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Heathkit
Page 53
INITIAL TESTS AND ALIGNMENT
INITIAL TESTS
In the following steps, you will perform certain tests
to verify
that
your
Linear
Amplifier
is wired
properly. If you do not obtain the correct results in
any of the steps, check the items listed in some of the
steps or refer
to the
"Troubleshooting
Chart"
beginning on Page 66. Correct the problem before you
continue.
CAUTION:
Do not connect the line cord to an AC
outlet until astep directs you to do so.
PRIMARY WIRING
Refer to Pictorial 7-1 for the locations of the test
points called out in the following steps.
IMPORTANT: A wiring error in the primary wiring
circuit (line cord, power switch, etc.) of your kit could
cause you to receive a severe electrical shock. These
'Primary Wiring Tests" will help you eliminate any
such errors that may exist.
¢
Be sure the line cord plug is NOT connected to
N
an AC outlet.
NOTES:
1.
If you do not have an ohmmeter, carefully
check
the line cord, switches
SW3
and
SW4, relay K2, and the power transformer
wiring against that shown in Pictorials 6-
S
wx
2,
63,
and
6-17
(Ilustration
Booklet,
Pages 20, 22, and 50). Make sure there are
no fine strands of wire or solder globs
touching adjacent terminals or the chassis.
2.
If you have an ohmmeter, perform the fol-
lowing resistance measurements.
Set the ohmmeter to the R x 10 range.
Connect the negative ohmmeter lead to the
ground post on the rear of the chassis. Leave
this lead connected to the ground post until a
steps directs you to disconnect it.
Touch
the positive ohmmeter lead to either
flat prong of the line cord plug. The ohmmeter
should indicate infinity with the PWR/OFF
switch on or off. If you do not obtain the correct
indication, check the wiring of switches SW3
and SW4, relay K2, and barrier strip RD.
Touch the positive ohmmeter lead to the other
flat prong of the line cord plug. The ohmmeter
should
indicate
infinity with the PWR/OFF
switch on or off. If you do not obtain the correct
indication, check the wiring of switches SW3
and SW4, relay K2, and barrier strip RD.
Touch the positive ohmmeter lead to the round
prong of the line cord plug. The ohmmeter
should indicate zero ohms with the PWR/OFF
switch on or off. If you do not obtain the correct
indication, make sure the green line cord lead is
properly connected and soldered to solder lug
RA.
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