HL-5240/5250DN/5270DN/5280DW SERVICE MANUAL
Confidential
7-15
2. HIDDEN FUNCTION MENUS
The three hidden function menus are provided for the HL-5270DN/5280DW printer with the LCD.
•
Professional Menu: by pressing the
Go
and
Set
buttons at the same time.
•
Reset Parts Life Menu: by pressing the
Go
and
+
buttons at the same time.
•
Service Menu: by pressing the
+
and
Set
buttons in this order while holding down the
Go
button.
The method to enter the special mode by the button operation is as follows:
<Pressing the
1
button when the printer is turned ON>
Panel Function
Go
To
Users
Mode
Reprint
Continuous test printing
+
Version Check
-
Hex Dump Mode
Set
Initializing the NVRAM
<Pressing the
2
button when the printer is turned ON>
Panel Function
Set
&
Back
Rewriting the Flash ROM
Go
&
+
Checking the hardware (DRAM check, etc.)
Go
&
Back
-
&
+
Factory Line Inspection Mode
Go
&
Set
Clearing the E50 (FUSERMULF)
<Pressing the
2
button in the normal status>
Panel Function
Go
&
+
RESET PARTS LIFE (Clearing the counters of the periodical
replacement parts)
Go
&
Set
Professional
Menu
-
&
Set
Indicating the error descriptions (The details of the service call or
paper jam occurrence section are indicated in English.)
<Others in the normal status>
Panel Function
Go
& (
+
,
Set)
Service Menu (Acquiring the service information such as the
number of replacement or paper jam occurrence, error, etc.)
Go
& (
-
,
+
,
Set)
Developer Menu (Setting the specific function for the engineers)