Disassembly Flow - Brother HL-4040CN, HL-4050CDN, HL-4070CDW Service Manual

7.

DISASSEMBLY FLOW

Basic Operation
8.1
AC cord
8.7 8.8
20s / 20s
DX feed ASSY MP cover ASSY/
MP paper guide ASSY
(HL-4050CDN/
HL-4070CDW only)
8.14
Paper guide DX/
- Earth plate (15s/15s)
HV TR top cover
- Registration-mark sensor
PCB ASSY 1 (10s/10s)
- Registration-mark sensor
8.15
PCB ASSY 2 (10s/10s)
- Density sensor (10s/10s)
Transfer HVPS PCB unit
- Registration relay PCB
ASSY (10s/10s)
- Transfer HVPS PCB
ASSY (20s/ 20)
8.16
Registration-mark sensor PCB
ASSY 1, 2/ Density sensor/
Registration relay PCB ASSY/
Transfer HVPS PCB ASSY
8.34
Waste toner near/full
sensor ASSY
8.18
8.22 8.24
95s / 120s
Paper feed frame unit
THM/HUM sensor
(35s/50s)/
T1 PE/edge sensor
PCB ASSY (60s/70s)
8.32
8.23
20s / 50s
Engine PCB ASSY
Belt cleaner release
sensor PCB ASSY
8.33
Main PCB ASSY/
Ground plate/
Ground spring plate
8.47
8.51
10s / 10s 8.48
Develop release
Drum drive ASSY/
sensor PCB ASSY
Drum phase sensor
PCB ASSY 1, 2
8.54
70s / 70s
8.49
Toner sensor PCB ASSY
Drive frame unit ASSY
K, Y, M, C (TE/NEW)
- Release drive holder
(10s/10s)
8.50
- Eeach sensor (15s/15s)
Paper feed/belt cleaner
Each
8.55 10s / 20s
8.57
New toner actuator/
New toner actuator
Drum lock lever L
spring
8.2 8.3
5s / 5s 20s / 20s
Toner cartridge
8.9 8.21
15s / 15s 20s / 20s
MP lift arm 2/ Roller holder ASSY
MP roller holder ASSY
10s / 10s
8.11
10s / 10s
Back cover upper
8.12
30s / 50s
45s / 60s
Paper eject ASSY DX/SX
8.13
10s / 10s
75s / 75s
Back cover ASSY
40s / 40s
20s / 20s
Side plate LB
8.19
40s / 50s 10s / 10s
Drum unit fan (OPC)
holder ASSY
110s / 120s
40s / 40s
8.52
35s / 35s
Develop press
45s / 60s
drive L ASSY
Develop drive
motor ASSY
80s / 80s
8.53
20s / 20s
Front cover interlock
switch ASSY
15s / 20s
- Drum drive motor
(10s/10s)
- Drum drive ASSY
(50s/50s)
10s / 10s
- Drum phase sensor
PCB ASSY 1 (10s/10s)
- Drum phase sensor
motor ASSY
PCB ASSY 2 (10s/10s)
15s / 15s
8.6
10s / 10s 25s / 25s
Drum unit Paper tray
8.10
10s / 10s 20s / 25s
Fuser unit/
Toner filter frame ASSY
8.17
30s / 30s
Side cover L ASSY
8.35
30s / 30s
Top cover ASSY
8.45 8.36
10s / 10s 15s / 15s
Wireless LAN PCB ASSY Top cover panel ASSY
(HL-4070CDW only)
8.37
20s / 20s
LCD panel PCB ASSY
8.46
80s / 80s
8.38
Laser unit (60s/60s)/
Rubber key
Hook slope (20s/20s)
printed ASSY
8.39
5s / 15s
Key Cap Up/
Down, L, R
8.40
20s / 20s
USB host relay
PCB ASSY
8.41
15s / 15s
LCD panel ASSY/
8.25
10s / 15s
LCD stopper
Release rack
8.42
50s / 50s
8.26
60s / 70s Paper chute
Front door unit ASSY
8.43
10s / 10s
Top cover R
8.27
10s / 10s
Harness cover MP
8.44
20s / 20s
Top cover L ASSY
8.28
20s / 20s
Front door sub
8.29
20s / 40s
EL electrode spring L/R
8.30
50s / 60s
Hook cover/
Front cover release button/
Button spring (30s/30s)/
Front door main (20s/30s)
8.31
20s / 20s
Hook shaft/ Hook/
Hook spring
3-21
Disassembly / Re-Assembly (sec.)
8.4 8.5
5s / 5s 5s / 5s
Belt unit Waste toner box
8.20
30s / 30s
Side cover R ASSY
8.56 8.58
35s / 35s
Side plate R ASSY
Drum lock lever R
8.59
15s / 15s
Charge HVPS
PCB ASSY
5s / 5s
8.61
Each
8.60
10s / 20s
Fuser unit fan (FU)
Toner LED PCB ASSY
8.62
8.63
Air intake fan (AIR)
8.64
8.65
15s / 15s
5s / 5s
5s / 5s
LVPS fan (PS)
5s / 5s
40s / 60s
PS PCB unit
60s / 70s
Belt unit drive
motor ASSY
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