Section 5: Troubleshooting
4.The projector will power down if the lamps were installed incorrectly or have failed. If the projector powers down during lamp replacement, it likely indicates the interlock has been in the open state for more than the allowed
5.2Displays
Symptom ' Image appears “squeezed” or vertically stretched into center of screen
CAUSE / REMEDY: | 1. Check your Resizing selection. |
Symptom ' The display is jittery or unstable…
CAUSE / REMEDY: 1. If the display is jittery or blinking erratically, ensure that the source is properly connected and of adequate quality for detection. With a poor quality or improperly connected source, the projector will repeatedly attempt to display an image, however briefly.
2.The horizontal or vertical scan frequency of the input signal may be out of range for the projector. Refer to Section 6, Specifications for scan frequency ranges.
3.The sync signal may be inadequate. Correct the source problem.
Symptom ' The display is faint…
CAUSE / REMEDY: 1. Brightness and/or contrast and/or gamma may be set incorrectly.
2.The source may be double terminated. Ensure the source is terminated only once.
3.The source (if
4.Check if the lamp operation mode has changed. Check
Symptom ' Turning White Boost ON appears to dim image…
CAUSE / REMEDY: 1. For all new sources, perform Auto Setup (Main menu) and enable Auto Input Levels before applying White Boost. Auto Setup should automatically optimize your Input Levels for the most common sources. Only trained technicians should modify Input Levels if further adjustment is required.
Symptom ' The display suddenly went dim…
CAUSE / REMEDY: 1. Check to see if the lamp operation mode changed from Dual Lamp to Single lamp
– this could be due to a lamp failure, fan failure or if the lamp has expired.
Symptom ' The upper portion of the display is waving, tearing or jittering…
CAUSE / REMEDY: 1. This can sometimes occur with video or VCR sources. Check your source.
Symptom ' Portions of the display are cut off or wrap to the opposite edge…
CAUSE / REMEDY: 1. Resizing and/or blanking may need adjustment.
2.The horizontal or vertical scan frequency of the input signal may be out of range for the projector. Refer to Section 6, Specifications for scan frequency ranges.
Symptom ' The display appears compressed …
CAUSE / REMEDY: 1. The frequency of the pixel sampling clock is incorrect for the current source.
2.Resizing, vertical stretch and positioning options may be improperly adjusted for the incoming source signal.
