Chapter 6 Troubleshooting - Brother HL-8050N Service Manual

CHAPTER 6 TROUBLESHOOTING ....................................................... 6-1

1. PRPGRESSING WITH THE TROUBLESHOOTING .................................................6-1
1.1 Flow of Troubleshooting................................................................................................... 6-1
1.2 Preparatory Requirements............................................................................................... 6-2
1.3 Cautions for Service Operations...................................................................................... 6-3
1.4 Cautions for FIP Use........................................................................................................ 6-4
2. LEVEL 1 FIP..............................................................................................................6-5
2.1 Level 1 FIP ....................................................................................................................... 6-5
2.2 Flow of Level 1 FIP .......................................................................................................... 6-5
2.3 Error/Status Code List...................................................................................................... 6-6
3. LEVEL 2 FIP..............................................................................................................6-9
3.1 Level 2 FIP ....................................................................................................................... 6-9
4. ERROR CODE FIP..................................................................................................6-10
4.1 Level 1 FIP ..................................................................................................................... 6-10
4.2 Level 2 FIP ..................................................................................................................... 6-28
5. IMAGE QUALITY TROUBLE...................................................................................6-44
5.1 Entry Chart Image Quality Troubleshooting................................................................... 6-44
5.2 Image Quality FIP .......................................................................................................... 6-46
6. JUDGEMENT OF PRINT CONSISTENCY..............................................................6-65
7. PREVENTIVE MAIN MAINTENANCE.....................................................................6-70
CHAPTER 7 SERVICE MODE ................................................................ 7-1
1. ENTERING HIDDEN FUNCTION MENU MODES ....................................................7-1
2. PROFESSIONAL MENU MODE ...............................................................................7-2
2.1 Enabling and Disabling Professional Menu Mode ........................................................... 7-2
2.2 Function Table ................................................................................................................. 7-3
3. SERVICE MENU MODE............................................................................................7-8
3.1 Entering the Service Menu Mode .................................................................................... 7-8
3.2 Function Table ................................................................................................................. 7-8
4. OTHER HIDDEN FUNCTION MENUS....................................................................7-11
4.1 Hidden Function Menus Enabled by Pressing Switch (es) When Turning the Machine on .
....................................................................................................................................... 7-11
4.2 Parts life Reset Function................................................................................................ 7-11
5. HOW TO USE THE SELF-DIAGNOSTICS TOOLS ................................................7-12
5.1 Troubleshooting for Printer won't print........................................................................... 7-12
5.2 Diagnostics..................................................................................................................... 7-13
5.3 Printer Information ......................................................................................................... 7-15
6. HOW TO REWRITE HL-8050N FLASH ROM .........................................................7-16
7. NVRAM BACKUP ....................................................................................................7-17
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HL-8050N SERVICE MANUAL