DSP-599zx Audio Noise Reduction Filter
March 6, 1997 8-1
8
Troubleshootin
Most of the functions of the DSP-599zx can be checked using the LCD dis-
play, the LEDs, the internal sine wave generator and audio millivoltmeter
and your ears.
The most common problem with amateur radio equipment is defective or in-
correctly connected cables. Check them carefully!
Check our World Wide Web site (http://www.timewave.com) for additional
troubleshooting hints.
Common Problems and Solutions.
Nothing comes on when I turn on the power.
1. Check power connection to DSP-599zx.
2. Make sure your power supply is on.
3. Verify that you have 12-16 Vdc at the power connection with center
pin positive.
4. Check the fuse for continuity. Loosen the two screws holding each of
the bezels in place. Slide bezels off the unit.
5. Remove four screws holding the front panel in place. Carefully discon-
nect the two ribbon cables from the rear of the front panel.
6. Remove the four screws holding the rear panel in place.
7. Turn unit over and remove the two screws from the bottom of the case.
8. Observing static precautions carefully turn unit upright and slide cir-
cuit board assembly about two thirds of the way out of the case.
9. Visually check fuse in lower left corner. Check with meter if not sure.
If you need to replace fuse replace with 1.6A 5 mm x 20 mm (Radio
Shack Part #270-1051 or equiv.)
10. Reassemble reversing instructions above.
11. Reconnect only power cable and turn on. If lights stay on, power off
and reconnect all other cables. Power back to test. If unit does not light
up, call our technical support department.
March 6, 1997
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