Ithaca PcOS 80 Series, Maintenance Manual

Page: 39 / 65

Assembly/Disassembly 31
1. Remove the cover assembly (see page 26).
2. Remove the outer housing (se page 27).
3. Release the paper feed button (1) from the cover assembly (2) by removing
the retaining ring (3).
Note: Hold the button in place in order to avoid the compression spring (4)
and button from flying out.
4. Remove the compression spring (4) from the cover assembly (2).
5. Unscrew the 4-40 set flat socket screw (5) using a .050 in. hex driver.
Notes on Installing the Cover and Adjusting the Cover Open
Switch
1. Use a .050 in. hex driver to insert a 4-40 set flat socket screw (5) into the
cover assembly, at its correct location. Refer to above illustration. Before
inserting the set screw, apply Loctite 425 to the set screw threads. Insert the
screw until only two or three threads are visible.
2. Snap the cover assembly into the hinges. Close the cover.
3. The switch is wired normally open in series with the cover lever switch
which is also normally open. Connect an ohmmeter across the black and
white wires, positions 3 and 4 on the six pin wire harness connector (J6).
The cover lever switch must be closed in order for the ohm meter to register
the closing of the cover open switch. As you turn the set screw
counterclockwise, the switch will actuate and the meter reading will switch
from open circuit to a very small resistance. Turn the set screw an
additional ¾ turns (270º).