Electra Elite
Issue 6
System Hardware Manual
10 - 7
No Internal Dial Tone to any Multiline Terminal or SLT
Incorrect or No DC Voltage
Check AC Input
Power.
DC
Voltages
Correct?
Good
Bad
AC Power?
Good
Turn system Off. Disconnect all
circuit boards.
Turn system On.
Dial tone on Multiline
Terminal on 1
st
ESI(8)-U( )
(MBD-U10 Unit)?
Replace
Fuse(s).
Bad
PSU Fuses
F1 & F2
?
Good
No Dial Tone
Yes
Problem
Solved?
No
Dial Tone?
Dial Tone
Rebuild system, one
card at a time until
problem reappears.
Replace defective
card.
Problem
Solved?
Build system
one card at a
time, and
replace bad
ETU(s).
Yes
No
1. If problem not solved, perform First Initialization
and test. If trouble persists go to step 2.
2. Replace B48-U10 KSU and test system using
default program.
Reset ESI(8)-U( ) ETU. If trouble
persists, replace B48-U10 KSU.
A1
Replace Corresponding
Power Supply.
Remove all ETUs and
retest.
Replace KSU.
Correct AC Power
Problem.
Done.
Dial Tone
No Dial Tone
Содержание ElectraElite 48
Страница 2: ...SYSTEM HARDWARE MANUAL Stock Number 750376 Issue 6 Series 8000 48 ...
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Страница 10: ...Regulatory Information ...
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Страница 51: ...Issue 6 Electra Elite xxxii List of Figures THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 56: ...1st Tab Chapter 1 Introduction ...
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Страница 78: ...2nd Tab Chapter 2 System Specifications ...
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Страница 102: ...3rd Tab Chapter 3 Hardware Requirements ...
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Страница 110: ...4th Tab Chapter 4 Installing the KSU ...
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Страница 135: ...Issue 6 Electra Elite 4 24 Installing the KSU THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 136: ...5th Tab Chapter 5 Installing Electronic Telephone Units ...
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Страница 256: ...6th Tab Chapter 6 Installing Electra Elite Multiline Terminals ...
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Страница 289: ...Issue 6 Electra Elite 6 32 Installing Electra Elite Multiline Terminals THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 290: ...7th Tab Chapter 7 Installing Optional Equipment ...
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Страница 344: ...8th Tab Chapter 8 Installing Dterm Series i Equipment ...
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Страница 358: ...Electra Elite Issue 6 System Hardware Manual 8 13 Figure 8 15 Removing the Line Panel ...
Страница 363: ...Issue 6 Electra Elite 8 18 Installing Electra Elite IPK and Dterm Series i Equipment Figure 8 21 Installing Base Cover ...
Страница 395: ...Issue 6 Electra Elite 8 50 Installing Electra Elite IPK and Dterm Series i Equipment THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 396: ...9th Tab Chapter 9 Installing Electra Professional Equipment ...
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Страница 403: ...Issue 6 Electra Elite 9 6 Installing Electra Professional Equipment THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 404: ...10th Tab Chapter 10 System Maintenance ...
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Страница 428: ...11th Tab Appendices ...
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Страница 433: ...Issue 6 Electra Elite A 4 Glossary of Abbreviations THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 434: ...SYSTEM HARDWARE MANUAL NEC America Inc Issue 6 Series 8000 48 ...
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