Heathkit HM-2102 - Page 22

Page 18
HEBATHEIT®
IN CASE OF DIFFICULTY
Recheck the wiring. Trace each lead in colored pencil
on the Pictorial as it is checked. It is frequently
helpful to have a friend check your work. Someone
who is not familiar with the unit may notice
something consistently overlooked by the constructor.
It
is
interesting
to
note
that
about
90%
of
the
kits
that
are
returned
for
repair,
do
not
function
properly
due
to
poor
connections
and
soldering.
Therefore,
many
troubles
can
be
eliminated
by
reheating
all
connections
to
make
sure
that
they
are
soldered
as
described
in
the
‘Soldering’
section
of
the
‘Kit
Builders
Guide.”
Check the values of parts. Be sure that the proper part
has been wired into the circuit, as shown in the
Pictorial
diagrams
and
as
called
out
in
the
wiring
instructions.
4.
Check
for
bits
of
solder,
wire
ends,
or
other
foreign
matter
which
may
be
lodged
in
the
wiring.
5.
A
review
of
the
Circuit
Description
and
the
Schematic
Diagram
may
prove
helpful
in
locating
a
trouble.
NOTE: In an extreme case where you are unable to resolve a
difficulty, refer to the ‘Customer Service” information
inside the rear cover of the Manual. Your Warranty is
located inside the front cover .
Troubleshooting
Chart
Meter reads down-scale
on SWR or wattmeter.
Lower meter reading for
SWR Set (switch out) than for
SWR.
Calibrator portion of meter
not functioning correctly.
SWR null not correct.
PROBLEM
POSSIBLE
CAUSE
1
2
3. Capacitor C1, C2, or C9.
4
SWR reading while
transmitter is off.
2. Pickup coil L1 leads reversed.
3. C3 improperly connected.
No meter reading. Shorting wire not
removed.
Meter leads reversed.
Diode D1 or D2 reversed.
=
Input and output plugs reversed.
2. Pickup coil L1 leads reversed.
3. Switch S3 incorrectly
wired.
Input and output plugs reversed.
Diode D1 reversed.
Resistor R1.
Nearby transmitter in
Operation.
Improper load on wattmeter.