
14.1 Power and Indicators |
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Problem | Remedy | |
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No Power | 1. | Confirm that the rocker switch is in the “ ON” position, and that the lamp is |
| illuminated. | |
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| 2. | Confirm that power connections are secured at the amplifier and at the |
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| receptacle. Make sure the receptacle is active, outputting the proper mains |
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| voltage. |
| 3. | If there is still no power, check the fuse. Remove power cord from the AC |
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| outlet and from the machine and then, using a flat head screwdriver, remove |
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| the fuse holder located directly below the power connector. Confirm that the |
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| fuse is good by looking at the wire connected to the ends of the fuse. If the |
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| wire is broken, replace the fuse with another, with the same value. |
14.2 Video Signal
Problem | Remedy | |
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No video at the output device, | 1. | Confirm that your sources and output device are powered on and connected |
regardless of input selected. |
| properly. Video signals connected to the input of your switcher should be of an |
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| identical signal format at the output of your source. Video signals at the output |
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| of your switcher should be of an identical signal format as at the input of your |
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| display or recorder. |
| 2. | Confirm that any other switchers in the signal path have the proper input and/or |
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| output selected. |
| 3. | Use the Video Tester to test the video path leading to/from your switcher (see |
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| section 4.1 " Video Tester") |
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Video level is too high or too dim. | 1. | Verify that the video line is well interfaced through 75ohm impedance, |
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| otherwise it results in a video level that is too high or too dim when looping is |
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| performed and the termination switches are not in proper position. |
| 2. | Confirm that the connecting cables are of high quality, properly built and |
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| terminated with 75ohm BNC connectors. Check level controls located on your |
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| source input device or output display or recorder. |
Weak switcher input signals | The switcher contains two internal trimmers, accessed via two holes in the base of | |
| the switcher. These allow, if necessary, to adjust switcher output signal level. For | |
| example, if you are using a long cable with heavy losses, you can compensate for it | |
| by fine tuning the signal using the two trimmers. One trimmer adjusts the gain of | |
| the whole video signal and the other adjusts only the high frequencies of the video | |
| which have been degraded by a low quality cable. The hole closer to the power | |
| socket controls the cable compensation the other controls the video level. | |
| WARNING! Do not use the trimmers except in cases where the cable losses | |
| result in poor resolution of detail or when the whole signal level crashes. | |
| Once they have been touched, the accurate signal transparencies that have been | |
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| a stable signal generator and a good quality signal analyzer. | |
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KRAMER ELECTRONICS LTD. | 20 |
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