13
5. Troubleshooting
SELF-TEST
The DSP-9+ has a complete self-test feature that verifies proper hardware and firmware
operation. The test has four different parts:
1.
Front panel switch test
2.
Back panel internal jumper test
3.
Audio circuit test
4.
Push-To-Talk (PTT) input test.
Audio Circuitry Test
1.
Temporarily remove the back panel internal jumper in position 1. This removes the 22
Ohm load resistor from the DSP-9+ input. (Remove the back bezel and the back panel to
reach the back panel internal jumpers. Do not remove the circuit board from the DSP-9+)
2.
Connect a RCA phono plug to RCA phono plug jumper cable from the audio input jack to
line output jack.
3.
Connect the DSP-9+ power input jack to a 12-16 VDC @ 1 Amp. power supply.
4.
Connect a 4 - 8 Ohm speaker to the speaker output jack. Alternatively, connect mono
headphones to the front panel headphone jack.
5.
Press and hold the "Mode" switch in while turning on the power with the power/Gain
switch.
6.
The normal overload lights will flash on and off alternately until the Mode switch is
released.
7.
After the Mode switch is released, the Voice LED lights indicating the start of the front
panel push-button switch test.
8.
Depress any push-button except the "Mode" push-button. The DSP-9+ will produce a 500
Hz. tone.
9.
Depress a second push-button. The tone will change to a 2 kHz.
10. If the audio circuitry is operating correctly, the normal LED will be on and the Overload
LED will be off.
11. The audio circuitry test is complete. Replace the back panel internal jumper in position 1 if
it was removed in step 1. Continue the self test from this point by going to Step 6 of the
front panel switch test. The self test may be ended at any time by turning the DSP-9+ off.
Front Panel Switch Test
1.
Connect the DSP-9+ power input jack to a 12-16 VDC @ 1 Amp. power supply.
2.
Connect a 4 - 8 Ohm speaker to the speaker output jack. Alternatively, connect stereo
headphones to the front panel headphone jack.
3.
Press and hold the "Mode" switch in while turning on the power with the power/Gain
switch.
4.
The normal overload lights will flash on and off alternately until the Mode switch is
released.
5.
After the Mode switch is released, the Voice LED lights indicating the start of the front
panel push-button switch test.
Summary of Contents for DSP-9+
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