Wang 2246R Manuals

Manuals and User Guides for Wang 2246R. We have 1 Wang 2246R manual available for free PDF download: Hardware Manual

Wang 2246R Hardware Manual (176 pages)

REMOTE STANDALONE WORKSTATION

Brand: Wang | Category: Desktop | Size: 9 MB

Table of Contents
4
Physical Description
13
Related Publications
13
Scope
13
Section 1 - Introduction
13
Bell-System Technical Reference Publications
14
Wang-Published Technical Publications on Telecommunications
14
CRT Assembly
16
Keyboard
16
2246R Remote Workstation, Rear View
17
- 210-7478 Remote Telecommunications Workstation Controller
  19
210-7156 Power Supply Regulators
21
210-7456 CRT Monitor Electronics
21
210-7479 Enhanced Workstation CPU
21
Functional Description
25
- Section 2 - Site Preparation
  28
General
28
Selecting a Location
28
Environmental Considerations
29
Humidity Considerations
29
Temperature Considerations
29
Cleanliness Considerations
30
- Electrical Enviornment Considerations
  31
  - Section 3 - Unpacking & Incoming Inspection
    33
Incoming Inspection
33
Unpacking
33
Removal of Covers from 2246R Remote Workstation
34
- Section 4 - Installation & Initial Setup
  36
- Gen
  36
System Requirements
37
Modem Requirements
38
Installation
40
Installation for Direct/Local Connection
40
Installation for Remote Modem Connection
40
Representative Local (Null-Modem) Interface to VS System
41
- Modem Customer Options
  44
- Data Access Arrangement (DAA) Customer Options
  52
Representative Remote (Multipoint) Interface to VS System
41
General
55
Link Protocol
56
Polling
56
Selection
57
Typical Data-Link Configuration
57
Conversational Reply
58
Flow Control
58
Message Blocking
58
Device Protocol
59
Error Recovery
59
Reverse Interrupt
59
Timeouts
59
Host-Program/Host-Controller Interchanges
60
Loading Host Controller Microcode
60
Loading Polling List
60
Data Link Handshaking for *LOAD-DEVICE Command* Sequence
61
Host-Program/Remote-Controller Interchanges
61
- Loading Remote Device Microcode
  61
LOAD-DEVICE Command
61
Data Link Handshaking for
62
START-DEVICE Command
62
Host-Initiated Commands to Remote Workstations
63
Host-Program/Remote-Device Interchanges
63
Workstation WRITE Command
63
Data Link Handshaking for
64
Workstation WRITE-SELECTED Command
65
5,3,3.1.4 Workstation READ Command
66
Workstation READ-DIAGNOSTIC Command
67
Data Link Handshaking for
68
- Workstation RE:AD-ALTERED Gommand
  70
Workstation READ-TABS Command
68
Data Link Handshaking for *Printer WRITE Command* Sequence
70
Host-Initiated Commands to Remote Printers
71
Request for Attention by Remote Device
72
Command Abortion by Host Program
73
- Modified BNF Notation for Defining Data Formats
  74
General
82
System-Setup Presentation on Command Console Following IPL
83
REMOTE DEVICES Control Presentation
87
- Section 7 - Hardware Theory of Operation
  89
General
89
Telecommunications Data Link Processor (210-7478 Tc/Memory Board)
89
Z8O Cpu
89
Input/Output Architecture
93
Counter/Timer Circuit (CTC)
94
Serial Input/Output (SIO)
94
- Z80 CPU I/0-Port Addresses
  94
Clock Mode Register (CMR)
95
- SIO and Modem Interface Signal Distribution
  95
- DMA Ack~Owledge Lines DACK 0 through DACK
  97
Address Bus Buffer
97
- Address Lines a 0 through a
  97
- Address Lines a 4 through a
  97
Data Bus Buffer
97
- Data Bus Lines D 0 through N
  97
Memory Organization
98
- Multiplexed Memory Addressing
  98
- Multiplex Timing Considerations
  99
User Option Switches
101
VS Single Remote Workstation Controller
101
Workstation Processor
102
- Section 8 - Diagnostics
  104
Equipment Requirements
104
General
104
Operating Procedure
104
Continue-On-Error Mode Testing
106
Selected-Test-Module Mode Testing
106
Error Codes
107
- Diagnostics Test ERROR CODE Readouts
  108
- Section 9 - Preventive Maintenance
  111
General
111
- Section 10 - Adjustments
  113
General
113
- DC Voltage Adjustments
  113
- Video Display Adjustments
  117
Focus
118
Horizontal Phasing Check
118
Horizontal Width Adjustment
118
Vertical Linearity Adjustment
118
Vertical Size Adjustment
118
IC Voltage Test Points
120
Selector Switch Settings
121
General
123
ITS 1 EIA Interface Test Set
123
Section 11 - Troubleshooting
123
General Telecommunications System Troubleshooting Hints
125
Troubleshooting Checklist
126
Checkout of Modem Control Signals
127
Modem Self-Tests
129
Data Set 201C Self-Tests
130
Data Set Status Indicators
130
Data Set Switch Buttons
130
Data Set Analog Loopback Self-Test (2-Wire or 4-Wire Data Sets)
132
Data Set End-To-End Self-Test (2-Wire Data Set)
133
Data Set Switch Buttons
134
Data Set Status Indicators
135
Data Set Analog Loopback Self-Test
137
Data Set Lamp Test
137
Data Set End-To-End Self-Test
138
General
142
- Section 13 - Drawings
  144
Section 12 - Repair Replacement Procedures
142
General
144
- Section 14 - Bill of Materials
  155
General
155

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