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2A3/4
3-6-14
(19) Image is not square.
Causes
1. Laser scanner unit positioned incorrectly.
2. Image scanning unit positioned incorrectly.
Causes
Check procedures/corrective measures
1. Laser scanner unit positioned
incorrectly.
2. Image scanning unit positioned
incorrectly.
Adjust the installation position of the laser
scanner unit (see page 3-3-33).
Adjust the installation position of the image
scanning unit (see page 3-3-35).
(20) Image contrast is low
(carrier scattering).
Causes
1. No developing bias output.
Causes
Check procedures/corrective measures
1. No developing bias output.
A. Developing bias wire makes poor
contact.
B. Defective main PCB.
C. Defective high-voltage
transformer PCB.
Check the developing bias wire. If there are
any problems, replace it.
Check if CN1-85 on the main PCB goes low
when maintenance item U030 is run. If not,
replace the main PCB.
Check if developing bias is output when there
is no problem with the main PCB while
maintenance item U030 is run. If not, replace
the high-voltage transformer PCB.
Summary of Contents for Ri 4230
Page 3: ...SERVICE MANUAL Ri 4230 5230 ...
Page 13: ...4230 5230 S M MCA THEORY AND CONSTRUCTION SECTION I I Theory and Construction Section ...
Page 14: ...1 1 5 2A3 4 CONTENTS 1 1 Specifications 1 1 1 Specifications 1 1 1 ...
Page 100: ...4230 5230 S M MCA ELECTRICAL SECTION II II Electrical Section ...
Page 119: ......
Page 138: ......
Page 159: ...4230 5230 S M MCA III Set Up and Adjustment Section III SET UP AND ADJUSTMENT SECTION ...
Page 448: ...2A3 4 3 6 3 25 Toner scatters at the leading edge of the image See page 3 6 17 ...