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Chapter 7---Troubleshooting
7-4
Model 250 Service Manual
Figure 7-2
Dip Switch Block on System Controller PCB.
Reset Switch - The Reset Switch resets the CPU if the projector locks up and does
not respond to an IR Remote, PC or Laptop computer. If the rear panel is in place,
the CPU can also be reset by cycling the AC Circuit Breaker off and back on
again.
CAUTION!
If the Arc Lamp was operating or recently
turned off (the cooling fans were still running) at the time the CPU
locked up, it is very important to turn the AC Circuit Breaker back on
immediately to power ON the cooling fans. The cooling fans are
needed to cool down the Arc Lamp, Optics and PCBs properly to avoid
damage to optical and electronic components.
If the Reset Switch is used, the cooling fans will stop momentarily and
begin operating again automatically.
Figure 7-3
LEDs visible from the left side of the Electronics Module.
For a complete description on each of the LEDs, check the individual PCBs LEDs
in this section.