Brother HL-5590DN

iii
Confidential
9. DISASSEMBLY PROCEDURE ................................................................................................. 3-38
9.1 Preparation ...................................................................................................................... 3-38
9.2 Paper tray ........................................................................................................................ 3-39
9.3 Back cover / Outer chute ................................................................................................. 3-41
9.4 Fuser cover ..................................................................................................................... 3-42
9.5 Fuser unit ........................................................................................................................ 3-43
9.6 MP cover ASSY .............................................................................................................. 3-46
9.7 Front cover ASSY ........................................................................................................... 3-48
9.8 Side cover L .................................................................................................................... 3-49
9.9 Side cover R .................................................................................................................... 3-50
9.10 Top cover ASSY .............................................................................................................. 3-51
9.10.1 Panel PCB ASSY ................................................................................................ 3-51
9.10.2 Top cover ASSY ................................................................................................. 3-52
9.10.3 NFC PCB ASSY .................................................................................................. 3-53
9.10.4 Control panel ....................................................................................................... 3-54
9.10.5 Stack sensor PCB ASSY .................................................................................... 3-58
9.10.6 Top cover printed ASSY ..................................................................................... 3-59
9.10.7 Top cover ASSY ................................................................................................. 3-60
9.10.8 Panel PCB ASSY ................................................................................................ 3-61
9.10.9 Top cover printed ASSY ..................................................................................... 3-62
9.11 Main PCB ASSY / Wireless LAN PCB (Wireless LAN models only) ............................... 3-63
9.12 External temperature/humidity sensor ............................................................................ 3-66
9.13 Laser unit ........................................................................................................................ 3-67
9.14 PF roller holder ASSY ..................................................................................................... 3-69
9.15 Low-voltage power supply PCB ASSY ............................................................................ 3-70
9.16 Toner amount detection sensor PCB ASSY (light emission) .......................................... 3-73
9.17 Main fan .......................................................................................................................... 3-75
9.18 Filter ................................................................................................................................ 3-77
9.19 Relay front PCB ASSY .................................................................................................... 3-78
9.20 Registration clutch / T1 pickup clutch .............................................................................. 3-79
9.21 Main frame L ASSY ......................................................................................................... 3-80
9.22 Paper feed motor ............................................................................................................ 3-83
9.23 Develop joint gear 37 / Develop joint .............................................................................. 3-85
9.24 Toner amount detection sensor PC
B ASSY (light reception) .......................................... 3-86
9.25 MP solenoid .................................................................................................................... 3-87
9.26 Develop clutch 51R ......................................................................................................... 3-88
9.27 Internal temperature sensor ............................................................................................ 3-89
9.28 Fuser drive gear 39 ......................................................................................................... 3-90
9.29 MX connector ASSY (Touch panel models only) ............................................................ 3-92
9.30 Eject motor ...................................................................................................................... 3-93
9.31 Back cover/duplex tray sensor ........................................................................................ 3-94
9.32 LT/TT connector .............................................................................................................. 3-95