Epson TM950 - B/W Dot-matrix Printer Troubleshooting Manual page 9

Self-test is not normal.
Start
Does the printer
operate at all?
Yes
Printing is carried out, but
print quality is deficient or
paper feeding is not normal.
Is the Ink Ribbon
installed correctly?
Does it have enough
ink?
Yes
Return unit to PC-PoS.
Beyond Local Repair.
Part 6 cont.
No
Is the cover
closed properly?
Return unit to PC-PoS.
Beyond Local Repair.
No
Install print ribbon correctly or
change print ribbon for a new one.
No
No
Yes
OK?
Yes
END
Close cover properly.
No
OK?
Yes
END