Brother HL-L2340DW - Disassembly Procedure; Adjusting and Updating Settings; Replacing Main PCB; Replacing Low-Voltage Power Supply PCB

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Confidential
9. DISASSEMBLY PROCEDURE ................................................................................................. 3-14
9.1 Preparation ....................................................................................................................... 3-14
9.2 Back Cover ....................................................................................................................... 3-15
9.3 Outer Chute ASSY ............................................................................................................ 3-16
9.4 Front Cover ASSY ............................................................................................................ 3-17
9.5 Side Cover R .................................................................................................................... 3-18
9.6 Fuser Cover ...................................................................................................................... 3-19
9.7 Inner Chute ASSY ............................................................................................................ 3-20
9.8 Side Cover L ..................................................................................................................... 3-21
9.9 Top Cover ASSY .............................................................................................................. 3-22
9.10 Fuser Unit ......................................................................................................................... 3-25
9.11 Low-voltage Power Supply PCB ASSY ............................................................................ 3-27
9.12 Fan ................................................................................................................................... 3-29
9.13 High-voltage Power Supply PCB ASSY ........................................................................... 3-30
9.14 Filter .................................................................................................................................. 3-32
9.15 Laser Unit ......................................................................................................................... 3-33
9.16 Wireless LAN PCB (Wireless network model only) .......................................................... 3-35
9.17 Roller Holder ASSY .......................................................................................................... 3-36
9.18 Main PCB ASSY ............................................................................................................... 3-37
9.19 T1 Clutch and Registration Clutch .................................................................................... 3-38
9.20 New Toner Sensor PCB ASSY ......................................................................................... 3-39
9.21 Main Frame L ASSY ......................................................................................................... 3-40
9.22 Main Motor ........................................................................................................................ 3-42
9.23 Fuser Gear 67R/40R ........................................................................................................ 3-44
9.24 Eject Sensor PCB ASSY .................................................................................................. 3-45
9.25 Registration Front/rear Actuator Holder ASSY ................................................................. 3-47
CHAPTER 4 ADJUSTING AND UPDATING SETTINGS
AS REQUIRED AFTER PARTS REPLACEMENT
1. IF YOU REPLACE THE MAIN PCB ASSY ................................................................................. 4-1
1.1 Setting Default Paper Size (LED Models) / Setting by Spec (LCD Models) ....................... 4-2
1.2 Installing Firmware (Sub Firmware, Demo Firmware, and Main Firmware) ....................... 4-3
1.2.1 Checking firmware version ..................................................................................... 4-3
1.2.2 Installing firmware .................................................................................................. 4-4
1.3 Setting Serial Number and Entering Adjusted Value of Laser Unit ..................................... 4-5
2. IF YOU REPLACE THE LOW-VOLTAGE POWER SUPPLY PCB ASSY ................................. 4-6
2.1
Reset Irregular Power Supply Detection Counter of Low-voltage Power Supply PCB .......... 4-6
3. IF YOU REPLACE THE LASER UNIT ........................................................................................ 4-7
3.1 Entering Adjusted Value of Laser Unit ................................................................................ 4-8