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Unit 6: Maintenance
S8400 Series Operator Manual
6-3 PN: 9001160B
REPLACEMENT PROCEDURES
This unit provides in-depth instruction on all primary component and assembly replacement, in addition to most
secondary components. Use the text in conjunction with their accompanied graphics to ensure complete
comprehension throughout the process. Especially observe all cautionary or warning notations.
PRINT HEAD REPLACEMENT
If the print head becomes damaged or worn, it can be easily removed and replaced without having to make critical
adjustments. Before replacing the print head, check the head counter values by printing a test pattern. Instructions
relating to the Head Counter may be found in the Configuration unit of this manual.
1. Switch off the printer and observe applicable lockout-tagout procedures.
2. Disengage print head latch (1, Figure 6-1) and remove ribbon stock as necessary.
3. Pull outward on print head release knob (2) to release defective print head (3) from print assembly (4).
4. Disconnect the two wiring harnesses (not shown) from defective print head (3).
5. Reconnect two wiring harnesses (not shown) to replacement print head (3).
6. Insert replacement print head (3) into print assembly (4) and lift upward into position until latched.
7. Restore power, reload the printer, reset the head counter, and test print to ensure proper function.
Figure 6-1, Print Head Replacement
CAUTION: STATIC ELECTRICITY CAN RESULT IN COMPONENT DAMAGE.
OBSERVE APPROPRIATE GROUDING PROCEDURES WHEN REPLACING ANY
COMPONENTS.
NOTE: Each of the printer’s wiring harness connectors are different from all others to
ensure proper mating. Mate each matching half for reconnection.
CAUTION: EXCERCZE CARE WHEN INSTALLING THE PRINT HEAD TO ENSURE
THAT ITS ELEMENTS ARE NOT DAMAGED DURING INSTALLATION.
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