IBM PCjr

Error
Description
Forms Do
Not Advance
Overprinting
Forms
Jamming or
Tearing
Diagnostic Action
1. Check position of forms feeding into
printer. Forms path must be parallel to
printer sides. Reposition forms for parallel
feeding.
2. Check forms path for any obstructions (for
example, jagged edges on forms box, torn
paper in print mechanism). Remove any
obstructions.
3. Inspect left and right forms tractors.
— Poor positioning
— Loose covers
— Loose lock levers
— Worn springs
—
Broken feed pins
Replace left or right forms tractors if
damaged. See Section 4, "Removal/
Replacement and Adjustments."
4. Check for a loose or broken carriage belt.
Check for broken cogs on the belt. Adjust if
loose
or replace if broken. See Section 4,
"Removal/Replacement and Adjustments."
5. Inspect print head for broken wires.
Replace if wires damaged. See Section 4,
"Removal/Replacement and Adjustments."
6. Check print head gap adjustment. Adjust if
out of tolerance. See Section 4, "Removal/
Replacement and Adjustments."
7. Check for bent or pitted ribbon shield.
Replace shield if damaged. See Section 4,
"Removal/Replacement and Adjustments."
3-1400-14 Graphics Printer