HP DesignJet T730

Components
Other than the cosmetic aspects of the covers, there are several sensors related to the subsystem covers. The
sensors are designed to detect the status of the cover, open or closed.
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The Ink Door Sensor senses whether the Ink Cartridge Cover is open or closed. Opening the Ink Cartridge
Cover starts ink cartridge replacement automatically. The sensor is hosted in the printer chassis.
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HP Designjet T730 Printer only: The Central Cover hosts the Top Cover Sensor to sense whether the
Central Window is open or closed.
IMPORTANT: HP Designjet T730 Printer only: Be careful to avoid damaging the sensor while removing
the Central Cover. See Central Cover on page 284.
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The PHA Door sensor detects the door opening so that the printer is aware of the user’s intention of
interacting with the PHI connector or PHA.
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The Output Tray Sensor senses whether the Output Tray is open or closed. To avoid paper jams while
printing on roll paper, the tray should be closed.
IMPORTANT: Damage to the covers can cause the sensors to malfunction.
Removal and installation
In order to proceed with the removal and installation of the covers its important to bear in mind their
cosmetic aspects. It is recommended that you use gloves for any service operation involving the covers.
Due to the layout of the covers, it is important to bear in mind that some parts require removal before you can
remove a specic cover.
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Right Cover requires Front Cover removal.
IMPORTANT: Right cover removal interacts with the ink tubes. There is only one way to remove the
right cover; with the ink door open and the PHA door closed.
8 Chapter 1 Printer fundamentals ENWW