HP HP-97 - Page 154

CORVALLIS DIVISION
SERVICE
NOTE
97-103
Page 1 of 3
A caciaro
February 2, 1982 Supersedes:
SUBJECT: HP-97 Failure Symptoms
Our
repairpersons
in
Corvallis
have
compiled
a
list
of
Common
Failures
and
the
corresponding
part
that
caused
the
problem.
This
list
is
valuable
as
reference
on
difficult
repairs.
Symptoms Problem Part
1.
Dim
display
Q3
(keyboard
PCA)
2. Keys don't enter PICK
3.
Paper
advance
doesn't
work
PAS
wired
incorrectly
4.
Display
blanks
when
printer
used
Printer
motor
5. Freezes at end of program ROM 6
6. NTO ROM @
7. CLX acts like PRINT X ACT
8. NTO Zener diode
9. Keys do not have any relationship to
keycodes or keys pushed ROM 5
10. Doesn't print PICK
11. Extra segments in display ACT
12. Will not merge data completely ROM 6
13. Keyboard entries "screwed up" ROM 6
14. Occasionally displays 2 zeros (one in center,
one at right) Q2 (display)
15. Flickering "F" & "G" segments in left most
digit when 1444... entered (occurs only when
on charger with battery at full charge) Cl1 (on cathode)
16. Trig functions blank display ROM 2
17. Errors after 4th pass of blank card ROM 6
18. Keys won't enter. Prints erratic PICK
19. Extra decimal on turn-on. Changing to ghost
number when machine used Short on cathode
20. After warm-up, center segment doesn't
illuminate ACT
21. "NORM" print mode same as "MAN" mode Solder splash on CRC
22. Intermittent NTO Battery contact (+) loose
23. Paper advance too short Reed switch
24. Diagnostic show 9.999999999 ACT
25. Print advance inoperative ACT
26. Printed 0.00%** or CLX when bumped or moved Short on PICK
27. ON/OFF switch will not turn off Short on ON/OFF Switch
28. Won't read cards ROM 6
29. Nothing enters from keyboard. Printer & card
reader inoperative ROM 6
(continued...)
For more information, contact the Service Engineering Manager, Corvallis Division—1000 N.E. Circle Bivd., Corvallis, Oregon 97330
Telephone (503) 757-2000 ¢ TWX # 510-596-0683
Printed in U.S.A.