
Maintenance and Troubleshooting
Table 5-1. Troubleshooting Chart (continued)
Symptom | Possible Cause(s) | Solution |
|
|
|
The display is jittery or | • | • Ensure that the source is |
unstable. | connected source. | properly connected and of |
|
| adequate quality for |
|
| detection. |
| • The horizontal or vertical | • Correct at the source. |
| scan frequency of the |
|
| input signal may be out of |
|
| range for the display. |
|
|
|
|
Image is too bright and/or | • Contrast is set too high. | • Lower the contrast setting. |
lacks definition in the bright |
|
|
areas of the image. |
|
|
|
|
|
Image appears “washed out” | • Brightness is set too high. | • Lower the brightness |
and/or dark areas appear too |
| setting. |
bright. |
|
|
|
|
|
Colors in the image are | • The Red/Pr, Green/Y or | • Ensure that the source |
swapped; for example, reds | Blue/Pb outputs from the | outputs are connected to |
appear blue or vice versa. | source are connected to | the correct DHD Controller |
| the wrong inputs on the | input. |
| DHD Controller. |
|
|
|
|
58 | Vistage™ Series |