Heathkit HW-9 - Page 75

Heathkil
TEST POINT
OHMMETER READING
POSSIBLE
CAUSE
(
)
Set your ohmmeter
toR
x
1000.
(
)
R12 pin.
15 kO to30kft
A.
Q103
circuit.
(
)
Set your ohmmeter
toR
X
100.
( )
Tl2pin.
800 to 1800
A. T12 foil
shorted.
(
)
Reconnect plug P101,
B. BFO
circuit, D141,
Q114.Q115.
(
)
CWL.
3000 to 6000 A. D143 reversed
or faulty.
(
)
12 V pin.
{ )
Rl2pin.
(
)
T12 pin.
( )
9Vpin
(
)
CWL.
(
)
TP104.
300 to 600
300 to 700
300
to
700
300 to 800
300 to 700
* *
infinite
A. Short
on 12 V line,
T/R board.
A. Short on R12 line.
B. P101 wired wrong.
A. T12 line.
B.
CW LEVEL control
wiring.
A. T/R board.
B. U301,T302.
A. CW
LEVEL control
wiring.
B. T12 line from C/R
board.
A. Shorted cable at OSC
or BFO/IN.
(
)
Turn the
Transceiver
over as shown in Picto-
rial
4-2
(Illustration Booklet,
Page
33)
and set
your ohmmeter to the R
x
1000 range. Then
make
the following
tests.
**
This
indication should
decrease
as
you
turn
the CW
LEVEL
control clockwise.