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.
*
*
*
*
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
• 2
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
ii
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)
1-1

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.
1-2
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III.D.lM-3
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 •
1-3

III.D.1M-3
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FIGURE 1-1 2336 TERMINAL
1-4

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lII. D. lM-3
1. 5.1
CRT DISPLAY
The '.2336DW terminal contains a 12-inch ( 30. 5 centimeter) di'lgonally
measured cathode ray tube (CRT) screen display. The CR'l' displays a f~111
128-character set, including uppercctse and lowercase keyboard charc1.cters, some
foreign language characters, special symbols, and underlining. The CRT also
displays an alternate set of graphic characters and box graphics. All
characters may be displayed using one or more of several character display
attributes.
The CRT has a 24-line, 80 characters/line capacity (l,920 character
positions) for ~ull-screen operator prompting and verification of keyed
characters. Brightness and contrast controls provide a sharp clear image on
the screen. Display speed is approximately 2,000 charactecs/second at a
19,200 baud. A cursor, resembling an underscore, indicates the location on
the display where the next character will appear. In addition to controlling
cursor movement and positioning from the keyboard, a number of codes can be
used to manipulate the cursor under program control for specially formatted
displays.
1.5.2 KEYBOARDS
1.5.2.1 General
The typewriter keyboard which can generate 88 different ASCII characters,
including uppercase and lowercase letters, numbers, and symbols. It also
includes a numeric keypad, several program control keys, and 18
program-definable special function keys: 16 numbered keys along the top of
the keyboard, and the TAB and GL keys located in the alphanumeric keyboard
zone. Each special function key can be used with the SHIFT key for a total of
36 special function keys. The keyboard also contains editing keys (INSERT and
DELETE), location keys (NEXT SCRN and PREV SCRN), and cursor control keys
(controls movement of cursor in indicated direction -- up, down, right, and
left).
1.5.2.2 Standard Keyboard
The 2336DW terminal is equipped with a new combination keyboard which
features the conventional typewriter format plus a numeric keypad as well as
cursor control, editing and special function keys normally associated with
Wang Word Processing systems.
1.5.2.3 Expanded Keyboard. The expanded (international) keyboard has the
same features as the standard keyboard plus an additional four keys needed to
meet international requirements •
1-5

Ill. D.lM-3
1.5.3 CPU INTERFACE
The 2236MXD and 22C32 '!'C controller PCBs are part of the 2200 system main
frame and interface between the 2200 CPU and the 2336DW terminals. The
2236MXD can support 4 terminals. The 22C32 Triple Controller supports a
single terminal. The 2336DW plugs directly into the ter.minal controller PCB.
No additional controllers are necessary.
1.6 SPECICIFICATIONS
Size
Height
Depth
Width
Weight
CRT
Character Set
28. 0 lb
(12.7 kg)
Display Size
Capacity
Character Height
Character Width
15.0
12.8
13.5
in.
(38.l
cm)
..i.n•
(32.5
cm)
in. (34.3 cm)
12 in. diagonal (30.5 cm)
24 lines, 80 characters/line
0.16 in. (0.41 cm)
0.09 in. (0.23 cm)
128 characters, including uppercase and lowercase letters; each character is
assigned one or more attributes for high- or low-intensity display, reverse
video, blinking, or underlining. Additional alternate character set
consisting of 64 graphic characters and other special symbols is supplied.
Also capable of displaying line-segment (box) graphics, separate from either
character set.
Operating Environment
Temperature
50°F to 80°F (10°C to 30°C)
Relative Humidity
35% to 65% noncondensing (recommended)
20% to 80% noncondensing (allowable)
1-6
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Power Requirements
115 or 230 Vac + 10%
50 or 60 Hz + l.O Hz
50 Watts
Communication Mode
Asynchronous, full-duplex
Transmission Rates
ur.u.lM--J
Manually selectable for each terminal at 300, 600, 1200, 2400, 9600, or
19.2K baud
Character Format
When commun~cating with a 2200MVP, LVP, SVP, or VP system:
1 start bit, 1 stop bit
8 data bits, plus odd parity (11 bits/character)
Other selectable character formats:
8 data bits, no parity
7 data bits, odd parity
7 data bits, even parity (10 bits/character)
EPROM Complement
LS - 378-5080-2
L9 - 378-6013-2
LlO - 378-6014-2
Character Generator
Terminal Microcode
Terminal Microcode
1-7

