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Appendix 1 Maintenance and Inspection
Periodic Inspection
Check the following items periodically, once every six months. Also, check these points if any surrounding conditions or any aspect of the environmental changes.
| Table A.1 | Periodic Inspection Items |
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Inspection item | Inspection |
| Criterion | Resolution procedure |
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Power supply systems | Measure the |
| Voltages must be within the | Adjust the input voltages to be |
(T2N power supply/MAU | voltage at the |
| stipulated ranges. | within the stipulated ranges. |
power supply) | terminals. |
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|
|
| Check for loose screws at the | There must be no | Turn off (remove power from) | |
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| looseness. | the power supply and tighten | |
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| down the screws with a |
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| screwdriver. |
| Check for damage to the |
| There must be no damage. | Turn off (remove power from) |
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|
| the power supply and replace | |
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|
| the damaged cables. |
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| |
Installation state | Is the module firmly locked in | There must be no | First press the module. | |
| place? |
| looseness or play. |
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| |
Transmission cable | 10BASE5: Are the AUI cables | There must be no | First press the cable firmly into | |
connections | firmly locked in place? |
| looseness or play. | the connector and then slide |
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|
| The 10BASE5 connector | the slide latch to the locked |
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| position. | |
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| slide latches must be in | |
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| |
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| their locked positions. |
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| 10BASE2: Are the coaxial |
| There must be no | First press the |
| cables firmly locked in place? | looseness or play. | firmly into position and then | |
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|
| The | engage the |
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| |
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| must be engaged. |
|
| There must be no | First press the twisted pair | ||
| cables firmly locked in place? | looseness or play. | cable into modular connector. | |
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| The modular connector |
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| locks must be engaged. |
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Transmission cable wiring |
| There must be no damage. | Stop the system, turn off | |
(See section 9.4, | damage to the cables. |
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| (remove power from) the power |
"Network Wiring".) |
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| supply and replace the |
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| damaged cables. |
| Are the cables installed near | There must be no power or | Separate the cables from the | |
| any power or other cables? |
| other similar cables in the | power lines. |
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| vicinity. | Shield the cables. |
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Ambient conditions | Verify that temperature, |
| The values must be within | Improve the environment so |
| humidity, vibration, and dust |
| the ranges from the | that all aspects are within the |
| levels are all within the |
| general specifications for | ranges stipulated in the |
| stipulated ranges. |
| the module. | specifications. |
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⎯ 169 ⎯