Troubleshooting For Network Problems; Cannot Print Via Network Connection; Cannot Connect To Access Point; Troubleshooting For Control Panel Problems - Brother HL-L5000D Service Manual

4.5 Troubleshooting for Network Problems

4.5.1 Cannot print via network connection

<User Check>
- Check the relevant section in the Network Setting Guide.
- Check the network connection.
- Reset the network. (Refer to the online User's Guide.)
- Check the LAN cable.
Step
1 Wireless LAN PCB failure
Deformed LAN terminal pin
2
Main PCB failure

4.5.2 Cannot connect to access point

<User Check>
- Check the wireless LAN settings.
- Check the access point settings.
- Change the machine installation location.
- Set the access point manually.
Step
1 Wireless LAN PCB failure
2 Main PCB failure

4.6 Troubleshooting for Control Panel Problems

4.6.1 Nothing is displayed on the LCD

<User Check>
- Turn the power switch OFF and then ON again.
Step
Rubber key attachment failure (Non
1
touch panel models only)
Connection failure of the panel PCB flat
2
cable (Non touch panel models only)
Connection failure of the low-voltage
3
power supply harness
4 AC cord failure
5 LCD relay PCB failure
Panel PCB failure (Non touch panel
6
models only)
LCD failure (Non touch panel
7
models only)
Panel PCB failure (Touch panel
8
models only)
Low-voltage power supply PCB
9
failure
10 Main PCB failure
Cause
Replace the wireless LAN PCB.
Replace the main PCB ASSY.
Cause
Replace the wireless LAN PCB.
Replace the main PCB ASSY.
Cause
Reattach the rubber key.
Reconnect the panel PCB flat cable.
Reconnect the low-voltage power supply
harness.
Replace the AC cord.
Replace the LCD relay PCB ASSY.
Replace the panel PCB ASSY.
Replace the LCD.
Replace the LCD panel ASSY.
Replace the low-voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
2-112
Remedy
Remedy
Remedy
Confidential