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Brother DCP-L8400DN Service Manual

Brother DCP-L8400DN
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2-116
Confidential
4.6 Troubleshooting for Control Panel Problems
4.6.1 Nothing is displayed on the LCD
< User Check >
- Turn the power OFF/ON.
Step Cause Remedy
1 The version of the panel
firmware and the main
firmware do not match.
Install the latest panel firmware and main
firmware.
2 Connection failure of the key
PCB flat cable
Reconnect the key PCB flat cable.
3 Connection failure of the
panel PCB harness
Reconnect the panel PCB harness.
4 Connection failure of the LCD
flat cable
Reconnect the LCD flat cable.
5 Connection failure of the
low-voltage power supply
PCB harness
Reconnect the low-voltage power supply
PCB harness.
6 AC cord failure Replace the AC cord.
7 Panel PCB failure Replace the panel PCB unit.
8 LCD failure Replace the LCD.
9 Key PCB failure Replace the panel cover ASSY.
10 Low-voltage power supply
PCB failure
Replace the low-voltage power supply PCB
unit.
11 Main PCB failure Replace the main PCB ASSY.

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Brother DCP-L8400DN Specifications

General IconGeneral
BrandBrother
ModelDCP-L8400DN
CategoryAll in One Printer
LanguageEnglish

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