Bytec Hyperion User manual

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MAINTENANCE MANUAL
C Part Number: 650000-000
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.B:YTEC MANAGEMENT CORP
(C) 1983

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Federal Communications Commission Compliance
The Hyperion is subject to Federal Communications Commis-
sion (FCCl rules.
The Hyperion has been tested and found to
comply
with the limits of Class B computing devices in accord-
ance
with the specifications in Subpart J of Part 15 ofFCC rules .
The Hyperion has Canadian Standards Association (CSA)
approval,
and conforms to the Government of Canada Telecom-
munications Interconnection Requirements (CS-03l.
UL#86H2
CSA LR33921-6
FCC
!dent . CTJ7YM3000
FCC Regist. CTJ7YM-704333-DT-E
(Cl Copyright -Bytec Management Corp.
1983
All
Rights Reserved
Published by: BYTEC MANAGEMENT CORP.
8 Colonnade Road
Ottawa , Ontario
K2E 7M6
01 April 1983

Warranty
The Dynalogic Info-Tech Corporation warrants this Dynalogic
Personal Computer Product to be in good working order for a
periodofone
year from the date ofpurchasefrom DYNALOGIC
or
an Authorized Dynalogic Computer Dealer. Should this pro-
duct fail to be
in good workingorder at any time during this one
year warranty period, DYNALOGIC will, at its option, repair or
replace
this product at no additional charge except as set forth
below.
Repair parts and replacementProductswill be furnished
on
an exchange basis and will be either reconditioned or new.
All replaced parts and products become the property of
DYNALOGIC. Thislimited
warranty does not includeserviceto
repair damage to the Product resulting from accident, disaster,
misuse, abuse, or non-Dynalogic modification of
the Product.
Disclaimer
The information in this manual has beencarefullypreparedand
checked for completeness
and accuracy. There is, however, al-
ways
the possibility ofomission or error. In such event, Bytec
cannot assume liabilityfor any damages resulting from the use
of
this manual.
Warning
Circuit boards damaged by attempting IC replacement shall
result in reduction or cancellation of return credits or voidance
of
the warranty.
Trademarks
ii
HYPERION is a trademark of Hyperion Division of Bytec.
MS-DOS is a
trademark of Microsoft Corporation.
IN:TOUCH
is a trademark of Hyperion Division of Bytec.

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Contents
Chapter 0 FCC Compliance/Edition
(i)
Warranty
(ii)
Contents
(iii)
List of Illustrations
(iv)
Chapter 1 Introduction
Chapter 2 Block Diagrams
Chapter 3 Fault Analysis Charts
Chapter 4 Removal and Replacement Procedures
Chapter 5 Parts List
Chapter 6 Preventative Maintenance
Chapter 7
Packing and Shipping
Chapter 8 Disk Drive and CRT Adjustments
Chapter 9 Specifications
list of Appendices
Appendix "A"
Appendix "B"
Appendix "C"
Diagnostic
Program Diskettes
Part Number: 740003-000-00
740020-000-00
Loop
Back Plugs
Part Number: 200038-000-00
200039-000-00
CRT
Alignment Mask
Part Number: 200079-000-00
iii

list of lliustrati.ons
iv
Figure 2-1 Hyperion Block Diagram
Figure 2-2 System Board Block Diagram
Figure 2-3 Display & 1/0 Board Block Diagram
Figure 2-4 Modem Board Block Diagram
Figure 3-1 Power Harness Voltages
Figure 3-2 CRT Display Quality
Figure 3-3 Character Set Diagnostics
Figure 3-4 Attributes Diagnostics
Figure 3-5 Low Resolution Diagnostics
Figure 3-6 High Resolution Diagnostics
Figure 3-7 Character Set Diagnostics REVOl
Figure 3-8 Attributes Diagnostics REVOl
Figure 3-9 Low Resolution Diagnostics REVOl
Figure 3-10 High Resolution Diagnostics REVOl
Figure 3-11 Attributes Diagnostics 40 Character
Mode REVOl
Figure 3-12 Serial Port Loop Back Plug
Figure 3-13 Parallel Port Loop Back Plug
Figure 3-14 Modem Diagnostics
Figure 4-1 Keyboard Removal
Figure 4-2 Keyboard PCB Removal
Figure 4-3 Housing Removal

