1.
IF YOU REPLACE THE MAIN PCB ..........................................................................6-1
2.
1.
CONTROL PANEL ....................................................................................................7-1
1.1
Users Mode...................................................................................................................... 7-1
1.2
User Maintenance Mode.................................................................................................. 7-3
1.3
Service Mode ................................................................................................................... 7-5
2.
HIDDEN FUNCTION MENUS .................................................................................7-15
2.1
Professional Menu ......................................................................................................... 7-16
2.2
Reset Parts Life Menu ................................................................................................... 7-23
2.3
Service Menu ................................................................................................................. 7-24
3.
NVRAM DEFAULT VALUE......................................................................................7-29
1.
2.
3.
HIGH-VOLTAGE POWER SUPPLY PCB CIRCUIT DIAGRAM ............................. A-10
4.
5.
GEAR LAYOUT DRAWING.................................................................................... A-12
6.
READMARKS ......................................................................................................... A-14
7.
8.
HL-5240L................................................................................................................ A-18
HL-5240/5250DN/5270DN/5280DW SERVICE MANUAL
vii
Confidential