Service manual

Troubleshooting and Diagnostics Troubleshooting and Diagnostics
6-7 6-8
6.5 Print-related Problems If the printout or the character set is not ok, the following procedure can help to
S Print faint or of poor quality.
S Have you used the correct paper? See User´s Manual Chapter 7
Technical Data which contains a full specification of the paper you
can use. Replace the paper if it does not match the specification.
S Make sure that the ribbon is stretched correctly.
S Does the ribbon need changing? Replace it with a new ribbon if
necessary.
S Is the ribbon cartridge properly installed? Adjust as necessary.
S Characters do not print evenly or are not uniform in pitch
S Examine the paper pathway for dirt or other obstruction that may cause
the gap between print head and platen to vary. Remove the obstruction.
S Print lines overlap
S Examine the paper pathway for dirt or other obstructions that may
prevent the platen from rotating freely. Remove the obstruction.
S On preprinted forms, the printing on the copies is not aligned with the
preprinted matter
S Refer to User´s Manual section 3.4. Vertical Positioning
(VERT.POS.ADJ.)
S Part of printed text is missing (loss of data)
S If you are using Serial communications check the buffer control setting
in Set-up.
S Check the data flow control setting on the host computer.
clear the situation.
Action Result Check
Select and start PRINT Print not OK? - PAPER SOURCE
TEST 1 selection
- Ribbon tension and
condition
- Print head condition
Stop SELF TEST and No printing starts - Printer ONLINE
start external printing READY
- Interface cable for
proper connection
- Interface selection
Some characters not - Emulation
correct - Character set
- National version
- Word length
- Baud rate
- Parity bit
- Protocol
Font and pitch quality - Font
fault - Pitch
- Line space