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Troubleshooting
Fault | Signs | Cause & Check | Solution |
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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 | |
| occur periodically. | developer rollers are contami - | ||
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| nated with foreign substance | Especially check foreign sub - | |
| • White spots occur | or paper particles. | stance on the OPC surface, then | |
| in the image period- | (1) 37.7 mm interval : Charged | remove them with a clean gauze | |
| ically. | roller | moistened with IP | A(Isopropyl |
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| (2) 75.5 mm 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 75mm, or |
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| If they are not disappeared by | ||
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| black spots occur elsewhere, | ||
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| running OPC Cleaning Mode | ||
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| the OPC drum is damaged or | ||
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| Print |
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| foreign substance is stuck to |
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| : at intervals of 37.7 mm - | ||
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| the surface. | ||
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| Replace the developer. | ||
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| : at intervals of 75.5 mm - | |
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| Remove foreign substance. | |
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| : Broken image - |
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| Replace the developer accord - | |
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| ing to carelessness. | |
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| 3. If a black and white or graphic | 3. In case of 3 - |
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| image is partially broken at | Exchange the transfer roller | |
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| irregular intervals, the transfer | because the life of | the transfer |
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| roller's life has been expired or | roller in use has been expired. | |
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| the transfer voltage is abnor - | (Check the transfer voltage and | |
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| mal. | readjust if different.) |
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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. | |
| • Unclean and rough | and whether different mate- | (2)If materials other than normal | |
| printouts. | rials are used. | parts of the developer are | |
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| (2) Check the appearance of | added or substituted. | |
| • 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 - |
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| (1) Check whether foreign sub - | If there are any abnormals in | |
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| stance or toner are stuck to | connection with the situation of 1. | |
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| the terminal (contact point) | (1) It occurs when the developer | |
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| of 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 | are collected to use, it is | |
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| normal. | judged as the recycled devel- | |
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| oper. |
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