HP 72SR manual Cleaning the Encoder Strip, Clean the left and right inside bearings

Outside bearing

Rail

Inside bearing

Cleaning window

Cleaning the Encoder Strip

Fig. 5-3. Carriage bearings, left pair shown

4.Clean the left and right outside bearings.

Moisten a cotton swab with isopropyl alcohol or water, place it against the left side of the bearing, and manually push the carriage to the left. Then place the swab against the right side of the bearing, and manually push the carriage to the right. Repeat once or twice. Remove any large dust particles you see.

5.Clean the left and right inside bearings.

Insert a moistened cotton swab into the bearing cleaning window, and clean the bearing by manually pushing the car- riage to the left and right. Repeat once or twice. Remove any large dust particles you see.

6.Press the ! (Proceed) key to return the carriage to the home position.

The top surface of the encoder strip should be cleaned as needed (approximately monthly under typical service) with a lint-free cloth moistened with SolaChrome-HR cleaning fluid. After cleaning, wipe the top surface of the encoder strip with a new lint-free cloth moistened with isopropyl alcohol. To check the condition of the encoder, view it with a piece of white paper held underneath it. The encoder strip should be cleaned if the encoder index marks (fine black lines that are perpendicular to the length of the encoder strip) are not clearly visible.

Clean the Rail and Bearings 5-5