HL-1850/1870N SERVICE MANUAL
1-9
Caliper
0.08 to 0.13 mm (0.003 to 0.005 in.)
Moisture content
4% to 6% by weight
<Multi-purpose tray>
Cut sheet
Envelope
Basis weight
60 to 161 g/m
2
(16 to 43 lb.)
75 to 90 g/m
2
(20 to 24 lb.)
single thickness
Caliper
0.08 to 0.2 mm (0.003 to 0.008 in.) 0.084 to 0.14 mm (0.003 to 0.005 in.)
single thickness
Moisture
content
4% to 6% by weight
4% to 6% by weight
(4) Recommended paper
Europe
USA
Plain paper
Xerox Premier 80 g/m
2
Xerox Business 80 g/m
2
IGEPA X-Press 80 g/m
2
Xerox 4200DP 20 lb
Champion Paper One 20 lb
Hammermill Laser Paper 24 lb
Recycled paper
Steinbis Recycling Copy 80 g/m
2
Transparency
3M CG3300
3M CG 3300
Label
Avery laser label L7163
Avery laser label #5160
!
CAUTION:
When you are choosing print media, be sure to follow the information given below to prevent
any paper jams, print quality problems or printer damage;
•
It is recommended to use long-grained paper for the best print quality. If short-grained
paper is being used, it might be the cause of paper jams.
•
Use neutral paper. Do not use acid paper to avoid any damage to the drum unit.
•
Avoid using coated paper such as vinyl coated paper.
•
Avoid using preprinted or highly textured paper.
•
It is recommended to use labels or transparencies which are designed for use in laser
printers.
•
Avoid feeding labels with the carrier sheet exposed, or the printer will be damaged.
•
Before loading paper with holes such as organizer sheets, be sure to fan the stack well.
•
Do not use organizer sheets that are stuck together. The glue that is used might caused
damaged to the printer.
•
When printing on the back of pre-printed paper, if the paper is curled, be sure to straighten
the paper as much as possible.
•
Different types of paper should not be loaded at the same time in the paper cassette to
avoid any paper jams or misfeeds.
Summary of Contents for HL-1870N
Page 15: ...HL 1850 1870N SERVICE MANUAL xiii ...
Page 77: ...CHAPTER 2 INSTALLATION AND BASIC OPERATION 2 48 ...
Page 82: ...HL 1850 1870N SERVICE MANUAL 3 5 Fig 3 5 ...
Page 91: ...CHAPTER 3 THEORY OF OPERATION 3 14 Fig 3 15 ...
Page 101: ...CHAPTER 3 THEORY OF OPERATION 3 24 ...
Page 109: ...CHAPTER 4 DISASSEMBLY AND RE ASSEMBLY 4 2 ...
Page 131: ...CHAPTER 4 DISASSEMBLY AND RE ASSEMBLY 4 24 Fig 4 39 ...
Page 141: ...CHAPTER 4 DISASSEMBLY AND RE ASSEMBLY 4 34 Never touch the surface of the heat roller ...
Page 148: ...CHAPTER 4 DISASSEMBLY AND RE ASSEMBLY 4 41 ...
Page 158: ...CHAPTER 4 DISASSEMBLY AND RE ASSEMBLY 4 51 Fig 4 80 ...
Page 160: ...CHAPTER 4 DISASSEMBLY AND RE ASSEMBLY 4 53 Fig 4 82 ...
Page 167: ...CHAPTER 4 DISASSEMBLY AND RE ASSEMBLY 4 60 Fig 4 91 ...
Page 169: ...CHAPTER 4 DISASSEMBLY AND RE ASSEMBLY 4 62 Fig 4 93 ...
Page 172: ...CHAPTER 4 DISASSEMBLY AND RE ASSEMBLY 4 65 Fig 4 97 ...
Page 174: ...CHAPTER 4 DISASSEMBLY AND RE ASSEMBLY 4 67 3 27 Harness Winding Form ...
Page 183: ...CHAPTER 5 PERIODIC MAINTENANCE 5 8 ...
Page 186: ...HL 1850 1870N SERVICE MANUAL 5 11 ...
Page 194: ...CHAPTER 6 TROUBLESHOOTING 6 8 error in this chapter ...
Page 202: ...CHAPTER 6 TROUBLESHOOTING 6 16 ...
Page 205: ...HL 1850 1870N SERVICE MANUAL 6 19 ...
Page 210: ...CHAPTER 6 TROUBLESHOOTING 6 24 ...
Page 237: ...HL 1850 1870N SERVICE MANUAL 6 51 No Refer and compare with I 15 ...
Page 255: ...HL 1850 1870N SERVICE MANUAL 6 69 ...
Page 261: ...CHAPTER 7 HIDDEN FUNCTIONS 7 6 DRAM CHECK START START DRAM TEST Tests DRAM data ...
Page 270: ...HL 1850 1870N SERVICE MANUAL 7 15 ...
Page 271: ......
Page 272: ...Appendix 1 Connection Diagram HL 1850 1870N A 1 ...
Page 273: ...Appendix 2 Main PCB Circuit Diagram HL 1850 1870N 1 6 CODE LJ8453001 B512078CIR 1 6 A 2 NAME ...
Page 274: ...Appendix 3 Main PCB Circuit Diagram HL 1850 1870N 2 6 CODE LJ8453001 B512078CIR 2 6 A 3 NAME ...
Page 275: ...Appendix 4 Main PCB Circuit Diagram HL 1850 1870N 3 6 CODE LJ8453001 B512078CIR 3 6 A 4 NAME ...
Page 276: ...Appendix 5 Main PCB Circuit Diagram HL 1850 1870N 4 6 CODE LJ8453001 B512078CIR 4 6 A 5 NAME ...
Page 277: ...Appendix 6 Main PCB Circuit Diagram HL 1850 1870N 5 6 CODE LJ8453001 B512078CIR 5 6 A 6 NAME ...
Page 278: ...Appendix 7 Main PCB Circuit Diagram HL 1850 1870N 6 6 CODE LJ8453001 B512078CIR 6 6 A 7 NAME ...
Page 284: ...Appendix 13 High voltage Power Supply PCB Circuit Diagram A 13 NAME High voltage PS Circuit ...
Page 303: ...APPENDIX A 32 ...