1 Nov. '87
4. EXPOSURE LAMP CONTROL
The exposure lamp is controlled by thelamp control PCB [PCB2], which con-
tains both the exposure lamp regulator circuit and the fusing lamp control cir-
cuit.
The main CPU sends the lamp trigger signal (LOW) from CNI 14-4 about 1
second after the Start key is pressed. This signal actuates the lamp regulator
circuit, which energizes the exposure lamp [L2].
The optics thermoswitch [TS2], which is mounted in the reflector, protects
against overheating of the optics cavity.If the temperature rises above 130
degrees C, it opens the lamp circuit. |