IBM System/370 145 Operating Procedures Manual page 37

RIBBON REMOVAL and REPLACEMENT (continued)
3215 Console Printer-Keyboard
CAUTION
Using a ribbon cartridge not designed for this
PR-KB can damage the locating pin.
TO REMOVE THE RIBBON CARTRIDGE
1.
Press the NOT READY key.
2. Raise the printer cover.
3. Remove the ribbon and cartridge.
TO REPLACE THE RIBBON CARTRIDGE
4. Position the hole in the bottom of the cartridge over
the locating pin sticking up out of the ribbon feed
mechanism, and press the cartridge into place.
5. Thread the ribbon through the ribbon guides following
the path shown. Do not twist the ribbon.
6. Rewind any slack in the ribbon by turning the left
(front) cartridge post in the direction of the arrow.
7. Lower the printer cover.
8. Press the READY key.
36
Print Head
I'
77 , 2 Z 2 2 Z I 2 7 222 , 777 Z 27 Z 2
Z
771
PZZZZZlZZZZZlZZ2ZZZZZzzzzzza
Print Position Scale
RIBBON THREADING SCHEMATIC
Ribbon
Cartridge