Wang 2336DW User manual

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·WANG
III.D.lM-3
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CUSTOMER ENGINEERING
PRODUCT MAINTENANCE MANUAL
2336DW INTEGRATED
TERMINAL
NOTICE
"This document and the information it contains are the confidential prop-
erty of, and are propietary to, Wang Laboratories, Inc. This document
and the information it contains may not be made public without the writ-
ten consent of Wang Laboratories, Inc. If for any reason this document is
permitted by Wang to leave the physical custody of the company, it is re-
turnable upon the demand of Wang Laboratories, Inc."
COPYRIGHT@WANG I.ABS., INC. APRIL 1982
APRIL 1982
REORDER NUMBER
741-1087

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WARNING
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DO NOT OPEN THE SWITCHING POWER SUPPLY UNDER ANY *
CIRCUMSTANCE. EXTREMELY DANGEROUS VOLTAGE AND *
CURRENT LEVELS (IN EXCESS OF 300 VOLTS DC AND UN- *
LIMITED CURRENT) ARE PRESENT WITHIN THE POWER SUPPLY. *
DO NOT ATTEMPT TO REPAIR THE SWITCHING POWER
SUPPLY; IT IS FIELD REPLACEABLE ONLY.
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AFTER POWERING THE UNIT DOWN AND DISCONNECTING THE AC *
POWER PLUG FROM THE WALL OUTLET, ALLOW ONE MINUTE *
BEFORE REMOVING THE POWER SUPPLY TO PROVIDE ADEQUATE *
TIME FOR ANY RESIDUAL VOLTAGE TO DRAIN THROUGH THE *
BLEEDER RESISTORS. *
* *
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III.D.lM-3
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TABLE OF CONTENTS
Section
1
INTRODUCTION
1.1
Scope
1-1
1.2
Purpose
1-1
1.3
Options
1-1
1.4
Related
Documentation
1-1
1.4.1
Diagnostics
1-1
•.
1.4.2
Revision Levels
1-2
1.4.3
other
1-2
1.5
Description
1-2
1.5.l
CRT Display
1-5
1.5.2
Keyboards
1-5
1.5.3
CPU Interface
1-6
1.6
Specifications
l-6
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RECEIVING AND
INSPECTION
2.1
Incoming Inspection
2-1
2.2
Packing and Unpacking
2-1
2.3
Terminal Inspection
2-2
3
INSTALLATION
3.1
Physical
Assembly and Checks
3-1
4
OPERATION
4.1
Indicators
and Controls
4-1
4.1.1
CRT Module
4-1
4.1.2
Keyboards
4-1
4.2
Operating Features
4-7
4.2.1
Screen Dump
4-7
4.2.2
Display Variations
4-8
5 THEORY
OF OPERATION
:.
5.1
Terminal
Control PCB
5-1
5.1.1
Z-80 CPU
5-1
5.i.2
CTC
5-3
5.1.3 Memory
5-3
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Section
6
7
8
9
5.1.4
5.1. 5
5.1.6
5.1. 7
5.1.a
5.1.9
5.1.10
5.2
5.2.1
CRT Control
Communications
Keyboards
Status
I/O Control
Printer
Control Register
Terminal Controllers
Controller Switch Settings
PREVENTIVE MAINTENANCE AND ADJUSTMENTS
6.1
6.1.1
6.2
6.2.1
6.2.2
6.2.3
Preventive Maintenance
General
Adjustments
Power Supply Volta~e Checks
PCB 7456 CRT Display Voltage Checks
PCB 7456 CRT Display Alignment Checks
DIAGNOSTICS AND TROUBLESHOOTING
7.1 Troubleshooting
7.1.1 General
1.2
1.2.1
1.2.2
1.2.3
1.2.4
1.2.5
1.2.6
Power-up and Burn-in Diagnostics
Description
Load Procedure
Operating Procedure
Error Code Definitions
Loopback Connector
Keyboard Hex Codes
REMOVAL AND REPLACEMENT
0.1
0.2
0.2.1
a.2.2
0.2.3
0.2.4
0.2.5
8.2.6
General
Sub-assembly Removal and Replacement
CRT Discharge Procedure
7743 PCB
Power Supply
CRT Chassis
CRT Rear Panel
7456 PCB
ILLUSTRATED PARTS BREAKDOWN
APPENDICES
A
B
c
Recommended Spares List
Direct and Modem Cable Part Numbers
Schematic Diagrams
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5-4
5-7
5-7
5-8
5-9
5-10
5-10
5-10
5-11
6-1
6-1
6-2
6-2
6-3
6-3
7-1
7-1
7-5
7-5
7-6
7-6
7-7
7-7
7-8
8-1
8-1
8-1
8-2
8-2
8-3
8-3
8-4
9-1
;..-1
B-1
e-1
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III. D. lM-3
• LIST
OF FIGURES
Title
Number
Page
1-1
2336DW Terminal
1-4
3-1
Terminal Cable Connections
3-3
3-2
Terminal Rear Panels
3-4
3-3
115/230 Switch Location
3-5
3-4
Baud Rate Switch Settings
3-6
4-1
Brightness and Contrast Controls
4-4
4-2
Standard Keyboard
4-5
4-3
Expanded Keyboard
4-6
4-4
Normal Character Set
4-13
4-5
Alternate Character Set
4-14
4-6
Character Set Division
4-15
4-7
Box Graphics Line Placement/Character
Position
4-19
4-8
Box Graphics Line Placement/Graphic
Character Set
4-19
5-1
2336 Block Diagram
5-2
6-1
Power Supply Voltage Adjustments
6-4
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6-2
7456 PCB Adjustments
6-5
7-1
2336DW Troubleshooting Flowchart
7-2
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III.D.lM-3
2336DW INTEGRATED
TERMINAL
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III.U.lM-3
SEC'rION 1
INTRODUCTION
1.1 SCOPE
This Product Maintenance Manual describes the 2336DW Integrated Terminal.
