Chapter 13: Troubleshooting
13-2 General network problems and countermeasures
[1]Problems concerning the network and appropriate countermeasures (when unable to communicate)
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| Symptom | Check points | Check details | Countermeasure |
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| Is the indicator on the power supply lit? |
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| Whether main power lamps of |
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| communication modules are lit? |
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| Is the main power lamp on the AUI power | Check and reconnect |
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| supply modules lit? | |
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| Power source | the power cable. Check | |
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| Is the power output by AUI power supply | ||
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| the voltage. | |
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| module within the specified range (12 V)? | |
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| Are the power lamps on the hubs lit? |
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| Are power cables from the AUI properly |
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| connected to the equipment? |
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| Are there loose parts in the transceiver | Reinstall according to |
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| installation area? | section |
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| Connection |
| Adjust until they are |
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| Check for abnormalities using transceiver | normal. If errors occur | |
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| between the | ||
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| installation checking devices. | continuously, install the | |
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| communicati- | ||
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| unit in another location. | |
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| on cable and |
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| Reinstall according to | |
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| the | Are the transceivers properly insulated? | |
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| section | ||
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| Unable to | transceiver |
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| Were the transceivers properly installed to | Reinstall according to | |
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| communicate |
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| the communication cable at its marker | ||
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| section | |
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| section? | |
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| Are there loose parts in the transceiver | Reinstall according to |
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| installation area? | section |
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| Check for abnormalities using transceiver | See the installation |
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| Connection | manual of the | |
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| installation checking devices. | ||
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| between the | checker(s) | |
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| transceiver |
| Lock them properly |
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| cable and | Are the transceivers locked properly? | according to section 15- |
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| transceiver |
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| Check and reconnect |
13 |
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| Are the transceiver LEDs lit normally? | the power cable and |
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| check the voltage | |
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| Connection | Are there loose parts in the transceiver | Reinstall according to |
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| installation area? | section | |
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| between the |
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| Are the SD (sending) and RD (receive) | Check the error detail | |
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| transceiver | ||
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| LEDs lit normally? | according to Chapter 13 | |
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| cable and | ||
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| Make sure the media select switches (SQE | Reset according to | |
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| equipment | ||
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| etc.) are set properly. | section |
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