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Manuals
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Wang Manuals
Recording Equipment
2228D-4E
Maintenance manual
Wang 2228D-4E Maintenance Manual
Telecommunication controllers
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Contents
Table of Contents
Bookmarks
Table of Contents
Table of Contents
Introduction
Scope & Purpose
General Description
Controller Option
Theory of Operation
Introduction
Z80A Cpu
The 2200 Interface
2200 I/O Bus Signals
Addressing the 2228D Controller
Resetting the 2228D by the 2200
2200 Request Status Register
Parallel Input/Output (PIO) Chip
Clock Mode Register and Internal/External Timing
NRZ /NRZ Interface Mode
Character Recognition
9517-1 - OMA Chip
DMA Multiple EOP/CBS Latch Circuit
DMA Channel 0 and L Requests Latch
Counter Timer Chip (CTC)
Automatic Calling Unit (ACU)
Functional Description of ACU Signals
Synchronous Input/Output (SIO) Chip and
Memory Organization
Multiplexed Memory Addressing
Multiplexed Timing Considerations
Write Bad Parity (Out'71')
Ll LED Status Display (in '70')
Operation
Controls and Indicators
Installation
Parts Required
PROM and RAM Check
Switch Settings /~-1
External Loopback Test (Power-Up)
2228D-(All) Diagnostics/Tests
Power-Up Diagnostics (Description)
Introduction
Program Description
Operation
Field Level Diagnostics
Configuration Requirements
Hardware
Program Descripti'n
Load Procedure
Revision Histor
Loopback Connector Part Numbers
Interconnection with Modems
Optional Cables
Maintenance
Illustrated Parts Breakdown
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- - - - - - -
--~-----------
•
WANG
TELECOMMUNICATION
CONTROLLERS
•
LVP /MVP
Mod~ls:
2228D-4E,
2228D-4A,
2228D-4X
2228D-8E,
2228D-8A,
2228D-8X
SVP Models:
OP28D-4E,
OP28D-4A,
OP28D-4X
OP28D-8E,
OP28D-8A,
OP28D-8X
7301
•
Customer Engineering
Product Maintenance Manual
729-1305-A
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This manual is also suitable for:
2228d-4a
2228d-4x
2228d-8e
2228d-8a
2228d-8x
Op28d-4e
...
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Op28d-4a
Op28d-4x
Op28d-8e
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