HL-5130/5140/5150D/5170DN SERVICE MANUAL 
 
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PREFACE 
This service manual contains basic information required for after-sales service of the laser 
printer (hereinafter referred to as "this machine" or "the printer").  This information is vital to 
the service technician to maintain the high printing quality and performance of the printer. 
This service manual covers the HL-5130/5140/5150/5170N printers. 
This manual consists of the following chapters: 
CHAPTER 1:  GENERAL 
Features, specifications, etc.  
CHAPTER 2:  INSTALLATION AND BASIC OPERATION 
Installation conditions, Installation procedures, basic operation of the printer 
etc. 
CHAPTER 3:  THEORY OF OPERATION 
Basic operation of the mechanical system, the electrical system and the 
electrical circuits and their timing information. 
CHAPTER 4:  DISASSEMBLY AND RE-ASSEMBLY 
Procedures for disassembling and re-assembling the mechanical system. 
CHAPTER 5:  PERIODIC MAINTENANCE 
Periodical replacements parts, consumable parts, etc. 
CHAPTER 6:  TROUBLESHOOTING 
Reference values and adjustments, troubleshooting image defects, 
troubleshooting malfunctions, etc. 
CHAPTER 7:  SERVICE SUPPORT SOFTWARE 
Test print mode and Service menu mode, etc. 
APPENDICS:  PCB circuit diagrams, etc. 
 
Information in this manual is subject to change due to improvement or redesign of the product.  
All relevant information in such cases will be supplied in service information bulletins 
(Technical Information). 
A thorough understanding of this printer, based on information in this service manual and 
service information bulletins, is required for maintaining its print quality performance and for 
improving the practical ability to find the cause of problems.