IP | Troubleshooting |
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SECTION 7. TROUBLESHOOTING
PROBLEM
System power failure
System does not operate
DKTU does not operate
SLT does not operate
CO line operation
ISDN board does not operate
Noise on External Paging port
Distorted External
MOH
CAUSE / SYMPTOM | SOLUTION | ||||
Power short circuit in | Exchange the malfunctioning board for one in good working | ||||
some board(s) |
| condition. | |||
LD6 LED light on the MBUB | Dust each board. | ||||
Check the PSU fuse. | |||||
is OFF or blinking |
| Replace the PSU with the appropriate type. | |||
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Power short circuit in | Check the connection of each board with MBUB. | ||||
some board(s) |
| Press the Reset button. | |||
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| Check the PSU. | |
Bad board connection | |||||
Check the short circuit on MBUB or other boards. | |||||
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| Press the Reset button when the DIP switch (for database | |
System database broken | |||||
protection) is in the default position. | |||||
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Bad extension circuit | Exchange the malfunctioning board for one in good working | ||||
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| condition. | |
Bad | connection | between | The connection between the system and the keyset must | ||
the MBUB/DTIB and keyset | be repaired. | ||||
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| Check the connection between the line of SLIB and DTIB | |
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| on the MDF, and fix any mismatching. | |
The | limit | of | installation | Check the distance between the MBUB/DTIB and keyset. | |
distance |
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Bad keyset |
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| Plug the keyset into another extension port that has been | ||
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| verified as working. | |
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| If the keyset does not work, replace the keyset. | |
Bad MBUB or SLIB board | Exchange the board for one in good working condition. | ||||
Bad | connection | between | Check that the board connection between the lines of SLT | ||
the MBUB/SLIB and SLT | and DKT on the MDF, and fix any mismatching. | ||||
ACNR Fail |
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| Check the PRCPTU4, and CPCU4 | ||
Bad connection |
| Check the connection. | |||
The position of switch | Check the switch for term and So/To position | ||||
Network problem |
| Check the Network. | |||
Induced noise on the wire | Use a shielded cable as the connection wire between the | ||||
between the system and the | system and amplifier. | ||||
amplifier |
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| A short shielded cable is recommended. | ||
Excessive | input | level from | Decrease the output level of the external music source by | ||
external music source | using the volume control on the music source. | ||||
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