IBM 3720 User manual

I
----
-------
- -
---
---
- ---
-----
-----
--- '-

Publication Number
GA33-0086-2
IBM 3720 Models 1, 2, 11, and 12
IBM 3721 Models 1 and 2
Communication Controllers
Problem Determination
System/370, 30xx, 4300,
and 9370 Processors
File Number
S370/30xx/4300/9370·09

Third Edition (July 1988)
This major revision obsoletes GA33-0086-1.
It reflects enhancements to the IBM 3720 Communication
Controller.
Changes or additions to the text and illustrations are indicated by a vertical line to the left of the change.
Reference in this publication to
IBM products, programs, or services does not imply that IBM intends to
make these available in all countries in which IBM operates. Any reference to an IBM licensed program in
this pUblication is not intended to state or imply that only IBM's licensed program may be used. Any
functionally equivalent program
may be used instead.
The information contained in this manual is subject to change from time
to time. Any such changes will be
reported
in subsequent revisions or Technical Newsletters.
Publications are not stocked at the addresses given below. Requests for IBM publications should made to
your IBM representative or to the IBM branch office serving your locality.
A form for reader's comments is provided
at the back of this publication. If the form has been removed,
comments may be addressed to either
of the following:
• International Business Machines Corporation, Department 6RILG,
180 Kost Road, Mechanicsburg, PA 17055, USA
• IBM France, Centre d'Etudes et Recherches, Departement 0798,
06610
La Gaude, France.
IBM may use
or distribute any of the information you supply in any way it believes appropriate without
incurring any obligation
to you.
© Copyright International Business Machines Corporation 1986, 1987, 1988

Preface
The 3720/3721 Communication Controllers Problem Determination Guide is
designed to help the teleprocessing specialist to identify 3720 problems. This
manual contains:
• Problem Determination procedures
• Alarms, hexadecimal codes
• Some 3720 functions you may need to identify 3720 problems
• A 3720 bibliography
• An index that contains also entries from:
The 3720/3721 Communication Controller Operator's Guide
The 3720/3721 Communication Controller Extended Services manual.
Preface 111

iv 3720/3721 Communication Controller Problem Determination Guide

Contents
Unable to Power On the 3720 Model 1 or 11 ••••••••••••••••••••••••••••••••••••••••••• 1-1
Unable to Power Off the 3720 Model 1 or 11
1-5
3720 Model 1 or 11 Drops Power ••••••••••••••••••••••••••••••••••••••••••••••••••• 1-7
Unable to Power On the 3720 Model 2 or 12 1-11
Unable to Power Off the 3720 Model 2 or 12 1-13
3720 Model 2 or 12 Drops Power •••••••••••••••••••••••••••••••••••••••••••••••••• 1-15
Local Operator Console ........................................................... 1-1
No IBM Copyright Screen for Local Operator Console ................................... 2-2
Terminal Disconnected for Remote Console is displayed, or Remote Console Active Lamp is On ..... 2-3
Message COMM NOT READY 2 is displayed on the 3161 ................................ 2-4
Message LINE CHECK 2 is displayed on the 3101 ...................................... 2-4
Message SENDING is blinking on an IBM PC Emulating a 3101 ........................... 2-4
Remote Operator Console ............................ . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-5
Permanent Ringing ............................................................. 2-7
No IBM Copyright Screen on Remote Operator Console .................................. 2-8
No Answer After Correct Password or ............................................... 2-9
No Answer During Console Session ................................................. 2-9
3720 Model 1 or 11 Load Problems If IPL Performed from Host
3-1
3720 Model 2 or 12 Load Problems If IPL Performed from Host 3-3
3720 Modell, 11, 2 or 12 Load Problems If IPL Performed from Disk •••••••••••••••••••••••• 3-S
Line Problems ................................................................. 4-1
CCITT V.24 -Non-Switched Modem Attachment ....................................... 4-3
CCITT V.35 - Modem Attachment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-3
CCITT V.24/V.35 -Direct Attachment ............................................... 4-5
CCITT V.25 Autocall ........................................................... 4-7
CCITT X.21 - Modem Attachment ................................................. 4-9
CCITT V.24 -Switched Modem Attachment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-11
Modem Tests ................................................................ 4-12
Modem and Link Tests ......................................................... 4-13
Token-Ring Interconnection (TRI) Problems ......................................... 4-15
TRI Problem Determination ..................................................... 4-23
Power Check Lamp(s) is On .••.••..•.•••.•••••••.•.•.••.••••••••••.••••••••••••••• 5-1
1\IOSS Inoperative Lamp is On 5-3
Disk Problems ................................................................. 5-5
Contents V

