CHAPTER 4: Operation and Troubleshooting
11
4. Operation and Troubleshooting
4.1 Operation
Turn on the rear-panel POWER rocker switch. The front-panel POWER LED will light.
The PSD operates automatically. Except for manually disabling a sub-channel, you will not need
to attend to the PSD.
4.2 Changing Setting During Operation
If you have to reconfigure the PSD for a different type of operation, turn off the PSD and unplug it from its AC
power source before taking off the cover to change settings.
4.3 Troubleshooting
POWER SUPPLY
If the unit is attached to an AC power source and the green Power LED does not light up, check the following:
• Make sure the rear-panel rocker switch is on and is lit.
• Verify that the 110/220 selector is set correctly.
• Unplug the unit and check the fuse (see Figure 5 for location of the fuse).
• Remove the top cover and verify that the 4-pin power connector is attached to the transformer on the
printed circuit board (PSD-8 only).
PSD M
ALFUNCTION
If the Power LED is lit, but the PSD is not functioning, unplug your unit. Take off the cover and check the
following:
• Verify that all the DCE/DTE switches are set according to the data-system requirements.
• Double-check each of your strap settings.
• Visually inspect the large chips labeled RJ-006. Make sure that they are securely attached to the printed
circuit board.
