HP 72SR manual Clean the Rail and Bearings

Rail 2. Wipe the entire length of the rail with a lint-free cloth or wipe moistened with isopropyl alcohol.

The rail surfaces that must be clean are the surfaces that touch the carriage bearings. These are the top surface, including the front and back of the front lip, and the side surface, behind the belt. Move the carriage manually or press the Carriage key on the control panel Front Page so you can access and clean the entire rail.

Top of the rail

Side of the rail (behind the belt)

Fig. 5-2. Cleaning the rail

Carriage Bearings 3. From the control panel Front Page screen, press the Access Heads key.

The carriage moves out of the service station to the access carriage position. The bearings are on the back of the car- riage.

There are four bearings that should be kept clean, one pair on each end of the carriage. Each pair of bearings rolls along the front and back of the lip on the top of the rail. If any buildup occurs on one of these bearings, banding or other artifacts could appear in printed output. This buildup can range from a fine dust to visible particles.

The fifth bearing rolls along the lower edge of the rail, behind the belt. Cleaning this bearing is not necessary, since it usually does not get dirty.

5-4 Clean the Rail and Bearings