OKIDATA Pacemark 3410 Service Manual page 110

Microswitch 2 Modification
NOTES:
The information in this section is also covered in Technical Service Bulletin 1603.
A Pacemark 3410 Replacement Printhead Kit includes the items listed below.
TSB 1603
Read Me First Card
Head Gap Lever Adjustment Sticker
90 Day Warranty Extension Card
General Information
Modifying Microswitch 2 will reduce drive time and increase printhead life.
Perform this modification when a replacement printhead is installed.
Procedure
1. Remove the upper cover. (3.2.03)
2. Locate the blue head gap lever.
3. Set the blue head gap lever to Position 1.
4. Locate the two microswitches on the right side (platen knob) of the printer. The microswitch below the
head gap lever is Microswitch 2.
5. Make a paper clip into a hook.
6. Insert the paper clip hook into the small hole on the microswitch arm.
CAUTION:
The paper clip hook will keep the arm from falling into the printer during the next step.
7. Hold the paper clip and carefully cut the arm of Microswitch 2 at its base.
8. Discard the cut arm.
Verification
To verify that Microswitch 2 has been disabled, follow this procedure.
1. Set the head gap lever to position 5 or above.
2. Attach an ohmmeter to pins 5 and 6 of connector CN9 on the main control board.
3. Verify that the switch is closed.
4. Set the head gap lever to the proper setting for the paper (thickness) being used.
5. Replace the upper cover.