Kyocera FS-1050 Service Manual - Page 140

Dropouts

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(3) Dropouts ABC 123 Note the spacing of the defects. Refer to Repetitive defects gauge (See page 6-26). • If the defects occur at regular intervals of 63 mm, the problem may be the damaged developing roller (in the process unit). Replace the process unit. •If the defects occur at regular intervals of 94 mm, the problem may be the damaged drum (in the process unit). Replace the process unit. •If the defects occur at regular intervals of 61 mm, the problem may be the damaged fuser unit. Replace the press roller or heat roller (See page 5-27 or 5-13). Check paper for property. • Paper with rugged surface or dump tends to cause dropouts. Replace paper with the one that satisfies the paper specifications. Check the transfer roller installation. • The transfer roller must be supported by the bushes at the both ends. Clean the bush to remove oil and debris. Replace the transfer roller if necessary (See page 5-9). Check the transfer bias potential. • Check the transfer bias output on the high voltage board. This requires removal of the left cover and the test equipment. Replace the high voltage board if high voltage potential is not available on the board (See page 5-9). FS-1050 6-20

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6-20
FS-1050
(3) Dropouts
Note the spacing of the defects. Refer to
Repetitive defects gauge
(See page 6-26).
• If the defects occur at regular intervals of 63 mm, the problem may be the damaged developing
roller (in the process unit). Replace the process unit.
•If the defects occur at regular intervals of 94 mm, the problem may be the damaged drum
(in the
process unit). Replace the process unit.
•If the defects occur at regular intervals of 61 mm, the problem may be the damaged fuser unit.
Replace the press roller or heat roller (See page 5-27 or 5-13).
Check paper for property.
• Paper with rugged surface or dump tends to cause dropouts. Replace paper with the one that
satisfies the paper specifications.
Check the transfer roller installation.
• The transfer roller must be supported by the bushes at the both ends. Clean the bush to remove oil
and debris. Replace the transfer roller if necessary (See page 5-9).
Check the transfer bias potential.
• Check the transfer bias output on the high voltage board. This requires removal of the left cover
and the test equipment. Replace the high voltage board if high voltage potential is not available on
the board (See page 5-9).
ABC
123