2. MAJOR UNIT REPLACEMENT
EO18-33011
2.4 REPLACING THE PRINT HEAD
2- 6
2.4 REPLACING THE PRINT HEAD
1) Open the top cover. Turn the head lever and pinch roller lever counterclockwise to open the print
head and pinch roller. Then, open the ribbon shaft holder plate. (Refer to Section 2.2.)
2) Turn the head lever clockwise to lower the print head. Remove the two SM-4x8 screws through
the holes in the print block.
3) Turn the head lever counterclockwise and disconnect the two harnesses to detach the print head
from the print block.
4) Replace the print head with a new one, and connect the harnesses.
5) Turn the head lever clockwise and secure the print head with the screws through the holes.
6) After completing the reassembly, perform a print test to check the print quality.
(Refer to Section 6.7.) If the print quality is poor or the ribbon wrinkles, fine adjust the print head
position by loosening the SM-4x8 and SM-3x6 screws, and then perform a print test again.
Fig. 2-8
SM-4x8 Screw
Print Head
CAUTION!
1. NEVER touch the element when handling the print head.
2. NEVER touch the connector pins as static electricity discharges can damage the print head.
3. NEVER remove the two screws painted red from the print block.
4. NEVER remove the print block from the printer, as it requires the use of a special jig for
correct adjustment of position when reassembling.
5. Care must be taken not to damage the print head element during installation by hitting the
print head against the printer body, by scratching the element with a tool, etc.
Harness
Head Lever
Print Block
Never remove the
red screws.
Head Bracket
SM-3x6 Screw
SM-4x8 Screw
Print Head
Head Lever
Print Block
As viewed from the top of the print block
Fig. 2-9
