![background image](http://html.mh-extra.com/html/brother/hl-4140cn/hl-4140cn_service-manual_17203307.webp)
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:
Summary of Contents for HL-4140CN
Page 19: ...Confidential CHAPTER 1 SPECIFICATIONS ...
Page 29: ...Confidential CHAPTER 2 ERROR INDICATION AND TROUBLESHOOTING ...
Page 145: ...Confidential CHAPTER 3 DISASSEMBLY AND ASSEMBLY ...
Page 169: ...3 21 Confidential 8 DISASSEMBLY FLOW Disassembly Re Assembly second ...
Page 296: ...Confidential CHAPTER 4 ADJUSTMENTS AND UPDATING OF SETTINGS REQUIRED AFTER PARTS REPLACEMENT ...
Page 311: ...Confidential CHAPTER 5 SERVICE FUNCTIONS ...
Page 336: ...5 23 Confidential Inter color position alignment adjustment chart Fig 5 8 ...
Page 343: ...5 30 Confidential Fig 5 11 ...
Page 345: ...5 32 Confidential Fig 5 12 First side Second side ...
Page 347: ...5 34 Confidential Color test pattern Fig 5 13 MCYK Y C K M YCMK_ _A ...
Page 354: ...5 41 Confidential Maintenance information Fig 5 14 ...
Page 382: ...Confidential CHAPTER 6 CIRCUIT DIAGRAMS WIRING DIAGRAM ...
Page 384: ...6 1 Confidential 1 CIRCUIT DIAGRAMS High voltage Power Supply PCB Circuit Diagram 1 3 ...
Page 385: ...6 2 Confidential High voltage Power Supply PCB Circuit Diagram 2 3 ...
Page 386: ...6 3 Confidential High voltage Power Supply PCB Circuit Diagram 3 3 ...
Page 387: ...6 4 Confidential Low voltage Power Supply PCB Circuit Diagram 100V ...
Page 388: ...6 5 Confidential Low voltage Power Supply PCB Circuit Diagram 200V ...
Page 389: ...6 6 Confidential 2 WIRING DIAGRAM Wiring Diagram ...
Page 390: ...Confidential CHAPTER 7 PERIODICAL MAINTENANCE ...
Page 424: ...Confidential APPENDIX 1 SERIAL NUMBERING SYSTEM ...
Page 428: ...Confidential APPENDIX 3 INSTALLING THE MAINTENANCE DRIVER ...
Page 432: ...App 3 4 Confidential 10 Alert warning message appears click Continue Anyway to proceed ...