PCM-2 Manual.pdf - Voss Associates

screws, nutplate and switch actuator assy. The switch and wiring can then
be extracted from the mounting bracket where it must be unsoldered from
its electrical leads. Noting the positions of the switch leads on the switch
contacts, resolder the switch leads to the contacts of the new switch. Install
the new switch to the switch mounting bracket in reverse order of removal.
Adjust the switch within its mounting slots and/or by slightly bending the
switch actuator arm so that the switch makes contact upon a slight deflection
of the footplate grille (as by the weight of a user) but does not make contact
with the footplate grille in place by itself. When the proper switch
adjustment has been made, remount the access panel cover plate or return
the unit to the upright position.
Hand Position Switch
The hand position switch is located lower electtronics enclosure mounted on
the inside, right-hand side of the consloe base panel. It is readily accessible
thm the PCM-2's side door and by removing the lower electronics enclosure
cover panel. Like the weight switch, it mounts with two screws and a
nutplate thm twin adjustment slots on the panel and its contacts are soldered
to its electrical leads. Remove the switch and install a new switch noting to
resolder the leads and to remount the switch and actuator as before. Adjust
the loosely mounted switch so that the switch contacts release upon only a
very slight deflection of the "floating" hand detector panel and so that the
switch contacts make positively upon return of the panel back to its springloaded
rest position. Tighten the switch mounting screws.
Hip Position Switch
This switch, which senses user hip position via displacement of the long red
hip switch actuator rod, is located in the uppermost cavity of the island
panel assembly above the island panel's detectors. Replacement of the
switch in older PCM-2 models (Serial no's 001 thm 218) first envolves
removing the island panel's front cover panel and the palm and thigh
detectors from the island assembly. This affords limited accesss to the hip
switch for its removal. Loosen and remove the two switch mounting screws
to disassemble the switch from its mounting bracket and extract the switch
and its wiring thm the rear of the island assembly. Clip or unsolder the
wires from the switch and re-solder them to the new switch in the same
contact locations, noting to bend the switch contacts towards the switch case
as per the old switch. Tape the switch mounting nutplate to the switch body
on top with a thin double-sided tape, aligning the press nuts in the nutplate
with the switch's mounting holes, and puncture the tape film thm each
pressnut. This will keep the mounting nutplate in place on the switch
during the "blind" switch placement, mounting and adjustment operations.
Route the newly prepared switch and wiring back up and into the upper
island panel cavity again thm the rear of the island panel. Position the
switch on the mounting bracket and loosely install the two mounting screws,
PCM2.MANI REV AI April 1995 9-3