~~='--*=.:**Ql
Page 235
(
,A
Depress the HI button.
POSSIBLE CAUSE CHART
1.
The last digit does not disappear.
A. Switch defective.
B. Switch wired incorrectly.
(/j
Depress the TUNE button. The relay should click as
it
closes. If
it
does not click, check the installation of the
POSSIBLE CAUSE CHART
1.
VOX does not operate.
A. Chassis wiring.
8. Q203,Q204.
C. IC201.
(,A
Depress the PTT (push-to-talk) switch on your
diodes at BE.
P
1
lo
:
L
microphone (if your microphone does not have a PTT
(
/f
Release the TUNE button.
switch, short terminal 2 of the MIC connector to the
chassis). You should hear a click
as
the relay closes,
I/)
Close the relay with the PTT wkch. Terminal H1
should measure
.7
volts.
and another click when vou release the switch and the
(.
)
Connect your microphone to the MIC socket (see
Figure
2-5 on Page 250 for microphone cable plug
connections).
replay opens.
(/
Release the PTT switch. The voltage should be
0.
0.
0203,D204,D205.
E. Microphone not properly wired for VOX
operation.
POSSIBLE CAUSE CHART
1.
T/R relay does not pull in.
A. Relay.
5.
Chassis wiring of the relay circuit.
C.
0205,Q206.Q207, or Q208.
-
POSSIBLE CAUSE CHART
1.
Voltage
at
HI
is
not
.7
volts.
A.
Dl defective.
B.
TIR relay w~red incorrectly.
.
(/I
Release the ON button, and all other buttons.
-
(
,
)
Release the HI button.
,
I
The microphone can be removed, if desired.
(/)
Deprea the PTT switch. The relay should not operate
(the PTT switch should operate the relay only when
COUNTER
the HI button is depressed).
POSSIBLE CAUSE CHART
T/R relay operates in LO POWER position.
Check
wtrlng of LOIHI POWER sw~tch.
(/I
Depress the VOX and the
HI
buttons.
(,/
Speak into the microphone and rotate the VOX GAIN
control slowly clockwise until the relay operates.
[/1
Speak into the microphone end rotate the VOX
DELAY control slowly clockwise until the relay holds
in for the desired length of time after you cease
talking and then drops out (opens).
(A
Release the VOX button.
(A
On card A, use your ohmmeter to check the resistance
from the center conductor of JlOl to the ground foil.
If
the meter shows less than infinite
(4
resistance,
you must find the cause and correct
it
before you
proceed.
(
/Y
Plug in circu~t board A
#85-14ELL
-.
--
-
(/
)
Insert the phono plug (on the shielded lead coming
-
from chaais cutout AA) through the rounded slot in
the lateral shield
Into phono socket JlOl on the
circuit board.
NOTE: In the following steps, the BAND switch is still at
3.5.
(/i
Depress the ON button. The display should read
6600.0.
.
-
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