Cleaning The Electrical Contacts; Scheduled Maintenance; Level Of Printer Usage - HP DesignJet 2500CP Service Manual

Cleaning the Electrical Contacts?

The problem.
The printer fires drops by sending electrical signals from the printhead carriage
to the printhead through the electrical contacts present on the carriage and on
the printheads. The problem is that when you load the printheads into their
stalls, sometimes some ink goes over the carriage electrical contacts, and when
the printhead is installed over the printhead electrical contacts. When the
printer prints, some ink goes to the bottom of the electrical contacts. This causes
electrical continuity problems that can be fixed very easily.
The solution.
A new tool has been created especially to clean the electrical contacts and is
called the Ink Cleaner (Part Number C6247A includes the instructions).

Scheduled Maintenance

In some segments of the printer market, the customer tends to print more
than the maximum number of prints that the throughput allows, exceeding
by far the limit of the design. When this happens the customer runs into
print quality problems and continuous Printer failures.
The purpose of scheduled preventive maintenance is to avoid these failures
ensuring a good performance during all the product life.

Level of Printer Usage

Normal printer use means an average of 15 image prints with an area of
2 2
0.76 m /print (8 ft. /print) per day. If the prints are smaller than this, the
number of pages per day can be higher.
Under normal usage conditions, it will be approximately 5 years before the
printer needs maintenance. If the printer is used more than the normal usage
conditions, then it will need maintenance service much more frequently.
One of the EEROM counters is assigned to counting the number of swaths.
When the printer exceeds 7,000,000 passes (HP DesignJets 2500CP/2000CP)
or 6,000,000 passes (HP DesignJets 3500CP/300CP), the front panel displays
the following message:
Maintenance Advised"
The Service Print also conveys the usage information, and it is accessible by
the user.
Once the maintenance advised message is displayed, the preventive
maintenance kit must be used to replace the most worn parts of the printer.
Use the Removal and Installation Chapter of this Service Manual as a guide
to replace the necessary parts.
9-4 Preventive Maintenance
HP DesignJet CP Series Printers