T RO U B L E S H O OT I N G
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| Fault | Signs | Cause & Check |
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| White Black spot | • Light or dark black | 1. If light or dark periodical black | 1. In case of 1 above - | ||||
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| dots on the image | dots occur, this is because the | Run OPC Cleaning Mode Print | ||
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| Digital Printer |
| occur periodically. | developer rollers are contami- | |||
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| nated with foreign substance | Especially check foreign sub- | |||
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| • White spots occur | or paper particles. | stance on the OPC surface, then | |||
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| Digital Printer |
| in the image period- | (1)37.7mm interval : Charged | remove them with a clean gauze | ||
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| Digital Printer |
| ically. | roller | moistened with IPA(Isopropyl | ||
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| Digital Printer |
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| (2)75.5mm interval : OPC cycle | Alcohol) not to damage OPC if | ||
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| necessary. |
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| 2. If white spots occur in a black | Never use usual alcohol. | ||
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| 2. In case of 2 |
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| image at intervals of 75.5mm, |
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| If they | are not | disappeared by | |
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| or black spots occur else- | |||
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| running | OPC | Cleaning Mode | |
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| where, the OPC drum is dam- | |||
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| Print |
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| aged or foreign substance is |
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| : at intervals of 37.7mm - Replace | |||
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| stuck to the surface. | |||
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| the developer. |
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| : at intervals of 75.5mm - Remove | ||
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| foreign substance. | ||
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| : Broken image - Replace the | ||
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| developer according to careless- | ||
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| ness. |
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| 3. If a black and white or graphic | 3. In case of 3 - Exchange the | ||
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| image is partially broken at | transfer roller because the life of | ||
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| irregular intervals, the transfer | the transfer roller in use has been | ||
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| roller's life has been expired or | expired. (Check the transfer volt- | ||
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| the transfer voltage is abnor- | age and readjust if different.) | ||
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| mal. |
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| Recycled product | • Poor appearance of | 1. Poor appearance of the devel- | 1. In case of 1 - |
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| the developer. | oper. | (1)If there is an evidence of disas- | ||
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| (1)Check the damage to label | sembling the developer. | ||
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| • Unclean and rough | and whether different materi- | (2)If materials other than normal | ||
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| printouts. | als are used. | parts of the developer are | ||
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| (2)Check the appearance of | added or substituted. | ||
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| • Bad background in | parts of the developer, such |
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| the image. | as frame, hopper. |
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| 2. Unclean and rough printouts. | 2. In case of 2 - If there are any | ||
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| (1)Check whether foreign sub- | abnormals in connection with the | ||
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| stance or toner are stuck to | situation of 1. |
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| the terminal (contact point) of | (1)It occurs when the developer | ||
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| the developer. | is recycled over 2 times. | ||
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| (2)Check whether the state of | (2)If toner nearly being expired | ||
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| the terminal assembly is nor- | are collected to use, it is | ||
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| mal. | judged as the recycled devel- | ||
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| oper. |
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Service Manual
Samsung Electronics
