Fans Run, No Lamp - InFocus LP630 Service Manual

Fans run, no lamp

Some fans, no lamp.
Note: With an open thermal switch, lamp comes on,
then goes out, and fans run at full speed.
Note: All fans are sensed to detect if they are running.
If one is not running the others will run at full speed and the
lamp will not come on.
For any fan not visible, sub a fan into the connector.
Remove the lamp and check it for rupture, cracks, or bulges.
If there are no visible problems, lamp is almost always good.
Or sub a known good lamp.
If lamp looks good or the know good lamp does not light,
continue to the next step.
LP630 Service Manual
(page 8)
Are
power supply
voltages good?
(page 80)
yes
Are
lamp enable
voltages good?
(page 80)
yes
Replace ballast.
(page 41)
There are four fans
connected to the controller.
The connectors are labeled
on the controller ECA.
Replace
power supply
no
(page 46)
Replace
controller ECA /
no
optical engine set
(pages 16 & 34)
72