Brother HL-2250DN - Page 5

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Confidential
4.7 Laser Unit Problems ......................................................................................................... 2-44
4.7.1 Laser Unit failure .................................................................................................. 2-44
4.8 PCB Problems .................................................................................................................. 2-45
4.8.1 Main PCB failure .................................................................................................. 2-45
4.8.2 Memory full ........................................................................................................... 2-45
4.8.3 Print overrun ......................................................................................................... 2-45
4.8.4 High voltage power supply PCB ASSY failure ..................................................... 2-45
4.8.5 Low voltage power supply PCB ASSY failure ...................................................... 2-46
4.9 Other Problems ................................................................................................................. 2-46
4.9.1 The printer is not turned on, or the LED indication does not appear. ................... 2-46
4.9.2 Fuser fan does not rotate. .................................................................................... 2-46
4.9.3 Main motor failure ................................................................................................. 2-47
4.9.4 Front cover open .................................................................................................. 2-47
4.9.5 Back cover open ................................................................................................... 2-47
CHAPTER 3 DISASSEMBLY AND ASSEMBLY ................................................ 3-1
1. SAFETY PRECAUTIONS ............................................................................................................ 3-1
2. PACKING .................................................................................................................................... 3-2
3. SCREW CATALOGUE ................................................................................................................ 3-3
4. SCREW TORQUE LIST .............................................................................................................. 3-4
5. LUBRICATION ............................................................................................................................ 3-5
6. OVERVIEW OF GEARS .............................................................................................................. 3-6
7. HARNESS ROUTING .................................................................................................................. 3-9
8. DISASSEMBLY FLOW ............................................................................................................. 3-17
9. DISASSEMBLY PROCEDURE ................................................................................................. 3-18
9.1 Paper Tray ........................................................................................................................ 3-19
9.2 Back Cover ....................................................................................................................... 3-22
9.3 Outer Chute ASSY ............................................................................................................ 3-24
9.4 Fuser Cover ...................................................................................................................... 3-25
9.5 Inner Chute ASSY, Eject Pinch Roller R ASSY and Eject Pinch Roller L ASSY .............. 3-26
9.6 Front Cover ASSY, Support Flap 1 ................................................................................... 3-28
9.7 Side Cover L ..................................................................................................................... 3-29
9.8 Side Cover R .................................................................................................................... 3-30
9.9 Top Cover ASSY .............................................................................................................. 3-31
9.10 Fuser Unit ......................................................................................................................... 3-35
9.11 Low voltage power supply PCB ASSY ............................................................................. 3-38
9.12 Fuser fan .......................................................................................................................... 3-41
9.13 High voltage power supply PCB ASSY ............................................................................. 3-42
9.14 Panel PCB ASSY .............................................................................................................. 3-43
9.15 Filter .................................................................................................................................. 3-44