Toshiba TDP-MT8 Service Manual page 75

LED repeats 5 flash sequence
Projector shuts down after detecting high temperature
condition. LED flashes in repeated five-flash sequence.
It is very rare that a thermal switch opens under too little heat.
Right at shutdown you can unplug the projector and use a
multimeter to check the thermal switch. (page 91)
If it measures infinite resistance (open), the thermal switch is bad.
Substitute a good power supply and run
Run the projector long enough to confirm
TDP-MT8 Service Guide
Is the thermal
switch good?
Yes
projector long enough to know if that is
the problem. (page 43)
Solve the
problem?
Yes
the problem issolved.
Repeat the diagnosis process.
(page 70)
Replace the safety switch.
No
(page 55)
The problem is almost
always a power supply or
controller board with a
thermal breakdown problem.
Replace the controller ECA.
No
(page 16)
This is a thermal problem. If
a fan isn't running it causes
a power up problem because
fans have a sensor line that
prevents the projector from
properly starting up.
The safety switch
assembly includes
a thermal switch..
75