Safety Switch - InFocus ScreenPlay 7205 Service Manual

Safety Switch

The safety switch interrupts power output from the power supply when the lamp door is removed from
the projector. It is located on the front side of the chassis in the lamp housing. A thermal switch mounted
near the safety switch monitors temperature in the projector lamp housing and cancels power supply
output if the temperature rises too high. The thermal switch and safety switch share a common cable to
the power supply. A new safety switch includes a thermal switch.
1 To access the safety switch, remove the chassis (page 11).
2 Unplug the safety switch cable from J3 on the power supply. Then remove the M3x6 Torx Plastite
screw that fastens the thermal switch to the lamp connector retainer.
3 Remove the two M2x8 Torx screws that fasten the safety switch to the chassis. Then remove the
safety switch cable from the eye on the chassis.
4 Remove the safety switch from the chassis.
Assembly Notes
•
To install the safety switch, orient it so that the lever actuator faces away from the mounting tab
on the chassis. The curved portion of the lever actuator fits into the slot in the bottom case near
the lamp cavity. A tab on the lamp door fits through the slot to close the safety switch when the
lamp door is in place.
•
Torque the two M2x8 Torx screws to 6 in/lbs. (.68 Nm).
•
Orient the thermal switch on lamp connector retainer so that the screw hole on the switch aligns
with the hole in the retainer. The white lettering on the switch should face up.
SP7205 Service Manual 45