5-4
Confidential
1.2.2 List of maintenance mode functions using [Go] key (LED models)
<End-user accessible maintenance mode>
<Maintenance mode functions for service personnel>
Front 
cover
No. of times [Go] key is 
pressed to enter 
maintenance mode
No. of times [Go] key 
is pressed to select 
function
Function
Refer 
to:
Closed 0 1 or 2 Test printing 1.4.1
3 Change USB No. return value 1.4.2
4 to 7 Test printing 1.4.1
8 Factory Reset 1.4.3
9 Test printing 1.4.1
10 Settings Reset 1.4.3
11 Quiet mode 1.4.4
12 Engine error ignore mode 1.4.5
13 One Push printing recovery 
mode
1.4.6
14 or more Test printing 1.4.1
Front 
cover
No. of times [Go] key is 
pressed to enter 
maintenance mode
No. of times [Go] key 
is pressed to select 
function
Function
Refer 
to:
Open 1 1 Check sensor operation 1.4.7
2 Print continuous lattice pattern 1.4.8
3 Invalid
-
4 Factory use (disabled)
-
5 Check RAM 1.4.9
6 Invalid
-
7 Change ON/OFF setting for 
duplex printing
1.4.10
8 Change A4/Letter setting for 
paper size
1.4.11
9 Engine error ignore mode 1.4.5
10 Invalid
-
11 or more Returns to the ready state
-