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III.D.lM-3
SECTION 2
RECEIVING AND INSPECTION
This section contains the information necessary to unpack and inspect the
2336DW Terminal.
2.1 INCOMING INSPECTION
When the equipment arrives, immediately locate the packing slip and note
the work order number. Verify the equipment model and serial number as listed
on the packing slip.
Before opening the containers, inspect them carefully for signs of damage
(crushed edges, puncture holes, tears, etc.). Should dama~e be noted,
promptly file a claim with the carrier and notify the factory:
WLI DISTRIBUTION CENTER
Department #90
Quality Assurance Department
Tewksbury, MA 01876.
State the nature and extent of damage and make arrangements for
replacement equipment, if necessary. Be certain to include this information:
WORK ORDER #
-------
CUSTOMER NAME CUSTOMER #
-----~ -----
MODEL #
------
SERIAL #
-----
2.2 PACKING AND UNPACKING
2336DW terminals are packaged in two cardboard containers with special
packing material for protection during shipping. The CRT and keyboard are
packaged separately. Circuit boards and other components are installed at the
factory •
2-1

III.D.lM-3
2.3 TERMINAL INSPECTION
Remove the terminal cover as follows:
a. Stand at the rear of the unit, remove the Phillips-head screws , one
on each side of the rear of the CRT unit. Place both hands on the top of the
CRT unit, push the cover back along the side tracks, and lift it from the
unit. Set the cover aside. Avoid scratching the surface.
Perform a careful internal inspection of the CRT unit. Look for broken or
shifted boards or other components, and wiring, screws, or hardware that might
have come loose during shipment. Revision levels of particular PCBs used in
the 2336DW should be verified as specified in section 1.
2-2
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III.D.lM-J
SECTION 3
INSTALLATION
This Section describes terminal installation procedures.
3.1 Physical Assembly and Checks
Follow the instructions given in this section to connect the 2336DW
terminal to the 2200 system. Refer to Figure 3-1 for cable connections.
a. Remove the CRT module cover by removing the the two screws on the
rear of the unit. (figure 3-2) Remove packing insert.
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.
*
*
*
*
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 DRAI THROUGH THE *
*
* *
*
************************************************************
BLEEDER RESISTORS.
b. Remove the label from the ac input connector and verify that it
corresponds to the actual voltage (115/230v) selection on the
switching power supply (figure 3-3).
c. Connect and secure the keyboard assembly.
d. Locate the POWER switch on the rear panel of the CRT module and
insure that the switch is in the OFF (0) position.
e. Insert the terminal ac power cord into the appropriate connector
on the rear panel of the CRT module.
f. Insert the terminal ac power cord into an appropriate outlet. DO
NOT USE AN EXTENSION CORD. Turn the POWER switch ON (1).
g. Refer to section 6 and perform the indicated power supply voltage
checks (6.2.1) and CRT display voltage checks (6.2.2).
3-1

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nr.D.lM-3
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h. Turn the terminal AC power switch OFF (O).
NOTE
Burn-in diagnostics can be run at this
time if desired. Refer to section 7,2.1
for instructions.
i. Connect the RS-232 cable (P/N 120-2236-25) between the RS-232
connector on the terminal and the RS-232 connector on the 2200
communications port.
j. Set the baud rate switches for 19.2K in accordance with figure
3-4.
k. Each 2336DW terminal is connected to either a 2236MXD Terminal
Processor or a 22C32 Triple Controller when configured with a
2200 Central Processing Unit. Existing controllers must be
revised to current standards to support the 2336DW terminal as
follows:
1. Change the two PROMs on PCB 210-7516-A
FROM
378-4092
378-4093
TO
378-4092-Rl
378-4093-Rl
2. Change the two PROMs on PCB 210-7789-A
FROM
378-4092
378-4093
3. Change
FROM
the
378-2140-R06
378-2141-R06
378-2142-R06
378-2143-R06
4.
Change
the
FROM
378-2591
378-2449
378-2450
378-2451
four
four
TO
378-4092-Rl
378-4093-Rl
PROMS on PCB
TO
378-2140-R07
378-2141-R07
378-2142-R07
378-2143-R07
PROMs on PCB
TO
378-2591-Rl
378-2449-Rl
378-2450-Rl
378-2451-Rl
210-7591-A
210-7816-A
NOTE: The above changes do not affect other CPU peripheral devices; ie.,
all previously supported devices remain compatible after the changes.
3-2
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