5-42
Confidential
1.4 Details of Maintenance Mode Functions Using [Go] 
(LED models)
 End-user accessible maintenance mode functions
1.4.1 Test printing
This function is used to print a test pattern (print quality check sheet) to check any missing 
image and print quality.
<Operating Procedure>
(1) Check that the front cover is closed. Press and hold the [Go], and turn ON the power 
switch. The Toner, Drum, and Paper LEDs light.
(2) Release the [Go]. All LEDs go out.
(3) Press the [Go]. Test printing starts.
Fig. 5-12
(Second side)(First side)