Wang 2436DW User manual

'
-WANG,
3401
2436DW/DE INTERACTIVE TERMINAL
Custcmer Engineering
Product Maintenance Manual
COMPANY CONFIDENTIAL
741-1727

PREFACE
This document is the Illustrated Product Maintenance Manual for the Wang
2436DW/DE Interactive Terminal. The scope of this manual reflects the type of
maintenance philosophy selected for this product (swap unit, printed circuit
assembly, power supply, or any combination thereof).
The purpose of this manual is to provide instructions to operate, trouble-
shoot, and repair the 2436DW/DE Interactive Terminal. It will be updated on a
regular schedule.
First Edition (April, 1986)
This is the first edition of the Wang 2436DW/DE Product Maintenance Manual.
The material in this document may only be used for the purpose stated in the
Preface. Updates and/or changes to this document will be published as PUBs or
subsequent editions.
®Copyright 1986 by WANG Laboratories, Inc.
741-1727 Page ii COMPANY CONFIDENTIAL

CUSTOMER ENGINEERING
PUBLICATION UPDATE BULLETIN
TITLE: 2436 DW/DE Interactive Terminal
This PUB affects: 741-1727
742-1727
Previous Notice(s): None
REASON FOR CHANGE:
DATE: 04/02/87
CLASS CODE: 3401
This PUB corrects and adds part numbers. It also adds the switch settings
for even parity and 7 data bits.
INSTRUCTIONS:
Remove and insert attached pages and/or microfiche as follows:
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This page constitutes a permanent record of revisions; place it directly
following title page.
WANG
LABORATORIF'S INC
ONE INDUSTRIAL AVENUE LOWELL MASSACHUSETTS 01851 TEL [phone] TWX 110 343 6169 TELEX 94 7421
PRINTED IN U.S.A.
COMPANY CONFIDENTIAL
741-1727-1

COMPANY PROPRIETARY STATEMENT
This document is the property of Wang Laboratories, Inc. All
information contained herein is considered Company Proprietary,
and its use is restricted solely to assisting you in servicing
Wang products. Neither this document nor its contents may be
disclosed, copied, revealed, or used in whole or in part for any
other purpose without the prior written permission of Wang
Laboratories, Inc. This document must be returned upon request
of Wang Laboratories, Inc.
©Copyright 1987, Wang Laboratories, Inc.
COMPANY CONFIDENTIAL

TABLE OF CONTENTS
SECTION 1
INTRODUCTION
Page
1.1 SCOPE AND PURPOSE -------------------------- ·--------------- 1-1
1.2 ORGANIZATION AND LAYOUT ---------------------------------- 1-2
SECTION 2
IDENTIFICATION
Page
2.1 MAJOR ASSEMBLIES -------------------------------------------- 2-1
2.2 ELECTRONICS BASE UNIT MAJOR PARTS ·---------------------- 2-2
SECTION 3
CONTROLS AND INDICATORS
Page
3.1 OPERATOR CONTROLS __________________________________________ 3-1
3.1.1 Electronics Base Unit Front Panel Controls ________________________ 3-1
3.1.2 Electronics Base Unit Rear Panel Controls_________________________ 3-2
3.1 .3 Video Monitor Front Panel Controls ______________________________ 3-3
3.1.4 Keyboard Controls _______________________________________________ 3-4
741-1727 Page iii COMPANY CONFIDENTIAL

----~~-- -----------------
TABLE OF CONTENTS
SECTION 4
OPERATION
Page
4.1 POWER-UP AND 8.1.T. DIAGNOSTIC PROCEDURE _______________ 4-1
4.2 POWER-DOWN PROCEDURE ------------------------------------- 4-2
SECTION 5
PREVENTIVE MAINTENANCE
Page
5.1 MATERIALS REQUIRED ------------------------------------------ 5-1
5.2 PM SCHEDULE --------------------------------------------------- 5-2
5.3 CLEANING ,L\ND INSPECTION ----------------------------------- 5-3
S.4 CHECKS AIND ADJUSTMENTS ----------------------------------- 5-4
741-1727
Page iv COMPANY CONFIDENTIAL

TABLE OF CONTENTS
SECTION 6
TROUBLESHOOTING
Page
6.1 TOOLS AND EQUIPMENT---------------------------------------- 6-1
6.2 TROUBLESHOOTING FLOWCHARTS ______________________________ 6-2
6.3 DIAGNOSTICS ____________________________________________________ 6-6
6.3.1 Power-up Diagnostics ____________________________________________ 6-6
6.3.2 Power-up Error Codes ------------------------------------------- 6-7
6.3.3 Power-up and Screen Alignment __________________________________ 6-8
6.3.4 Power-up and Burn-In Mode -------------------------------------- 6-9
6.3.5 Keyboard Test ---------------------------------------------------- 6-10
6.3.6 Diagnostic Override ---------------------------------------------- 6-11
SECTION 7
REPAIR
Page
7.1 TOOLS AND TEST EQUIPMENT----------------------------------- 7-1
7.2 REMOVAL PROCEDURES ----------------------------------------- 7-2
7.2.1 Electronics Base Unit Cover Removal ·----------------------------- 7-2
7.2.2 Base Unit Power Supply Removal---------------------------------- 7-3
7.2.3 Base Unit Printed Circuit Board Removal __________________________ 7-4
7.2.4 Monitor Video Printed Circuit Board Removal ______________________ 7-5
741-1727
Page v COMPANY CONFIDENTIAL

