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CHAPTER 8: Troubleshooting

8. Troubleshooting

8.1 Power Problems

Problem:The Pro Switching System does not power on. (The cooling fans do not
rotate; or when you press the LAMP TEST button, no LEDs on the System light.)
Solution #1:Make sure the power supply module is fully inserted into the rack
mount.
Solution #2:Make sure the AC power cord is properly connected to the rack mount,
and that the power cord is plugged into an AC power source.
Solution #3:Make sure the line fuse is good.

8.2 Control Card Problems

Problem:The LINK ON LED does not light.
Solution #1:Make sure that the control card is fully inserted into the rack mount.
Solution #2:Make sure that the power supply modules are functioning properly.
Solution #3:Make sure that DS5, the configuration DIP switch, is set properly.
Solution #4:Make sure that all socketed integrated circuit chips (IC chips) are
properly inserted into their sockets.
Problem:Power Supply OK LEDs do not illuminate.
Solution:Make sure that the power supply modules are functioning properly.
Problem:FAN FAIL LEDs illuminate.
Solution:Make sure that the power supply modules are functioning properly.

8.3 Switching Problems

Problem:Gang switching does not work.
Solution #1:Make sure that the KEY SWITCH is in the unlocked position.
Solution #2:Make sure that the interface cards are fully inserted into the rack
mount.