IBM 5150 Hardware Maintenance Manual page 158

Error
Description
Diagnostic Action
Ribbon 1. Remove ribbon cartridge. Try a print
,,-..,
Jammed operation to verify that print head carriage
functions normally. If carriage fails, see
page 1400-11, "No Printing."
2. Check ribbon cartridge for binding by
manually advancing ribbon. Replace if
binding.
3. Visually check for worn or broken ribbon
drive gears. Replace Carriage Drive
assembly if damaged. (See Section 3,
"Removal/Replacement.")
4. Check for bent ribbon shield. Replace if
necessary. (See Section 3, "Removal/
Replacement.")
r"...
5. Check print head for broken or binding
wires. Replace print head if wires are
broken or bound. (See Section 3,
"Removal/Replacement.")
.
" ..--....,
•
1400-17