Midmark Preva - Optional Installation Procedures; Installing the Coil-Cord Hand Switch Option (30-A2040)

Preva Installation/Service Manual, 00-02-1577, Revision E01
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Optional Installation Procedures
Installing the Coil-cord Hand Switch Option (30-A2040)
The Preva Dental X-ray System can be installed with a coil-cord hand switch
(30-A2040). The coil-cord hand switch is used to make exposures, in addition
to or replacing the use of the exposure button. Installation of the coil-cord
hand switch involves connecting the hand switch into the connector on the
bottom of the Operator Panel.
Jumper
Configuration for
Coil-cord Hand
Switch
If the coil-cord hand switch is used, it may be required to disable the
Exposure button on the control panel (consult local laws). A jumper must be
removed on the Operator Panel Board 30-08054, shown in
Figure 41, to
disable the operation of the hand switch.
1. Turn the power off.
2. Remove the Operator Panel from its mounting on the Control Unit or wall
plate.
3. Unplug the cable that connects the Operator Panel to the Control Unit.
4. With a Phillips screwdriver, remove the 4 screws from the back of the
Operator Panel. Put the screws in a safe location for later use.
5. Remove the back cover from the Operator Panel. Lift out the Operator
Panel Board 30-08054.
6. To disable the use of the Exposure button on the Operator Panel, locate
point J7 on the Operator Panel Board 30-08054. Then remove the shunt
on J7.
7. Put the Operator Panel Board 30-08054 back in position.
8. Put the cover on the back of the Control Panel using the 4 screws.
J7 – Exposure Switch Jumper Settings
Jumper Position
Switch Closure Required for Exposure
1-2, 3-4 (default)
Remote Switch or Panel Switch (parallel)
2,3
Remote Switch and Panel Switch (series)
3,4
Remote Switch (panel switch disabled)