Service mode functions

Service menu

The SERVICE menu is PIN-protected for added security. Only authorized service people have access to the SERVICE menu. When you select SERVICE from the list of menus, the product prompts you to enter an eight-digit PIN number. The PINs for the HP Color LaserJet Enterprise CP4020-CP4520 Series are 11402509 and 11452509.

1.Press the Home button.

2.Press the down arrow to highlight SERVICE, and then press the OK button.

3.Enter the eight-digit PIN using the alphanumeric keypad.

4.Press the OK button to enter the PIN and open the SERVICE menu.

The following menu items appear in the SERVICE menu:

CLEAR EVENT LOG

This menu item allows you to clear the event log.

 

 

CLEAR BOOTLOADER PASSWORD

This menu item allows you to clear the bootloader password if

 

it has been lost.

 

 

TOTAL PAGE COUNT

The page count stored in NVRAM and displayed on the

 

configuration page represents the number of pages that the

 

formatter has formatted (engine test prints are not included in

 

this number). If it becomes necessary to repair a product by

 

installing a DC controller PCA, you must set the page count so

 

that it represents the age of the print engine rather than the age

 

of the DC controller PCA. When you press either the up arrow

 

or down arrow to change the value of the first digit, the

 

prompts are changed to indicate an acceptable range and the

 

appropriate value.

 

 

MONO CYCLE COUNT

After replacing the formatter, use this item to reset the mono

 

page count so that the figure continues to represent the page

 

count for the product engine. The page count that is stored in

 

NVRAM and printed on the configuration page represents the

 

number of pages that the formatter has formatted (not

 

including engine-test prints). If you install a new formatter when

 

repairing a product, use this menu item to reset the page count

 

to the previous value. In this way, the page count reflects the

 

number of pages that the engine has printed rather than

 

restarting the count for the new formatter. The page count is in

 

two categories: total mono pages and total color pages.

 

 

COLOR CYCLE COUNT

After replacing the formatter, use this item to reset the color

 

page count so that the figure continues to represent the page

 

count for the product engine. The page count that is stored in

 

NVRAM and printed on the configuration page represents the

 

number of pages that the formatter has formatted (not

 

including engine-test prints). If you install a new formatter when

 

repairing a product, use this menu item to reset the page count

 

to the previous value. In this way, the page count reflects the

 

number of pages that the engine has printed rather than

 

restarting the count for the new formatter. The page count is in

 

two categories: total mono pages and total color pages.

 

 

420 Chapter 3 Solve problems

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HP CP4525DN Laser CC494A#ABA manual Service mode functions, Service menu