Host Messages 5-7
Information on the Control Program, EC Level, MCF ••••••••••••••••••••••••••••••••••••• 5-9
Information on Disk Control Program
Load Modules, Dump ••••• e e " e " • 0 " " " •••• " ••• ;0 • • • • • •• 5-11
Alarms ...................................................................... 6-1
How to Display an Alarm ........................................................ 6-1
NetView or NPDA V3R2 (VSE) with 3720 PTF Messages ................................. 6-4
NPDA V3 Messages ............................................................ 6-5
VTAM Alerts ................................................................. 6-6
Hexadecimal Codes Displayed on the Control Panel
•••••••••••••••••••••••••••••••••••••• 7-1
Tailgate Wrap Test ............................................................. 8-1
Tailgate Wrap Test Messages ...................................................... 8-7
Console Link Test .............................................................. 9-1
Appendix A. Task-Oriented Bibliography ••••••••••••••••••••••••••••••••••••••••••••• A-I
Tasks to Be Performed: Before Installation ............................................ A-I
Tasks
to Be Performed: During Installation ........................................... A-3
Tasks
to Be Performed: At Integration into the Network .................................. A-4
Tasks to Be Performed: During Operation ............................................ A-5
Abbreviations and Glossary
•••••••••••••••••••••••••••••••••••••••••••••••••••••••• A-7
Index ....................................................................... X-I
VI 3720/3721 Communication Controller Problem Determination Guide

Select the Most
Appropriate
Symptom
Problem Determination Start Page
1 Alarms / NPDA Messages / VTAM Alerts
1 Host Messages
IHexadecimal Codes on the Control Panel
Unable to Power On the 3720
Modell or 11
(Power lamp does not turn on) Model 2
or 12
Unable to Power Off the 3720
Modell or 11
(Power lamp does not tum off) Model 2
or 12
Modell or 11
3720 Drops Power Model 2
or 12
IConsole Problems Local
Remote
3720 Modell or 11
Unsuccessful Load From Host 3720 Model 2
or 12
GO TO
PAGE
16-1
15-7
17-1
1-1
1-11
1-5
1-13
1-7
1-15
2-1
2-5
3-1
3-3
Unsuccessful Load from Disk 3-5
Line Problems 4-1
Token-Ring Interconnection Problems 4-15
Disk Problems 5-5
Power Check Lamp is On 5-1
MOSS Inoperative Lamp is On 5-3
Information on the Control Program, EC Level, MCF 5-9
IInformation on Disk Control Program Load Modules, Dump 5-11
Start Page

bI rr=iI IUnable To Power On the 3720 Model 1 or 11
E1 B ilJ
10 0 0 01
o0 0 _____ _____
IF
HOST
WITH AUTO
POVER ON
LOCAL
NETVOAIC
WITH AUTO
POVER ON
IF WITH~
(._::iI::POVER~LOCAL~ON
NETVDRIC
WITH AlITO
PDVER ON
Go to page 1-2
HOST
WITH Auro
POWER ON
NETVDAIC
WITH AUTO
POVER ON
Go to page 1-3
LOOK AT THE
POWER CONTROL
SWITCH
Check the
Power switch on
the control panel.
Ask host operator
if connected hosts
are powered off.
Check the
Power Check lamp
on the control panel.
Check the customer
circuit breakers.
Check
if there is
power
at the outlet.
If it is on Power Off, set it
to Power On.
If powered off, normal condition.
3720 will be powered on
as soon as at least
one host is powered on.
If on : Go to page 5-1.
If necessary, restore power.
Set Power Control
to LOCAL
Press Power switch to power
Off then On.
Set back Power Control
to HOST.
If none of the above applies:
®> (Go to page viii)
In case of an emergency only:
• Power on the 3720 as follows:
-Set the Power Control switch to LOCAL
-Press General Reset switch
-Press Power switch
to power Off then On
• if the problem persists: ®> (Go to page viii)
Unable to Power On the 3720 Model 1 or 11 1-1