User Check
• Replace the drum unit with a new one.
• Replace the toner cartridge with a new one.
Step | Cause | Check | Result | Remedy |
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| Fuser unit failure | Is the problem solved |
| Replace the fuser unit. |
1 |
| after replacing the fuser | Yes |
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| unit? |
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| Is the problem solved |
| Replace the PS PCB unit. | |
2 | power supply | after replacing the PS | Yes |
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| PCB failure | PCB unit? |
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| HVPS PCB | Is the problem solved |
| Replace the HVPS PCB |
3 | 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 |
4 |
| after replacing the main | Yes | ASSY. |
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| PCB ASSY? |
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User Check
•Replace the drum unit with a new one.
•Replace the toner cartridge with a new one.
Step | Cause | Check | Result | Remedy |
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| Developing bias | Are the electrodes on |
| Clean both electrodes. |
1 | voltage | the drum unit and | Yes |
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conduction | machine body dirty? |
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| failure |
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| Scanner harness | Is the scanner harness |
| Reconnect the scanner |
2 | of the laser unit | of the laser unit | No | harness of the laser unit. |
connection | connected securely? |
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| failure |
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| Laser unit failure | Is the problem solved |
| Replace the laser unit. |
3 |
| after replacing the laser | Yes |
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| unit? |
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| HVPS PCB | Is the problem solved |
| Replace the HVPS PCB |
4 | 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 |
5 |
| after replacing the main | Yes | ASSY. |
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| PCB ASSY? |
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Confidential |