Polaroid Joshua Vision Service Manual page 127

Darkslide Cam
Darkslide Link
DKEC Switch
Door Latch Sensor
Door Stop
Door Stop Link
Encoder, Blade Position
Encoder Pair
EOC
EOP
Erected
Erect Link
Erect Sensor
Erect Switch
Exposure IC
Far Focus Lens
Feed Roll Clutch
A two-segment cam on the top of the Timing Gear, which actuates the
DKEC Switch through the Door Stop Link.
Pivoted arm on Power Actuator, driven upward by Film Shade when Film
Door is closed, to close VER to B+ and power Camera for darkslide.
One element of wireform Logic Switch which controls Darkslide, End of
Cycle and Mirror Down conditions.
Piece part of Power (Erect) Switch actuated by Door Latch cam. Lifts B+
wire when Door Latch is opened, lowers B+ when Door Latch is closed.
Prevents driving the gears until fully meshed.
Pivoted arm actuated by Film Door; closes DKEC through Door Stop Links
when Film Door is opened.
DKEC-actuating arm, cammed by Timing Gear.
See Blade Position Encoder.
Phototransistors used to detect shutter blade motion from passage of light
through coincident blade openings, as blades slide over each other.
End Of Cycle, signalled by Timing Gear opening DKEC Switch.
End Of Pack, signalled by EOP Switch closed after 10th exposure by cam on
Counter Wheel.
Refers to Camera ready for picture taking (opposite of collapsed).
Bottom link in Camera erecting linkage; its motion actuates Erect Sensor.
Part of Power (Erect) Switch rotated by Erect Link when Camera is erected,
which opens GND - VER contact and closes VER - B+.
One of two wireform switches in Joshua. Controls power from filmpack
battery to camera circuits through movement of GND, VER and B+ wires.
Integrated circuit in camera electronics which processes exposure
measurement data.
Supplementary lens moved into optical path for subjects in far focus zone
(2.4 m to infinity).
Allows upper Feed Roll to be rotated backwards if film frame must be
manually removed, without backdriving the gears.
A - 3