Image defect related problems are end user recoverable if following the User Check items. If the same problem occurs, follow each procedure in the order of the number described in the Step column in the tables below.
■LightUser Check
•Check the machine's environment. High temperature and high humidity conditions can cause this problem.
•If the whole page is light, toner save mode may be on.
•Replace the toner cartridge or drum unit with a new one.
Step | Cause | Check | Result | Remedy | |
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| Dirt on exposure | Are the electrodes of the |
| Clean both electrodes. | |
1 | drum electrode | drum unit and machine | Yes |
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| body dirty? |
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| Dirt on scanner | Is the scanner windows |
| Wipe the dirt off with a soft, | |
2 | windows of the | of the laser unit dirty? | Yes | clean, lint free cloth. | |
| laser unit |
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| Toner sensor | After replacing the toner |
| Replace the toner | |
| failure | cartridge with a new |
| cartridge. | |
3 |
| one, does the same | No |
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| problem occur even |
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| after printing several |
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| pages? |
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| Does the machine start |
| Clean the toner sensor. | |
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| printing even after |
| (receiving light side) | |
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| removing the toner |
| Check the harness | |
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| cartridge from the drum |
| connection of the toner | |
4 |
| unit? | Yes | LED PCB ASSY. | |
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| (luminescence side) | |
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| Replace the toner sensor | |
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| PCB ASSY or toner LED | |
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| PCB ASSY. | |
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| Between the | Is the harness of the |
| Reconnect the harness of | |
5 | HVPS PCB/Main | HVPS PCB ASSY and | Yes | the HVPS PCB ASSY and | |
PCB connection | main PCB ASSY | main PCB ASSY. | |||
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| failure | connected correctly? |
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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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| Laser unit failure | Is the problem solved |
| Replace the laser unit. | |
8 |
| after replacing the laser | Yes |
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| unit? |
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Confidential |