Brother HL-4140CN - If You Replace the Low-Voltage Power Supply Pcb Assy; Reset of Irregular Power Supply Detection Counter

4-9
Confidential
5. IF YOU REPLACE THE LOW-VOLTAGE
POWER SUPPLY PCB ASSY
5.1 Reset of Irregular Power Supply Detection Counter
The irregular power supply detection counter is counted up when the printer detects irregular
power supply. If the counter reaches to the limit, the printer shows the service error to replace
the low-voltage power supply PCB because it might be damaged by recursive irregular power
supply. In this case, if the same power supply is used, the same error might occur again even
if the low-voltage power supply PCB ASSY is replaced. For this reason, be sure to ask the
user to rearrange the installation environment.
(1) Press the OK button and then the Go button while the printer is in the ready state. Next,
press the button four times to enter the maintenance mode.
The printer displays on the LCD.
(2) Connect the PC to the printer with the USB cable.
(3) Start the “FILEDG32.EXE” and select the “Brother Maintenance USB Printer”.
(4) Click the “Brother Maintenance USB Printer” icon to select. Drag the SQWAVE.PJL and
drop it.
Note:
The maintenance driver must have been installed. (Refer to APPENDIX 3.)