Heathkit SW-7800 - Page 25

Heathkit
Page
113
General
(Cont’d.)
‘CONDITION
POSSIBLE
CAUSE
No
BFO
signal
A.
Q406,
B
Laz6,
cc.
Dazg,
‘Signals
sound
identical
in
the
USB and
LSB
modes.
A.
Q405,
B.
bast
c.
swe,
RF
attenuator
does
not
function.
A.
D414,
B Re.
Weak
signal
reception
A
swt
No
signals
in
the
AM
mode,
SSB
is
okay,
A.
aoa,
B.
swa
No
signals
in
the
SSB
modes,
AM
is
okay
A
Udo6,
403.
B.
2406,
L426,
0428.
No
+
11
volts
on
the
receiver
circuit
board.
AL
RSI
13-and
+
11-volts
sources
are
low.
Hum
in
the
speaker.
A.
€509, 0511
B.
425
through
D428,
No
muting
when the
muting
line
is
rounded.
A.
0404, 0423,
Front-end
overloads.
No
meter
movement
407,
0421,
0422
40a,
D418,
Dato.
o@>