Service manual

Nacho Family Service Manual 20
Check fan operation
Exhaust fans
The two exhaust fans are not three wire fans. Thus, if either or both stops working, the four-flash red LED error
code will not appear. It is more likely that the projector will overheat or will be noisier. The noise level would rise
when one exhaust fan stopped working and the other ran at high speed to compensate. The projector may not shut
down and the fan error may not appear if the single exhaust fan can keep the temperature below the critical level.
You can visually check the operation of the two exhaust fans to see if they both work properly. Check the fans if the
projector exhibits symptoms of overheating or if the red status LED indicates that a fan issue is present.
Lamp blower
You can observe the lamp blower from the side adjacent to the color wheel (see the photo above). The lamp
blower is a three-wire fan, and failure will cause the Fan Stopped message to appear. The lamp will shut off.