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January 2000 © TOSHIBA TEC 4 - 57 FC-22 TROUBLESHOOTING
Criteria Measures
Perform following procedures from 2 and after.
Uneven pitch extending 2.5mm to 3mm within an area about Re-adjust paper feed motor rotation speed. * See P. 4-58.
130mm wide from leading edge of the image?
Re-adjust paper feed motor rotation speed. * See P. 4-58.
Does the roller surface lack in friction and is it slippery? Replace registration roller.
Uneven pitch extending approx. 2.9mm within an area about By fine adjustment (a few steps at a time), slacken paper slightly,
150mm wide from trailing edge of the image? not tighten it (to a straight line in side view) between transfer belt
Is paper tightened? and fuser unit.
Uneven pitch approx. 94mm overall?
Is there damage? Replace drum.
Is there any attached foreign matter? Clean or replace drum.
Troubleshoot drum driving.
Troubleshoot drum driving.
Is the value significantly different from the default value 1700? Reset drum motor rotation speed to 1700.
(The value shifts one step each in connection with transfer belt
speed)
Re-fasten screws.
Replace couplings.
Replace couplings.
Uneven pitch approx. 2.5 mm overall?
Uneven pitch approx. 75 mm overall? Re-fasten screws to fix tension arm.
Damaged or broken edge? Replace transfer belt (troubleshoot transfer belt).
Uneven pitch approx. 75 mm overall? Clean it.
Is there any stain?
Uneven pitch approx. 75 mm overall? Troubleshoot used toner system.
Replace cleaning blade (troubleshoot transfer belt).
Uneven pitch approx. 0.3 mm overall? Replace unit.