Service manual

Nacho Family Service Manual 21
Checking fan voltages
Checking fan voltages allows you to determine whether the fan or the ECA to which it connects is faulty.
1 Remove the top enclosure (page 31).
2 Plug the projector into a power source.
3 Measure the voltage at pin one at both fans and the blower at both power down and power up states. The
voltage for both exhaust fans and the lamp blower should be ~5VDC when the lamp is off, and ~11VDC
when the lamp is on. Additionally, pin two on the lamp blower should read 1.5VDC when the blower is
good, and 3.3VDC when the blower is not working properly.
Controller ECA detail I/O ECA detail
If the voltage on pin one is good and the fan/blower does not work, replace the part. If voltage is not
present, the controller is most likely faulty.