Index Description

1Encoder strip — allows precise positioning of the print- head carriage across the length of the platen.

2Main carriage drive belt — moves the carriage across the length of the platen.

Transport chain (not shown) — supports the ink sup- ply tubes that carry ink from the ink reservoirs to the printheads, power, and electrical signal cables.

3Platen — supports the media under the printheads during printing, warms the media in the print zone, includes vacuum to hold the media against the platen.

4Printhead carriage — carries the printheads, digital imaging sensor, and photodiode across the length of the platen.

Digital image sensor (on carriage, not shown) — detects the location of printed pixels for precise align- ment of the printheads, enables the automatic replace- ment of poorly-printing ink jets with substitute jets.

Photodiode (on carriage, not shown) — enables the creation of color transforms without an external spec- trophotometer (requires print server support), and the linearization of existing transforms.

5Spittoons — located at both ends of the platen, receives ink “spits” that keep the printheads at their optimal performance.

6AutoCleanTM Service station — catches purged ink from the printheads, wipes the printheads with clean- ing solvent. Wipers are automatically cleaned and cleaning solvent applied before wiping. Ink is periodi- cally spit when idle to keep the inkjets working.

7Ready-for-Refill LEDs — illuminates when there is room for a refill bottle of ink, or when the cleaning solvent reservoir is empty. Blinks when either the ink has been refilled and profiler not replaced, or when the profiler has been replaced but the ink has not been refilled.

8Control panel — displays messages and allows control of certain printer operations. Includes a contrast adjust- ment lever and audio feedback.

9Electronics module — contains the printer’s power supply and control electronics.

Parts Overview

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HP 72SR manual Index Description, Parts Overview