XG-PH70X (serv.man3). Electrical Adjustment - Sharp Projector Service Manual (repair manual). Page 8

XG-PH70X/XG-PH70X-N

3 – 8

CAUTION: When the unit is returned to a user with the sensors disabled, the cabinet may be deformed by heat because the protection function does

not work. After completion of inspection, be sure to restore the sensors to their original state.

• Temperature sensor

Mount a resistor of 10 k_ between pins 1 and 2 of CN7205 and a resistor of 12 k

Ω between pins 1 and 2 of CN7005 to turn on the power with the

sensor detached. Since the unit is set to the sensor temperature fixed mode, the fan speed is fixed to low speed. After completion of inspection, be
sure to remove the resistors.

• Fan lock detection

• Air filter cover detection

Short-circuit between pins 1 and 2 of CN7001.

Since the power turns on even if the filter cover is removed, the user may be injured with the fan. After completion of inspection, be sure to restore
it to its original state.

• Lamp cartridge detection

This unit has two lamps. When turning on the lamp with one lamp cartridge removed, the cabinet may be deformed by heat. After completion of
inspection, be sure to restore the lamp cartridge to its original state.

Short-circuit between pins 1 and 2 of CN2801/CN2802.

• Color wheel motor/Photosensor

Cannot be disabled. Connect an extension jig.