The Display Is Jittery Or Unstable; The Display Is Faint; The Upper Portion Of The Display Is Waving, Tearing Or Jittering; Portions Of The Display Are Cut Off Or Warped To The Opposite Edge - Christie CP4230 Service Manual

4.5.12 The Display is Jittery or Unstable

1. If the non-cinema display is jittery or blinking erratically, ensure that the source is properly connected and
is offering 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 9 Specifications
3. The sync signal may be inadequate. Correct the source problem.

4.5.13 The Display is Faint

1. The source may be double terminated. Ensure the source is terminated only once.
2. The source (if non-video) may need sync tip clamping.

4.5.14 The Upper Portion of the Display is Waving, Tearing or Jittering

This can occur with video or VCR sources. Check your source.

4.5.15 Portions of the Display are Cut OFF or Warped to the Opposite Edge

Resizing may need adjustment. Adjust until entire image is visible and centered. For more information, refer to
the CP4230 User Manual (P/N: 020-100621-xx).

4.5.16 Display Appears Compressed (Vertically Stretched)

1. The frequency of the pixel sampling clock is incorrect for the current source.
2. Sizing and positioning options may be adjusted poorly for the incoming source signal.
3. Use an anamorphic lens for typical HDTV and anamorphic DVD sources that have been re-sized and
vertically stretched, via 3rd-party software.

4.5.17 Display Quality Appears to Drift from Good to Bad, Bad to Good

1. The source input signal may be of low quality.
2. The H or V frequency of the input may have changed at the source end.
CP4230 Service Manual
020-100622-04 Rev. 1 (05-2016)
for scan frequency ranges.
Section 4: Troubleshooting
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