HP color laserjet 4500 Manuale Utente

Chapter 2 Service tools

 EN

A good understanding of how the printer operates is required to use the 
engine diagnostics successfully.

To have a better view of the areas being exercised, remove the left-side 
cover and the ITB drawer. Defeat the two ITB drawer switches located 
on the left side of the drawer cavity. 

Listed below are the diagnostics available and a brief description of 
what the diagnostic will do. 

Continuous

N (default)

Selected test will run once.
Selected test will run in a continuous 
loop. In the 4550 series only, 

[C

ANCEL

 J

OB

]

 will abort the test.

Y (press 

to exit)

Turns on the motors that control the 
paper path section of the printer. In 
the 4550 series only, 

[C

ANCEL

 J

OB

]

 

will abort the test.

Paper Path Test

Rotates the carousel and the 
developers. In the 4550 series only, 

[C

ANCEL

 J

OB

]

 will abort the test.

Developer Test

Turns on the drum drive motor that 
drives the drum and ITB. In the 4550 
series only, 

[C

ANCEL

 J

OB

]

 will abort 

the test.

Drum Test

Displays the state for each of the 
paper path sensors and switches. In 
the 4550 series only, this test will 
continue running until the 

[C

ANCEL

 

J

OB

]

 key is pressed.