Brother HL-L9300CDW - 4.6.2 Unable to perform panel operation

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Confidential
4.6.2 Unable to perform panel operation
< User Check >
- Turn the power OFF/ON.
Step Cause Remedy
1 The version of the panel
firmware and the main
firmware do not match.
(Model with touch panel)
Install the latest panel firmware and main
firmware.
2 Deviated adjustment of touch
panel
(Model with touch panel)
Refer to “1.3.14 Adjustment of touch panel
(Function code 61) (Model with touch panel
only)” in Chapter 5 and perform adjustments.
3 Connection failure of the key
PCB flat cable
(Model with touch panel)
Reconnect the key PCB flat cable.
4 Connection failure of the
panel PCB harness
(Model without touch panel)
Reconnect the panel PCB harness.
5 Rubber key installation failure
(Model without touch panel)
Re-assemble the rubber key.
6 Connection failure of the
low-voltage power supply
PCB harness
Reconnect the low-voltage power supply
PCB harness.
7 Key PCB flat cable failure
(Model with touch panel)
Replace the key PCB flat cable.
8 Panel control PCB failure
(Model with touch panel)
Replace the panel control PCB ASSY.
9 LCD unit failure
(Model with touch panel)
Replace the LCD panel ASSY.
10 Key PCB failure
(Model with touch panel)
Replace the panel case ASSY.
11 Panel PCB failure
(Model without touch panel)
Replace the panel PCB ASSY.
12 Low-voltage power supply
PCB failure
Replace the low-voltage power supply PCB
unit.
13 Main PCB failure Replace the main PCB ASSY.