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4.1.4 Thermostat (TS1)
To avoid any of the troubles accompanying an excessive rise in the
temperature inside the machine caused by a failure of the Cooling Fan to
dissipate heat produced by the Projection Lamp, there is a Thermostat
installed at the back of the Projection Lamp.
When the ambient temperature of the Projection Lamp exceeds 122°C the
Heat-Sensitive Plate expands pushing up the Pusher Pin, which in turn
cuts off the current to the Projection Lamp Circuit.
The Circuit is reset by pushing the Reset Pin.
Reset Pin
Bi-metal
Pin
Thermostat