Service Mode, Troubleshooting For Brother DCP-B7535DW
Used for the following models DCP-B7500D, DCP-B7520DW, DCP-B7530DN, DCP-B7535DW, DCP-L2510D, [...]
Used for the following models
DCP-B7500D, DCP-B7520DW, DCP-B7530DN, DCP-B7535DW, DCP-L2510D, DCP-L2511D, DCP-L2512D, DCP-L2530DW, DCP-L2531DW, DCP-L2532DW, DCP-L2535D, DCP-L2535DW, DCP-L2536D, DCP-L2537DW, DCP-L2550DN, DCP-L2550DW, DCP-L2551DN, DCP-L2551DW, DCP-L2552DN, DCP7090, DCP7095D, DCP7190DN, DCP7195DW, HL-L2390DW, HL-L2395DW, MFC-B7700D, MFC-B7715DW, MFC-B7720DN, MFC-L2690DW, MFC-L2710DN, MFC-L2710DW, MFC-L2712DN, MFC-L2712DW, MFC-L2713DW, MFC-L2715D, MFC-L2715DW, MFC-L2716D, MFC-L2716DW, MFC-L2717DW, MFC-L2730DW, MFC-L2732DW, MFC-L2750DW, MFC-L2750DWXL, MFC-L2751DW, MFC-L2752DW, MFC-L2770DW, MFC-L2771DW, MFC7390, MFC7490D, MFC7890DN, MFC7895DW.
Troubleshooting. Image defect 1
Light
User Check
- Check the usage environment of the machine. Using the machine in hot-humid or cold-dry conditions can cause this problem.
- If the whole page is light, toner save mode may be ON. Turn OFF the toner save mode.
- Replace the drum unit with a new one.
- Replace the toner cartridge with a new one.
- Turn ON the power switch, and leave the machine for a while (condensation).
- Check if paper is not damp.
- Use specified paper.
| Step | Cause | Remedy |
|---|---|---|
| 1 | Dirt on the electrodes of the drum unit and those of the machine | Clean the electrodes of the drum unit and those of the machine. |
| 2 | Dirt on the electrodes of the toner cartridge and those of the machine | Clean the electrodes of the toner cartridge, process unit and those of the machine. |
| 3 | Dirt on the electrodes of the high-voltage power supply PCB and those of the machine | Clean the electrodes of the high-voltage power supply PCB and those of the machine. |
| 4 | Fuser unit failure | Replace the fuser unit. |
| 5 | High-voltage power supply PCB failure | Replace the high-voltage power supply PCB ASSY. |
| 6 | Main PCB failure | Replace the main PCB ASSY. |
Faulty registration
User Check
- Check whether appropriate paper type is selected on the driver.
- Install the latest main firmware.
| Step | Cause | Remedy |
|---|---|---|
| 1 | Registration rear actuator coming off | Reattach the registration rear actuator. |
| 2 | Laser unit failure | Replace the laser unit. |
| 3 | Main PCB failure | Replace the main PCB ASSY. |
Dark
User Check
- Check the usage environment of the machine. Using the machine in hot-humid or cold-dry conditions can cause this problem.
- If a new toner cartridge has been detected, check that it was not replaced with another toner cartridge.
- Execute density adjustment from the control panel.
- Clean the corona wire of the drum unit.
- Replace the drum unit with a new one.
- Replace the toner cartridge with a new one
| Step | Cause | Remedy |
|---|---|---|
| 1 | Dirt on the electrodes of the drum unit and those of the machine | Clean the electrodes of the drum unit and those of the machine. |
| 2 | Wrong adjusted value of the laser unit entered | Refer to “Entering Adjusted Value of Laser Unit” in Chapter 4, and enter the adjusted value of the laser unit correctly. |
| 3 | Dirt on the electrodes of the high-voltage power supply PCB | Clean the electrodes of the high-voltage power supply PCB. |
| 4 | Fuser unit failure | Replace the fuser unit. |
| 5 | High-voltage power supply PCB failure | Replace the high-voltage power supply PCB ASSY. |
| 6 | Laser unit failure | Replace the laser unit. |
| 7 | Main PCB failure | Replace the main PCB ASSY. |
Poor fixing
User Check
- Check the usage environment of the machine. Using the machine in hot-humid or cold-dry conditions can cause this problem.
- Clean the corona wire of the drum unit.
- Replace the drum unit with a new one.
- Replace the toner cartridge with a new one.
| Step | Cause | Remedy |
|---|---|---|
| 1 | Dirt on the electrodes of the drum unit and those of the machine | Clean the electrodes of the drum unit and those of the machine. (Refer to Fig. 2-12 (P2- 56) and Fig. 2-13 (P2-56).) |
| 2 | Dirt on the electrodes of the toner cartridge and those of the machine | Clean the electrodes of the toner cartridge and those of the machine. (Refer to Fig. 2-12 (P2-56) and Fig. 2-16 (P2-84).) |
| 3 | Fuser unit failure | Replace the fuser unit. |
| 4 | High-voltage power supply PCB failure | Replace the high-voltage power supply PCB ASSY. |
| 5 | Low-voltage power supply PCB failure | Replace the low-voltage power supply PCB ASSY. |
| 6 | Laser unit failure | Replace the laser unit. |
| 7 | Main PCB failure | Replace the main PCB ASSY. |
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