
Functional Overview
10-7
HP DesignJets 500, 510 and 800 Series Printers Service Manual
As explained earlier, the Power Supply provides +5.0V, +3.3V,
+12V and +32V to the Main PCA with the following maximum
output currents:
Front Panel
The user can interact with the printer in two ways: from the host via
the I/O channels or directly via the front panel. The Front Panel is
used to display messages (like the status of the machine or
warnings), to configure the printer and to send commands to it
(cancel the job or print a demo for example).
The Front Panel has an LCD display, 7 keys (no LEDs) and a buzzer
(to provide audible feedback to the user).
The front panel display is a 128 x 64 pixel graphic LCD. Every pixel
can be activated individually and the controller present on the Front
Panel board allows it to display both text and graphics at the same
time. The Front Panel has a positive reflective type display to improve
its viewing characteristics and does NOT have an LED backlight.
The Front Panel is connected to the Interconnect PCA and NOT
directly to the Main PCA.
Voltage Maximum Output
Current (A)
Systems
+3.3V 8.0 Digital Logic & EIO card
s
+5.0V 1.7
Sensors, Front Panel, Bitronics and
some analog logic in Main PCA
+12.0V 0.45
Aerosol & Cooling fans and to generate
the 5.0V going to the carriage
+32.0V 3.7 Motors, Vacuum Fan and carriage
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