Kenwood TS-830S Service Manual page 56

VFO-230 PARTS LAYOUTIAC VOLTAGE CONVERSION
r DIGITAL UNIT (X54-1 570-00)
r ENCODER UNIT (X54-1580-00)
Item
7 Beat
adjustment
t
DISPLAY TUBE
I
VFO-230 (K) AC Voltage conversion
i
E
A n abnormal beat
,
Check
VFO-230 from 0 0 to
should not be
around 5 0 0 while Isten-
heard
Condition
TS 8 3 0 AGC FAST
RIT
0
FF
RF ATT OFF
VBT NORM
IF SHIFT Centered
To operate the VFO-230 ( K ) on 2 4 0 V AC, the power
transformer primary tap must be rewired from 120V to either
the 220V or 2 4 0 V tap.
1 Unplug the AC power cable and VFO lnterconnectlng
cable.
2 Remove the top cover
3 Move the AC l ~ n e from the 120V (Red) to e ~ t h e r the
Measurement
2 2 0 V (Green) or 240V (Blue) transformer winding.
4 Change the AC fuse from 0.5A to 0 . 3 A . Tag the power
cord at the back of the unit to indicate that the
transformer is wired for 2 4 0 V AC, and the power fuse
should be 0 . 3 A and not 0.5A.
5 Replace the top cover and cable up to verify your work.
Test
equipment
MODE
VFO-230
1
FUNCTION (REC) VFO
DISPLAY (Dlal) 2 0 0
Connect the SSG output
t o the ANT term~nal on
the TS-830s
Adjust the SSG attenuator
until the S meter on
the TS-830s indicates
A L
Fuse
Ter
m ~ n a l
D I ~ I -
tal
Adjustment
2 0 dB
Set the VFO-230's dial
to 2 0 8 (zero beat)
Speclflcat~on
'"It
Obtain a beat from the
TS-830
Remarks
Method
Adjust the SSG
output frequency
until a maximum
S-meter readlng
IS
obta~ned on
VR2
Turn the d ~ a l on the
the TS-830s
Adjust t o the
minlmum beat
level