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Bad ballast.
Replace Ballast.
(page 37)
Replace
Power Supply.
(page 55)
Replace
Controller ECA.
(page 34)
Note
The color wheel must also be
running
for a good 'lamp enable' signal.
Color wheel failure is almost always
due to bad voltage from the
controller board.
Does the
lamp light and
stay lit?
TDP-P4 Service Manual
No Lamp
(continued)
Does
'lamp enable'
Yes
measure 5 volts?
No
Are
power supply
No
voltages good?
Yes
Are
all fans
Yes
running?
Replace
fan assembly.
(page 31)
Lamp Fan
(page 27)
Front Fan
Engine Blower
Replace the
No
optical engine
(page 45)
All fans have a feedback
sensor line that disables the
ballast and lamp. When one
or more fans are not
running, the projector will
power up for 60 seconds
and then shut down.
(page 93)
Sub good fan or
blower. You can
No
plug in the fans
without installing
Yes
(page 53)
Replace Controller ECA.
(bad voltage to fan)
(page 90)
them.
Does the fan
run?
No
(page 34)
80
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