Page 238
fGL**;*--***:**3J
(,A'
Insert a small screwdriver into hole ES in the panel,
(/)
Replace the knob and tighten both setscrews.
and into the corresponding hole in the VFO enclosure.
so the screwdriver engages the notch in the shaft of
C1211. the 15-60 pF trimmer on the oscillator board.
If the blade on your screwdriver is too large for the
panel hole, you may be able to engage the trimmer
through the large knob hole.
(A
Depress the LSB button.
,
Adjust C1211 carefully until the LSB frequency
display
is
the same as the US8 frequency you wrote
down, and the same frequency
is
displayed when
either the LSB or USB
is
depressed. Remove any metal
screwdriver before taking the frequency reading.
POSSIBLE CAUSE CHART
1.
The same frequency is not displayed in both LSB and
USB.
A. FUNCTION switch wiring.
B. Connector S01201.
C. DiodeD1201.
(4
Check the stablllty of the VFO frequency d~splay. If
necessary, adjust the VFO level for a stable
d~splay at
BAND
sw~tch posltlons WWV and 29.5.
1
(j)
Check the stability of the frequency display at all
positions of the BAND switch. If the display
is
I
unstable on any band, perform the second step under
"VFO Output Adjustment" on Page 237. Do not turn
the control beyond the point where the display
becomes stable.
(/)
Release the ON button.
RECEIVER ALIGNMENT
Refer to Pictorial 12-37 (fold-out from Page 239) for the
following steps.
(J)
Turn the BAND switch to
3.5.
(, )
Loosen the setscrew in the band switch shaft collar.
I
-1
(,/I
To prevent light from shining through, place small
(,>
Refer to Detail 12-37A and pull the BAND switch
pieces of black tape over holes ES and ET (the two knob and shaft forward
until the end of the shaft
is
1
VFO adjustment holes) on the back of the panel.
over the converter assembly.
!
Detail
12-37A
1
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