T RO U B L E S H O OT I N G
7.1.3 Horizontal Black Band
• Description
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
1.Dark or blurry horizontal stripes occur in the printing periodically. (They may not occur periodically.)
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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7.1.4 Black/White Spot
• Description
Digital Printer
Digital Printer
Digital Printer 
Digital Printer
Digital Printer
1.Dark or blurry black spots occur periodically in the printing.
2.White spots occur periodically in the printing.
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
Samsung Electronics
