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Switch
3ESS
Troubleshooting manual
AT&T 3ESS Troubleshooting Manual
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Contents
Table of Contents
Bookmarks
Table of Contents
Trouble Indication
Rectifier Circuit
Table of Contents
Card
Fig. 5
Tp4
Danger 4
Y| Voltages Inside y
Rectifier Cabinet
Are over 400
Volts to Ground
Inverter Failure
Tone Generation
Oscillator Circuit
Potentiometer be
[10] Replace
Yes
Repeat from Step
Digital Multimeter
See WARNING
Ringing & Tone
At Terminals
Peripheral Controller
And
Perform System Test
Warning
Caution
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AT&T PRACTICE
Provisional
Task Oriented Practice
(TOP)
3"ESS" SWITCH
SYSTEM TROUBLE CLEARING
Copyright ©1984 AT&T Technologies
All Rights Reserved
Printed in U.S.A.
Issue 2 | AUG 1984
233-143-100
TPG
TITLE PAGE
000
Table of
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