HP 2000CP 2500CP - Manual (Page 324)

Functional Overview 10-5 HP DesignJet CP Series Printers
Encoder Strip
The encoder strip is used by the carriage Assembly as a reference point. The
carriage assembly sensor reads windows in the encoder strip. This enables
the carriage assembly to know exactly where it is on the Y-axis assembly.
Trailing cable
The trailing cable consists of three ribbon cables. There are 32 conductors in
each cable, however conductor number 1 and 32 are not used, as they can be
broken when removing or installing. The three cables are all strapped
together, but are misaligned to make them easier to connect to the carriage
assembly. One end of the trailing cable is printed with red lines. These show
the engineer which end of the trailing cable to install into the carriage
assembly.
Service Station Assembly
The Service Station is housed inside the right hand cover. At the top of the
Service Station is the printhead cleaner carriage. This assembly contains
four printhead cleaners (one for each printhead). Printhead cleaners are
disposable cassettes which maintain the condition of the printheads.
The main functions of the Service Station are:
D Move the Printhead Cleaner Carriage to the different positions needed to
perform the maintenance tasks on the printheads.
D Enable the change of the printhead cleaners by the customer.
D Press caps on the printhead cleaners against the printheads with
sufficient force to assure a perfect seal.
D Move the wipers on the printhead cleaners with a minimum speed to
clean the printheads.
Primer Assembly
The Primer Assembly applies a vacuum to the printhead. It is a
sub-assembly of the Service Station Assembly. It has two chambers (one
larger than the other). Air is moved from one chamber to the other by a
motor, this results in a vacuum which is applied to the printhead for
maintenance purposes.
Refill Assembly
The Refill Assembly is housed inside the left hand cover. It refills all four
printheads simultaneously when the ink in any of the printheads fall below
a certain threshold. Ink is moved from the ink cartridges to the printheads
via four tubes. The ink is sucked up the four tubes to valves in the Refill
Assembly by air pressure. This is controlled by the raising and lowering of
the ink cartridges, which is done by the Elevator Assembly.