P2 Inclined post and roller guide. Fixed post - not shown. P1 Stationary guide and impedance roller. P4 fixed guide. Make sure the white roller guide sleeves are cleaned thoroughly by rotating them.
Posts have a constant diameter with no channel.
The linear head, which resembles a conventional analogue head, can be cleaned with a swab, again using side to side strokes. The capstan shaft can be cleaned with alcohol. Do not clean the pinch roller as the alcohol will cause the rubber to become hard and crack over a period of time. Unless you have specialist rubber cleaner, leave the pinch roller cleaning until its next service. Make sure any excess moisture is removed after cleaning.