User Check
• Clean the inside of the machine and the corona wire in the drum unit.
• Replace the drum unit with a new one.
Step | Cause | Check | Result | Remedy | |
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| Dirt on the | Are the electrodes on |
| Clean both electrodes | |
1 | charged | the drum unit and | Yes |
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| electrode | machine body dirty? |
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| Paper tray | Is the paper tray ground |
| Correct bending of paper | |
| ground terminal | terminal bent, which is |
| tray ground terminal. | |
2 | provided in the | provided in the machine | Yes |
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| machine body | body? |
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| Toner attached | Are the horizontal stripes |
| This problem will disappear by | |
3 | on the develop | at 41.0 mm (develop | Yes | printing approximate 10 pages. | |
roller | roller circumference) | If the same problem occurs, | |||
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| intervals? |
| replace the toner cartridge. | |
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| Scratch and Dirt | Are the horizontal stripes |
| Replace the drum unit. | |
4 | on the exposure | at 75.0 mm (exposure | Yes |
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drum | drum circumference) |
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| intervals? |
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| Scratch and Dirt | Are the horizontal stripes |
| Replace the fuser unit. | |
5 | on the heat roller | at 78.5 mm (heat roller | Yes |
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| circumference) intervals? |
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| HVPS PCB | Is the problem solved |
| Replace the HVPS PCB | |
6 | failure | after replacing the | Yes | ASSY. | |
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| HVPS PCB ASSY? |
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| Main PCB failure | Is the problem solved |
| Replace the main PCB | |
7 |
| after replacing the main | Yes | ASSY. | |
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| PCB ASSY? |
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Bottom surface of Paper tray
Paper tray ground terminal.
Fig.
Confidential |