Text preview for : SY31-0703-0_Twinaxial_Cabling_Troubleshooting_Guide_Nov89.pdf part of IBM SY31-0703-0 Twinaxial Cabling Troubleshooting Guide Nov89 IBM 525x SY31-0703-0_Twinaxial_Cabling_Troubleshooting_Guide_Nov89.pdf
Back to : SY31-0703-0_Twinaxial_Cab | Home
----
- - - ---
- - ---
- --- -- SY31-0703-0
--_ .- .
----_
-
Twinaxial' Cabling
Troubleshooting Guide
----
-----
----
- ---
- - - ---
--_.-
--~-
----- SY31-0703-0
Twinaxial Cabling
Troubleshooting Guide
First Edition (November, 1989)
This guide is intended to help isolate and fix the majority of problems that can occur when attaching 5250
type displays and printers to a S/36, S/38, AS/400, 5294, or 5394, using twinaxial cabling, telephone twisted
pair, IB M cabling system, or fiber optic convertors.
If after using this troubleshooting procedure, you continue to have problems, consult your Installation Plan-
ning Representative and/or your branch office support center. We would appreciate your feedback on the
effectiveness of this procedure, particularly for situations that may be unique to your installation. Any ques~
tion or comments on this publication can be directed to:
IBM Corporation
Department 49D Building 050-3
3605 Highway 52 North
Rochester, Minnesota 55901
Attn: \Vork Station Controller Engineering
The intent of this publication is to provide early feedback to field service personnel about a topic of general
interest on the subject machine types. The material in this publication is provided on an "AS IS" basis
without any warranty either expressed or implied.
This publication has not been subjected to any formal testing or extensive review.
The material in this publication must be individually evaluated for applicability to a particular installation.
Some of the material in this publication is of a preliminary nature. Any engineering changes implied in this
publication may or may not ever be released.
The material contained herein shall not be reproduced in whole or in part without the written permission of
IBM.l
AS/400 is a trade mark of the International Business Machines Corporation.
Copyright International Business Machines Corporation 1989 - All rights reserved.
11
Contents
1.0 Introduction ................................................................. 1
1.1 Safety ..................................................................... 1
1.2 Ohmmeter Measurement Recommendation .......................................... 1
1.3 Starting Point ........................ '........................................ 2
2.0 System Specifications ........................................................... 3
2.1 All Systems ................................................................. 3
2.2 5520 Systems ................................................................ 3
2.3 Workstation Controller Output Levels ............................................... 4
2.4 Transmission Signal Pattern ..................................................... 5
2.5 AS/400 Systems .............................................................. 5
2.5.1 Twinaxial Commands and Sequences ........................................... 5
2.5.2 9406 System Grounding ..................................................... 6
2.5.3 Error Logging ............................................................ 6
2.5.4 WSC Output Levels ........................................................ 6
2.5.5 Hand1.i.i1g Noise on Twinaxial Cables ........................................... 7
3.0 \Vork Station Controller Configuration .............................................. 8
3.1 AS/400 WSC Configuration ..................................................... 8
3.2 S/36 WSC Configuration ....................................................... 8
3.3 S/38 WSC Configuration ....................................................... 9
3.4 5294 WSC Configuration ....................................................... 9
3.5 5394 \VSC Configuration ....................................................... 9
4.0 DC Cable Tests .............................................................. 10
4.1 Preparation ................................................................. 10
4.2 Testing Cable Termination ..................................................... 10
4.3 Testing for Shorts ............................................................ 10
4.4 Testing AS/400 Systems ....................................................... 10
4.5 T-Connectors ............................................................... 11
4.6 Notes .................................................................... 11
5.0 Phase Tests ................................................................. 12
5.1 Preparation ................................................................ 12
5.2 Testing for Correct Phase Connection ............................................. 12
5.3 Testing AS/400 Systems ....................................................... 12
5.4 Notes .................................................................... , 12
5.5 End View of Twinaxial Connector ............................................... 13
6.0 Station Protectors ............................................................. ]4
6.1 Requirement ............................................................... .14
6.2 Grounding ................................................................. 14
6.3 Part Numbers ......................... '. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 14
6.4 Functional Check ............................................................ 14
7.0 AC Noise .................................................................. 15
7.1 Steady State AC Noise ........................................................ 15
7.1.1 Intermittent Transients ..................................................... 15
7.1.2 AS/400 Systems .......................................................... 16
Contents 111
8.0 Ground Potential Difference (GPD) ..