Troubleshooting For Network Problems; Cannot Print Via Network Connection; Cannot Connect To Access Point; Troubleshooting For Control Panel Problems - Brother DCP-L5500D 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
Connection failure of the panel flat
1
cable
Connection failure of the low-voltage
2
power supply harness
3 AC cord failure
LCD relay PCB failure
4
(For 3.7 inch models only)
5 Panel flat cable failure
6 LCD failure
7 Panel PCB failure
Low-voltage power supply PCB
8
failure
9 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
Reconnect the panel flat cable.
Reconnect the low-voltage power supply
harness.
Replace the AC cord.
Replace the LCD relay PCB ASSY.
(For 3.7 inch models only)
Replace the panel flat cable.
Replace the LCD.
Replace the LCD panel ASSY.
Replace the low-voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
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Remedy
Remedy
Remedy
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