TROUBLESHOOTING
4.2.3 Horizontal Black Band
1. Dark or blurry horizontal stripes occur in the printing periodically.
• Description
(They may not occur periodically.)
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Check and Cause |
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1. Bad contacts of the voltage terminals to | 1. | Clean each voltage terminal of the Charge, | ||
developer. |
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| Supply, Develop and Transfer roller. |
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| (remove the toner particles and paper par- |
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| ticles) |
2. The rollers of developer may be stained. | 2. | Clean the right Gear that has relatively | ||
Charge roller | = | 37.7mm |
| small gap of the teeth in the OPC. |
Supply roller | = | 37mm |
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Develop roller = | 35.3mm |
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Transfer roller | = | 45.3mm |
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| 3. | If the malfunction persists, replace the |
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| developer. |
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4.2.4Black/White Spot
1.Dark or blurry black spots occur periodically in the printing.
• Description
2.White spots occur periodically in the printing.
Digital Printer
Digital Printer
Digital Printer 
Digital Printer
Digital Printer
Check and Cause | Solution |
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1. If dark or blurry black spots occur periodi- | 1. Run OPC cleaning Mode Print and run the |
cally, the rollers in the Developer may be | |
contaminated with foreign matte or paper |
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particles. |
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( Charge roller : 37.7 mm interval |
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OPC drum : 75.5 mm interval) |
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2. If faded areas or voids occur in a black | 2. In case of 75.5 mm interval unremovable in |
image at intervals of 75.5 mm, or black | 1, cleanly remove foreign substances stuck |
spots occur elsewhere, the OPC drum | on the OPC location equivalent to black |
surface is damaged. | spots and white spots with a dry duster. |
3. If a black image is partially broken, the | 3. The transfer roller guarantees 60.000 |
transfer voltage is abnormal or the trans- | sheets printing. If the roller's life is expired, |
fer roller's life has expired. | replace it. |
| 4. In case of 37.7 mm interval unremovable in |
| 1, take measures as to replace the develop- |
| er cartridge and try to print out. |
| 5. Clean the inside of the set against the paper |
| particles and foreign matter in order not to |
| cause the trouble. |
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Service Manual