Figure 4-4 Modem Board Removal
Figure 4-5 Board Assembly Removal
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Figure 4-6 Disk Drive Removal
Figure 4-7 Power Supply Removal
Figure 4-8 Discharging CRT Anode
Figure 4-9 Speaker Removal
Figure 4-10 Fan Removal
Figure 5-1 Hyperion Assembly (External)
Figure 5-2 Hyperion Assembly (Internal)
Figure 5-3 Keyboard Assembly
Figure 8-1 Disk Drive Test Points
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Figure 8-2 Motor Speed Adjustment Resistor
Figure 8-3
Track 00 Waveform
Figure 8-4 Head Azimuth Waveform
Figure 8-5 Radial
Alignment Waveform
Figure 8-6 Radial
Alignment Adjusting Set
Screw
Figure 8-7 CRT Board Adjustment Locations
Figure 8-8 60 HZ CRT Test Pattern
Figure 8-9 70 HZ CRT Test Pattern
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CHAPTER 1
INTRODUCTION

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Maintenance Manual
Introduction
1.0 Introduction
The Hyperion portable computer is a powerful 16-bit micro-
computer with full graphics and optional built in telecom-
munications capability. Most of the advanced circuitry is con-
tained on two densely populated multi-layer printed circuit
boards, which
makes the Hyperion one of the smallest and
easiest computers to repair.
This manual is intended to assist in isolating problems to the
sub-assembly level, then to provide factory approved removal
and replacement techniques. The Diagnostic Diskettes are used
with the Fault Analysis Charts (FACs) in Chapter 3, to provide
rapid fault isolation. The two diskettes contain the same prog-
rams, however, they are used with different revisions of
computer. Refer to Chapter 3 for details of which diskette to use
with each revision. The removal and replacement techniques
will
assist in correcting problems and provide for testing to
verify
fault correction (Chapter 4).
A Bytec
Hyperion Maintenance Course is available to autho-
rized
dealer technicians. This courseprovidesdetailedtechnical
information and hands-on repair experience. Anyone attemp-
ting repair of the Hyperion without benefit of the course is
encouraged
to seek technical assistance from the nearest autho-
rized dealer.
Throughout this manual various types of precautionary in-
formation is included:
Warning A WARNING indicates that procedures detailed
could cause personal injury or serious equipment
damage if suitable precautions are not taken.
Caution A CAUTION indicates that minor damage may re-
sult if suitable precautions or normal work practices
are not taken.
Note A NOTE indicates steps to be taken to make the
particular procedure easier to carry out.
1-1

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CHAPTER 2
BLOCK DIAGRAMS

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Maintenance Manual Block Diagrams
2.0 Hyperion Block Diagrams
Complete System (Fig. 2-1)
The System Block Diagram illustrates the relationship between
the System Board and the Keyboard, DiskDrives,Speaker, Fan,
Display and I/0 Board, Display Unit, and Modem Board.
System Board (Fig. 2-2)
The System Board contains the DRAM, System Clock, CPU,
EPROM,
and the DMA and Floppy Disk Controller. The Boot
Strap Program and Hyperion-On-Self-Test (HOST) Programs
are stored on the system EPROM.
Display and 1/0 Board (Fig. 2-3)
The Display and I/0 Board contains the Real Time Clock, out-
puts and inputs to the CRT, Modem and Parallel/Serial
interface .. The CRT enhancement circuitry for alpha/graphics
plus the Video Driver are located on this board. The optional
Modem
Board plugs into the Display and I/0 Board in piggy-
back fashion.
Modem Board (Fig. 2-4)
The Modem Board provides the auto-dial, auto answer, tele-
phone
line interface and a 300 baud Modem. The programmable
speaker volume control is also located on this board.
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