HP 72SI User Manual download pdf (Page 126)

5-6 Clean the Rail and Bearings

5. 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.

6. 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.

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

position.

Cleaning the Encoder

Strip

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.

Outside bearing

Inside bearing

Rail

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

Cleaning window

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HP 72SI User Manual Page 126