Gestetner G060, Service Manual

Page: 155 / 1106

TROUBLESHOOTING GUIDE
SM 4-41 G060
Adjustment Standard: Max. 200
µ
m
As a machine capability, maximum amount of color shift is 200
µ
m. Adjusting the SP modes (motor speed, registration, and
magnification) can improve the color shifts level; however, there is a limit.
Preparation
When color shift is reported, the following procedure should be done before adjusting the machine and/or SP modes.
1. Print out the SMC sheets (SP5-990-002).
2. Do the forced line position adjustment (SP5-993-002 or ‘Auto Adjust’ in the User Program mode).
NOTE: Make sure that the result (SP5-993-007) is “0101”. If not, solve the problem by referring
to pages 4-2 and 4-3.
3. Print a 1-dot grid pattern using A3/11”x17” paper. Refer to the following table for the detailed SP mode settings.
Mode SP5-997 (Test Pattern) Setting
Tray
selection
Pattern Color mode Resolution
Paper size
(By-pass)
Normal, color, 600 dpi 2 05 Full Color 600x600 —
Normal, color, 1200 dpi 2 05 Full Color 1200x1200 —
Thick paper 0 05 Full Color 1200x1200 A3 / 11x17
NOTE: When making prints on thick paper from the by-pass tray, the type of paper should be selected in the User Program
mode. Any adjustment needs to be done by using the type of paper which the customer normally uses.
4. Check the tendency of color shift in the grid pattern printed in step 3. Sometimes, a magnification scope must be used to
measure the amount of color shift between colors.
5. Take the required action explained in each section depending on the type of color shift.
6. Do the ‘Auto Adjust’ in the User Program mode after the adjustment is done in step 5, and check the result.
7. Repeat steps 3 to 6 until the color shift is acceptable.
Rev. 09/2003