HP HP-97 User Manual

CORVALLIS DIVISION
(/A cackaro 97-101
SERVICE NOTE
Page 1 of 7
February 1, 1982 Supersedes:
SUBJECT: Card Reader Repair Procedures
Repair
of
the
HP-97
card
reader
consists
of
the
following
tests,
checks
and
adjustments:
1. Mount the card reader on ET-9613-91M.
2.
Power-up
the
wedge
box
and
using
an
oscilloscope,
adjust
the
card
reader in the following manner:
A.
The
fourth
switch
in
the
card
reader
is
normally
not
used.
It
pressures
the
card
against
the
magnetic
head.
The
problem
is
a
mechanical
one.
When
the
fourth
switch
is
deflected,
it
bends
the
entire
switch
contact
sheet
and
causes
the
head
switch
to
make
contact
prematurely.
Flat side faces printer on the HP-97.
—‘\L"] <«+— Switch Activator
A
tool
cut
from
a
plastic
sheet
has
been
developed
to
counter
this
problem.
Insert
the
tool
into
the
card
reader
exit
slot
before
adjusting
the
other
switches.
The
plastic
finger
on
the
end
of
the
tool
will
activate
the
fourth
switch
(make
sure
it
is
inserted
properly).
This
will
better
simulate
actual
operating
conditions.
i. Insert the tool.
ii.
Tighten
the
head
switch
screw
until
the
head
switch
makes
contact.
(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.

HP HP-97 Specifications

General

Brand	HP
Model	HP-97
Category	Calculator
Language	English