HP 2500 L Service Manual

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Service mode functions
Cold reset 
A cold reset sets most, but not all, default variables stored in NVRAM back to factory default 
values. For example, It typically does not reset the page count, paper tray sizes, localization 
language, or formatter number. To reset all variables, see  “NVRAM initializer ” on page 209.
To perform a cold reset
1 Turn the printer off.
2 Press and hold down the  G
O button.
3 Turn the printer on and continue to hold the  G
O button
4 After the Go, Attention, and Ready LEDs turn on, continue holding the  G
O button for 
approximately five seconds, but not longer than fifteen seconds. During this process, the 
Attention LED will turn off.
5 Release the  G
O button.
Note If either the Go or Ready LED turned off or no LEDs turned off before the  GO button was released, 
then repeat steps 1 through 5.
6 The printer LEDs will begin cycling from front to back. The cold-reset process runs until the 
printer is in the Ready state.
NVRAM initializer
NVRAM initializer sets all default variables stored in NVRAM back to factory default values or to 
a default ROM value, depending on the variable. It also performs a system reset.
NVRAM initializer resets the following:

all menu settings to factory default values

factory settings such as formatter number, page counts, factory paper settings
To perform a NVRAM init
1Turn the printer off.
2 Press and hold the  G
O button.
3 Turn the printer on and continue to hold the  G
O button.
4 After the Go, Ready, and Attention LEDs turn on, continue holding for at least 20 seconds. 
During this process, the Attention, Ready, and Go LEDs will each turn off.
5 Release the  G
O button.
6 The device LEDs will begin cycling from front to back. The NVRAM-init process runs until the 
printer is in the Ready state. 
						

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Troubleshooting tools
Demo page 
To print the Demo page, press  (GO) when the printer is Ready (Ready light on) and is not 
printing. You can also view this page from the HP Color LaserJet 2500 Series Toolbox.
Configuration page 
The Configuration page lists current settings and properties of the printer. You can print a 
Configuration page at the printer control panel, in the embedded Web server, or from the 
HP Color LaserJet 2500 Series Toolbox. To print the Configuration page from the printer, press  (G
O) and  ( CANCELJOB) simultaneously. (The Supplies Status page also prints. If you 
have an HP Jetdirect print server card installed, the HP Jetdirect page listing the HP Jetdirect 
information prints as well.)
1 Printer Information.  This section contains basic information about the printer, such as the 
product name, printer name, and page count.
2 Event Log. This section contains information about printer errors.
3 Installed personalities and options. This section contains information about optional items  that might be installed, such as DIMMs or an HP Jetdirect print server card.
4Memory.  This section lists memory-related information, such as the total memory installed.
5 Paper Tray Information. This section contains information about the trays, such as whether  optional trays are installed, and the type and size of paper that might be set for each tray.
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2
4
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Supplies Status page 
The Supplies Status page lists the remaining life of HP print cartridges and HP imaging drums. It 
also lists the estimated number of pages that can be printed with the remaining supplies, number 
of pages printed, and other supplies information. You can print a Supplies Status page at the 
printer control panel or from the embedded Web server. To print at the printer, press  ( G
O) 
and ( C
ANCELJOB) simultaneously. (The Configuration page also prints. If you have an 
HP Jetdirect print server card installed, the HP Jetdirect page listing the HP Jetdirect information 
prints as well.)
1 Ordering Information.  This section contains basic information about how to order new HP 
supplies.
2 Print-cartridge area.  This area contains a section for each of the print cartridges and 
provides information about HP print cartridges. This information includes the part number for 
each print cartridge, whether each print cartridge is low, and the life remaining for each print 
cartridge expressed as a percentage, as a graphic, and as the estimated number of pages 
remaining. This information is provided only for HP supplies. If a non-HP supply is installed, 
you see an alert message instead.
3 Recycling Information.  This section contains information about the website you can visit for 
information about recycling.
4 Imaging-drum area.  This area contains the same information for the imaging drum that the 
print-cartridge area provides for the print cartridges.
5 Warranty Note.  This section contains information about how the printer warranty is affected 
when you use non-HP supplies. It also requests that you call the HP fraud hotline if a supply 
that is being detected as a non-HP supply was sold to you as a genuine HP supply. (See the 
user guide for information about the HP fraud hotline.)
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2
4
3
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General timing charts
Figure 112.General timing chart —WAIT period 
						

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Figure 113.
General timing chart —one page, full-color, normal speed 
						

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Figure 114.
General timing chart —one page, full-color, half speed 
						

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Locations of connectors
Figure 115. Locations of printer connectors (1 of 3) 
						

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Figure 116.
Locations of printer connectors (2 of 3)
Figure 117. Locations of printer connectors (3 of 3) 
						

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Figure 118.
Locations of 250-sheet tray connectors
Figure 119. Locations of 500-sheet tray connectors 
						

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Dc controller connections
Figure 120.Dc controller connections