| 1. Switch on and off a screen wiper that its brush has occupied a starting position. |
| 2. Lift a decorative cap 1 (fig. jet Replacement see) on the screen wiper lever. |
| 3. Take out accurately flat-nose pliers a jet 2. |
| 4. Insert a new jet into an aperture of the platen 3 against the stop, having directed vertically upwards a jet aperture. |