IBM 6400-I15 Maintenance Manual - Page 24

Mechanical Controls and Indicators, All Models (Figure 4) Control or Indicator Function Forms Thickness Lever Paper Supports Sets the platen for paper and forms of different thicknesses. Lever must be fully opened (raised) to load or unload paper. Help prevent paper jams by supporting inner sections of paper. Positioned manually by sliding them along shafts. Forms Thickness Pointer and Scale Tractors (2) Tractor locks (2) Horizontal Adjustment Knob Vertical Position Knob Ribbon Loading Path Diagrams Indicates relative thickness of forms/paper. Set this lever at A for thin (single-part) forms, B for thicker forms, and so on. Hold and feed paper. Used to set side margin and position paper horizontally. Lock tractors in position. Allows fine positioning of left print margin. Moves paper and tractors left or right. Used to set top of form or first line to be printed. Rotate to move paper vertically. Works when Forms Thickness Lever is open. Instructions showing how to load the ribbon correctly. One diagram is cast in relief on the shuttle cover, and another is printed on the paper scale. Paper Scale A horizontal scale graduated in tenths of an inch, useful for setting paper margins and counting text columns. (See below.) 1 inch 1 10 20 0.1 inch Column Number 24 Maintenance Overview