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HP HP-97 User Manual
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Assembly-Level
Maintenance
HP-97
Table
3-7.
Diagnostic
Test,
Part
Two
STEP
PROCEDURE
DISPLAY
PRINTOUT
1
Set
switches:
OFF
EHII
ON
TRACE
MAN
(WM
NORM
PRGM
IHIIM
RUN
2
Read
side
1
of
diagnostic
test
part
two
card.
CRD
3
Read
side
2
of
diagnostic
test
part
two
card.
0.00
Yy
Press
A¥
(flashing)
.:
=z
n.';:n
G
=
-8
£
.-".
¥
The
first
line
is
printed
after
the
program
is
run
continuously
for
one
hour.
Each
subsequent
line
is
printed
at
hourly
intervals.
Numbers
therefore
indicate
the
number
of
hours
the
test
has
run.
Note:
Refer
to
paragraph
3-26
for
temperature
requirements.
3-28.
HP-97
ASSEMBLY
REMOVAL
AND
REPLACEMENT
PROCEDURES
3-29.
The
following
procedures
describe
in
detail
removal
and
replacement
of
the
HP-97
assemblies.
Follow
all
directions
as
given,
step
by
step,
to
detach
and
replace
any
HP-97
assembly.
In
most
cases
it
will
be
necessary
to
perform
first
the
previous
steps
as
indicated.
3-30.
For
a
list
of
replaceable
assemblies,
refer
to
section
VI.
To
reassemble
the
HP-97,
follow
the
removal-replacement
procedures
in
reverse
order.
The
removal-replacement
procedures
are
given
in
the
following
order:
a.
Battery
pack
removal.
3-14
39
41
Table of Contents
Cover
1
Contents
4
I. General Information
9
Introduction
9
Description
9
Compatibility
9
Identification
10
Standard Accessories
11
Optional Accessories
11
II. Theory of Operation
15
HP-97 Logic
15
Display
16
Performing a Function
18
Timing
18
Program and Data ROM
19
Printer
20
Print Head Drivers
21
Printer Motor Control
21
Print Intensity Control
22
Card Reader
22
Power Supply
23
Battery Charging
24
Power-On Reset
24
III. Assembly-Level Maintenance
27
Introduction
27
Recommended Tools and Fixtures
28
Individual Key Sequence Tests
28
Full Operational Test
32
Initial Test
33
Program Memory Test
33
Functional Test
34
Keyboard Test
36
Diagnostic Test
38
HP-97 Assembly Removal and Replacement Procedures
40
IV. Component-Level Maintenance
59
Introduction
59
Recommended Tools and Fixtures
59
Logic PCA Troubleshooting
60
Power Supply Troubleshooting
60
Faulty Function Verification and Repair
60
Logic PCA Operational Test
66
Initial Test
66
Program Memory Test
66
Functional Test
70
Printer Assembly Maintenance
83
Printer Mechanical Maintenance
83
Printer Electrical Maintenance
86
Keyboard Troubleshooting
90
Display Troubleshooting
90
Cathode Driver IC Replacement
91
Card Reader Troubleshooting
96
V. Accessories
117
Introduction
117
HP 82033A Battery Pack
117
AC Adapter/Recharger
117
HP 82044A Security Cable and Lock
118
HP 82037A Reserve Power Pack
118
VI. Replaceable Parts
121
Introduction
121
Ordering Information
121
Appendix A: Improper Operations
129
Appendix B: Symbols and Abbreviations
131
Appendix C: Service Cards
135
Introduction
135
Program Memory Test Program Card
136
Functional Test Program Card
136
Data Card 1
138
Data Card 2
138
Diagnostic Test Program Cards
139
Appendix D: Service Notes
143
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HP HP-97 Specifications
General
Brand
HP
Model
HP-97
Category
Calculator
Language
English
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