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January 2000 © TOSHIBA TEC 4 - 55 FC-22 TROUBLESHOOTING
Criteria Measures
Perform following procedures from 2 and after.
Grid line deviation? Color registraion control forced performing.
Parallel deviation in secondary-scanning, occurring all over the Re-adjust paper feed motor speed. * See P. 4-58.
face, almost in order Y-M-C-K from paper exit side?
Re-adjust paper feed motor speed. * See P. 4-58.
Does the roller surface lack in friction and is it slippery? Replace registration roller.
Parallel deviation in secondary-scanning, occurring all over the By fine adjustment (a few steps at a time), slacken paper
face, almost in order Y-M-C-K from paper exit side? slightly, not tighten it (to a straight line in side view) between
Is paper tightened? transfer belt and fuser unit.
Is paper tightened? Increase the value of 05-408 (correction of fuser motor
rotation speed in the thick paper 3 mode), by finely adjusting
a few steps at a time.
Troubleshoot drum driving.
Troubleshoot drum driving.
Is the value significantly different from the default value 1700? Reset drum motor speed to 1700.
(The value shifts one step each in connection with transfer belt
speed.)
Tighten screws.
Replace couplings.
Replace couplings.
Fluctuating primary-scanning deviation? Replace belt (troubleshoot transfer belt).
Damaged or broken edge?
Fluctuating secondary-scanning deviation? Clean it.
Is there any stain?
Fluctuating secondary-scanning deviation? Troubleshoot used toner system.
Replace cleaning blade(troubleshoot transfer belt).
Deviation at front or rear of primary-scanning line? Replace unit.
Primary-scanning line warp? Replace unit. (Reflection mirror)
Primary-scanning line warp? Replace unit.