2-105
Confidential
■
White spots on one color image
<User Check>
- Check if the fuser fan and low-voltage power supply PCB fan are not blocked.
- Toner may be empty. Replace the toner cartridge with a new one.
- Refer to the User’s guide and remove the dirt on the exposure drum using a cotton swab.
- The drum unit may be damaged. Replace the drum unit with a new one.
- The belt unit may be damaged. Replace the belt unit with a new one.
■
Pinch roller cleaning procedure
Pull out both sides of the pinch roller cover from the ribs to remove the pinch roller cover.
Clean the pinch roller with a brush as rotating the pinch roller in the arrow direction with
your fingers.
Remove paper dust accumulated in the paper tray by turning over the paper tray.
Fig. 2-14
Step
Cause
Remedy
1
Dirt on the pinch roller of the
paper tray
Refer to the figure below and clean the pinch
roller.
2
Exposure drum dirty
Refer to
"2.8 Drum Cleaning" in Chapter 5
and perform drum cleaning.
3
High-voltage power supply
PCB failure
Replace the high-voltage power supply PCB
ASSY.
4
Toner/New sensor PCB
failure
Replace the Toner/New sensor PCB ASSY.
Pinch roller cover
Paper dust
Rib
Rib
Paper tray
Pinch roller
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 ...