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