It is intended for use by qualified Customer Engineering personnel.
Familiarity with Wang 2200 product line equipment is an essential prerequisite
to proper use of this document.
1.2 PURPOSE
This manual provides the information necessary to:
a. Unpack and install each terminal
b. Perform alignment, adjustment, and diagnostic tests
c. Perform basic operation
d. Perform preventive maintenance
e. Perform troubleshooting and fault diagnosis
f. Perform Removal/Replacement procedures of major sub-assemblies
l.J OPTIONS
Each 2336DW is available with either the standard or the expanded
(international) keyboard. The two configurations are as follows:
MODEL
PART NO.
2336DW
177-2336
2326DW
177-2326
KEYBOARD NO. DESCRIPTION
725-2637 STD 2336DW Integrated Terminal with standard
keyboard
725-2652 EXP 2336DW Integrated Terminal with expanded
keyboard.
1.4 RELATED DOCUMENTATION
1.4.1 DIAGNOSTICS
There are two types of diagnostics employed by the 2336DW terminal.
Power-up and burn in diagnostics (documentation release 9230) are PROM based
and installed on the control board. System diagnostics for the 2200 are also
available to those who are familiar with loading and operational procedures.
a. Burn-in and Power-up diagnostics are described in section 7 •
b. 2200 system diagnostics are described in the Diagnostic Handbook
(P/N not available at this time)
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III.o.lM-3
1.4.1.1 Hardware and Software Heviaion Levels
This manual contains valid information for systems with the 7743 board at
revision level 3, the 7456 board at revision level 12 and 2200 software at a
level of 2.3 for MVP/LVP models and 2.5 for SVP/VP models.
1.4. 2 HARDWARE MANUALS
2200 Maintenance Manual - 03-0071-1
OTHER
Corporate Publications Literature Catolog -P/N 700-5294C
1.5 SYSTEM DESCRIPTION
The 2336DW is a two-piece terminal consisting of a CRT display/
electronics module and a detachable keyboard, see figure 1-1. The key
ergonomic features of the 2336DW design are a tilting CRT assembly and a
detached keyboard. This terminal is Z80-based and consists of a 12-inch
diagonally measured CRT, a capacitive-type keyboard, a 12-inch monitor sweep
PCB (P/N 210-7456), a switching power supply (P/N 270-0734), and a control PCB
(P/N 210-7743-A).
The 2336DW is an enhancement of the 2236DW. It offers the same features
of the 2236 plus the added flexibility of a detachable keyboard. The terminal
features include:
Word Processing style cursor control and function keys which support
the integrated word processing and data processing functions
Repeating keys and underlined characters
Character display attributes including bright, blinking, and.
underlined characters plus reversed video
Graphics character set
Box graphics
Interface to local printer independent of the CPU
Self-test diagnostics
The 2336DW terminal can be attached locally to the 2200MVP or LVP CPU at
distances up to 2000 feet (606.l meters), or remotely via modems and telephone
lines. Terminals connected to a 2200SVP or VP CPU can be attached locally at
a maximum distance of 50 feet (15.2 meters) and 2000 feet (606.l meters)
respectively. Communication between the terminal and the CPU is asynchronous
and full-duplex, with selectable line speeds ranging from 300 to 19,200 bits
per second (bps). To accelerate communications between the terminals and the
CPU, the system performs automatic data compression on information transmitted
to each terminal.
Each terminal can support its own terminal printer which can be used for
program output. Additionally, hard copy of CRT displays can be created at
each terminal site. A dump of the display screen to the terminal printer may
be initiated from the keyboard, resulting in th~ printing of all standard
characters present on the screen. The screen dump feature requires no special
software and can be performed at any time.
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The 2336DW and its controller employ microprocessors to optimize data
throughput. For example, strings of four or more identical characters are
compressed for transmission into 3-byte blocks. A ready/busy protocol
controls information flow between the terminals and the terminal processor.
Thus, it is unnecessary for the attached printer to keep up with the serial
communication line data rate. These features are automatic and are completely
transparent to the 2200 CPU software •
As an added feature, the 2336DW performs self-test diagnostics every time
it is turned on. These diagnostics ensure optimum terminal conditions before
use. If the unit fails one of the tests, a continuous alarm sounds, alerting
the user to the failure. The tests allow a Wang customer service
representative to quickly identify the problem and minimize downtime.
Any standard Wang printer or plotter with a 36-pin cable connection may be
plugged into the printer connector on the terminal. A Wang supplied
direct-connection cable or an optional modem cable plugs into an RS-232-C
compatible connector on the terminal •
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