Toshiba Strata DK 280 Installation Manual page 645

Digital Business Telephone System
Release 3
Fault Finding
Contents
Chapter 12 - Fault Finding
12.1
12.2
12.3
12.4
12.5
12.6
12.7
Figures
12-l
12-2
Tables
12-l
12-2
12-3
12-4
Fault Classification .......................................................................................................................
.12-l
Fault Clearing Procedures .............................................................................................................
12-l
Defective Parts Return .................................................................................................................
.12-2
Common
Control Fault Isolation ....................................................................................................
12-2
RPSU280 Power Supply Test .......................................................................................................
12-2
Station Cable Continuity
Check ..................................................................................................... 12-5
12.6.1
Voltmeter Test ................................................................................................................. .12-5
12.6.2 Ohmmeter Test ................................................................................................................
.12-5
12.6.3 Cable Installation
..............................................................................................................
12-5
Fault Isolation Flowcharts .............................................................................................................
.12-5
Flowchart Symbols ........................................................................................................................
.12-l
RPSU280
Power Supply Voltage Test Points / Circuit Breakers / Jumper Plugs.. ........................ .12-4
(Electronic Telephone Cables) Station Cable Continuity Check Using Voltmeter..
....................... .12-6
(Electronic Telephone Cables) Station Cable Continuity Check Using Voltmeter..
....................... .12-6
(Digital Telephone Cables) Station Cable Continuity
Check Using Voltmeter.. .............................. 12-6
(Digital Telephone, Attendant Console, DDSS, or DDCB Cables) Cable
Continuity Check Using Ohmmeter.. .............................................................................................
.12-6
January 1996 i