Section 7: Troubleshooting; Symptom/Solution Table; Message/Solution Table - 3M MP8780 Operator's Manual

Section 7: Troubleshooting

7.1 Symptom/Solution Table

Symptom
Power cannot be
turned on.
No picture and sound.
Sound is heard with no
picture.
Picture is displayed with
no sound.
Color is weak and tint is
incorrect.
Picture is dark.
Picture is not clear
LAMP indicator lights
red.
Cover indicator red.
TEMP indicator
red.

7.2 Message/Solution Table

Error Message Displays
NO SIGNAL IS
DETECTED.
INVALID.
CHANGE THE LAMP.
LIFE: 50 HS
CHANGE THE LAMP.
NO LIFE.
© 3M 1999
Downloaded From projector-manual.com 3M Manuals
Cause
• The Main power is not turned on.
• The power cord is disconnected.
• 90 seconds have not elapsed since
the power was turned off.
• The setting of the input source is not
correct.
• RGB/Video/Audio wiring to projector is • Connect the cable to correct input/output source.
not correct.
• RGB/Video/Audio wiring to projector
is not correct.
• Lens cap is on.
• Audio wiring to projector is not correct. • Connect the cable to correct input/output source.
• The volume is set to minimum.
• The unit is muted.
• The color and tint have been adjusted
incorrectly.
• The brightness and contrast has not
been adjusted incorrectly.
• The lamp needs to be replaced.
• Projector is out of focus.
• Lamp will not ignite.
• Air filter door on bottom of case
is open.
• Temperature inside projector
is too hot.
Cause
The projector is not detecting a signal.
The horizontal frequency of input signal
exceeds projector capability.
Lamp operation time is greater than 950
hours.
Lamp operation time is greater than 1,000
3M ™ Multimedia Projector MP8780
Solution
• Turn the MAIN POWER switch on.
• Insert the power cord into an AC socket.
• Wait 90 seconds before turning on power.
• Set the correct input using the input select button of
the projector or the remote control.
• Connect the cable to correct input/output source.
• Remove lens cap.
• Press the VOL button to increase Volume.
• Press the MUTE button.
• Adjust the color and tint correctly.
• Adjust the brightness and contrast correctly.
• Replace the lamp with a new one.
• Adjust the focus and PHASE.
• Turn off power and let cool for 20 minutes, then restart.
• If problem persists call your dealer.
• Ensure air filter door is closed.
• Clear blocked ventilation holes.
• Clean air filter.
Solution
Check cable connections to input device. Input device not
connected to this input mode, switch to next mode.
Switch projector to correct resolution.
See Appendix A.5
Change the projector lamp and reset the lamp operation
hours to zero.
Change the projection lamp and reset the lamp operation
hours to zero.
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