TABLE OF CONTENTS
SECTION 8
ADJUSTMENTS Page
8.1 TOOLS AND EQUIPMENT----------------------------------------- 8-1
8.1 .1 Special Tools ______________________________________________________ 8-1
8.2 ELECTRICAL ADJUSTMENTS-------------------------------------- 8-2
8.2.1 Electronics Base Speaker and Keyboard Clicker. ____________________ 8-2
8.2.2 Video Monitor Printed Circuit Board-------------------------------- 8-3
SECTION 9
UNPACKING AND SETUP Page
9.1 INSTALLATION SITE CHECK-------------------------------------- 9-1
9.2 TOOLS AND TEST EQUIPMENT ----------------------------------- 9-2
9.3 UNPACKING PROCEDURES --------------------------------------- 9-3
9.3.1 Unpacking and Inspecting Electronics Base _________________________ 9-3
9.3.2 Unpacking and Inspecting Monitor--------------------------------- 9-4
9.3.3 Unpacking and Inspecting Keyboard-------------------------------- 9-5
9.4 SWITCH SETIINGS _________________________________________________ 9-6
9.4.1 Electronics Base Line Voltage Select Switch ________________________ 9-6
9.4.2 Electronics Base Baud Rate Select Switch __________________________ 9-7
9.5 CONNECTIONS --------------------------------------------------- 9-8
9.5.1 Terminal Rear Panel Connections __________________________________ 9-8
9.6 VOLTAGE CHECKS ------------------------------------------------ 9-9
9.6.1 Power Supply DC Voltage Checks _________________________________ 9-9
741-1727
Page vi
COMPANY CONFIDENTIAL

TABLE OF CONTENTS
SECTION 10
FUNCTIONAL DESCRIPTION
Page
10.1 INTRODUCTION ___________________________ - __ --- ___ - ___ -________ 10-1
10.2 BLOCK DIAGRAM DESCRIPTION-------------------------------- 10-2
11.1 EQUIPMENT
SECTION 11
SPECIFICATIONS
SECTION 12
ILLUSTRATED PARTS
Page
11-1
Page
12.1 MAJOR ASSEMBLIES-------------------------------------------- 12-1
12.1 .1 System Components ____________________________________________ 12-1
12.1.2 Electronics Base Assembly .______________________________________ 12-2
741-1727 Page vii COMPANY CONFIDENTIAL

SECTION 1 CONTENTS
SECTION 1
INTRODUCTION
Page
1.1 SCOPE AND PURPOSE ------------------------------------------ 1-1
1.2 ORGANIZATION AND LAYOUT ---------------------------------- 1-2
741-1727 COMPANY CONFIDENTIAL

1 .1
Scope and Purpose
This manual contains installation, oper-
ation, troubleshooting, and repair infor-
mation for the 2436DW/DE Interactive
Terminal, a low cost workstation desig-
ned to communicate and control the
Wang 2200 MicroVP computer system.
The manual also contains a functional
description of the 2436DW/DE and an
illustrated parts breakdown of replace-
able parts. Model DW of the 2436 is
capable of both data processing and
word processing. Model DE performs
data processing only. For simplicity,
the 2436DW is described in this
manual. The information, however,
applies to the 2436DE as well.
The purpose of this manual is to pro-
vide
1
~ustomer Engineering personnel
with the information necessary to
install, troubleshoot, and repair the
Terminal in the field. Familiarity with
word processing and office information
systems is recommended for effective
use of this manual.
741-1727 Page
1-1
INTRODUCTION
COMPANY CONFIDENTIAL

1.2 Organization and Layout
The manual is divided into 12 sections
numbered 1 through 12. Each section
describes a separate maintenance
subject and is arranged to minimize ref-
erences to other sections. Referencing
to other sections is made by means of
a hand symbol ( lllr )followed by the
section being referenced. Also, all or
most of the information pertaining to a
specific task is located on a single
frame. Each frame, in turn, contains
illustrations, numbered steps, and/or
text describing the individual steps
required to accomplish each task. Each
section is preceded by a section number
and a section table of contents. The
sections and the corresponding frames
are arranged in numerical sequence from
left-to-right and from top-to-bottom on
the individual fiche cards.
741-1727 Page 1-2
INTRODUCTION
COMPANY CONFIDENTIAL

SECTION 2 CONTENTS
SECTION 2
IDENTIFICATION
Page
2.1 MAJOR ASSEMBLIES -------------------------------------------- 2-1
2.2 ELECTRONICS BASE UNIT MAJOR PARTS ·---------------------- 2-2
741-1727 COMPANY CONFIDENTIAL

IDENTIFICATION·
2 .1
Major Assemblies
VIDEO MONITOR
\
741-1727 Page
2-1
COMPANY CONFIDENTIAL

2.2 IDENTIFICATION
Electronics Base Unit Major Parts
CPU PRINTED CIRCUIT ASSEMBLY SWITCHING POWER SUPPLY
741-1727 Page 2-2 COMPANY CONFIDENTIAL

I

3.1
3.1.1
3.1.2
3.1.3
3.1.4
741-1727
SECTION 3 CONTENTS
SECTION 3
CONTROLS AND INDICATORS
Page
OPERATOR CONTROLS __________________________________________ 3-1
Electronics Base Unit Front Panel Controls________________________ 3-1
Electronics Base Unit Rear Panel Controls_________________________ 3-2
Video Monitor Front Panel Controls ______________________________ 3-3
Keyboard Controls _______________________________________________ 3-4
COMPANY CONFIDENTIAL

CONTROLS AND INDICATORS
3 .1
Operator Controls
3.1.1
Electronics Base Unit Front Panel Controls
Item Name
Type/Function
1 _____ Power On Switch ____ AC power rocker-type switch. Pressing
11
1"
applies ac power to base unit which energizes
all Terminal assemblies. Pressing
11
0
11
removes
ac power from base unit and de-energizes all
assemblies.
741-1727 Page
3-1
COMPANY CONFIDENTIAL