Field Service Procedure - Replacement Pol Pot Kit, 6006C, 6009C,
9597B & 9507
Page
2
of
7
Document No
135302 Rev B
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Tel, Inc.. This document may not be reproduced or distributed in any form without prior written
consent of Sea Tel, Inc.
5.
Verify
the
Resistance
of
the
Pol
Pot:
The
polang
potentiometer
(pol
pot)
consists
of
an
internal
slider
as
well
as
a
CW
and
CCW
contact.
To
verify
the
resistance
of
the
pot
a
multi
meter
can
be
used
to
measure
between
the
slider
and
one
of
the
wipers
whilst
rotating
the
shaft
through
its
range
and
verifying
the
0
–
5K
ohms
is
outputted
correctly.
Disconnect
J1
from
motor
termination
PCB
assembly.
Looking
down
onto
the
shaft
of
the
pot
rotate
it
clockwise
until
it
reaches
its
end
stop.
Now
measure
the
resistance
between
the
slider
and
the
CW
contact
(red
cable,
pin
3
on
the
IDC
connector
and
the
grey
cable
pin
2
on
the
IDC
connector).
The
feedback
should
be
approximately
0k
ohms.
Now
slowly
rotate
the
shaft
of
the
pot
counter
clockwise,
the
reading
should
count
up
sequentially.
After
five
turns
the
pot
will
be
in
the
centre
of
its
range
giving
a
resistance
of
approximately
25k
ohms.
Continue
to
rotate
the
pot
until
the
counter
clockwise
end
stop
(it
will
now
have
turned
through
all
10
rotations
of
its
range),
the
resistance
should
be
approximately
5k
ohms.
Leaving
the
pot
at
its
counter
clockwise
end
stop
measure
between
the
clockwise
contact
and
the
slider
(grey
cable,
pin
2
on
the
IDC
connector
and
the
brown
cable
pin
1
on
the
IDC
connector)
the
resistance
should
be
reversed
from
the
previous
rotation,
reading
0
ohms.
Rotating
the
shaft
of
the
pot
clockwise
should
increase
the
resistance
through
its
range
to
5k
ohms.
Any
error
with
the
pot
not
giving
the
correct
resistance
is
an
indication
the
pot
is
defective
and
needs
replacing.
Содержание 6006C
Страница 1: ......
