, and/or gears related to the
drum/development/transfer sections
• When removing or replacing the transfer belt or laser optical housing unit
Adjustment of Line Speed for Thick Paper
You must adjust the line speed of the fusing unit (the speed of development motor-
K) under the following conditions:
•
The color registration shifts more on the trailing edge than on the leading
edge.
•
This problem has not been solved by the line position adjustment.