HP HP-97 User Manual

HP-97
Component-Level Maintenance
d. Visually inspect the unit for:
(1)
(2)
(3)
(4)
(5)
Worn or defective gears.
Broken/bent leads.
Stretched or missing springs.
Excessive lead-screw end-play.
Excessive play in the paper advance assembly.
e. Replace any worn or defective parts.
f. When reassembling the printer, be sure to lubricate the four points
indicated in figure 6-2.
g. Test the home position reed switch:
(1)
(2)
Manually rotate the lead-screw
until the head carriage is
positioned near, but not
touching, the right-hand wall
as shown in figure 4-15.
ROTATE |
GEAR |
HOME
POSITION
Connect an ohmmeter to the 0
reed switch leads. When the
head carriage is positioned | l
near the right-hand wall as
shown in figure 4-15, the
ohmmeter should measure less :
than 1 ohm. Figure U4-14., Head Carriage Home
Position
h.
Test
the
motor
for
open
or
shorted
windings
and/or
open
or
shorted
C2.
Connect
an
ohmmeter
to
the
dc
motor
leads.
If
the
meter
reads
less
then
9.0
ohms,
carefully
disconnect
one
lead
of
C2
and
measure
again.
Replace
the
defective
capacitor/dc
motor
assembly
if
necessary.
4-23

HP HP-97 Specifications

General

Brand	HP
Model	HP-97
Category	Calculator
Language	English