IBM PCjr Hardware Maintenance And Service page 234

Failure Symptom
Page
Power Supply
3-1400-5
Print Head
No Printing
Print head carriage not moving
3-1400-10
3-1400-13
Forms
Forms not advancing; overprinting
Forms jamming or tearing
3-1400-14
3-1400-14
Ribbon
Ribbon jammed
3-1400-16
Print Quality
Printing too light; poor print quality
Smudged printing
Uneven printing (characters or lines)
Row(s) of print dots missing
Random print dots missing
Extra print dots
3-1400-17
3-1400-18
3-1400-18
3-1400-19
3-1400-20
3-1400-21
Printing continues beyond end-of-forms
3-1400-22
Doublespacing — abnormal characters
3-1400-22
False end-of-forms alarm
3-1400-23
Uneven horizontal spacing
3-1400-24
Control Panel
3-1400-25
3-1400-4 Graphics Printer