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| RT-200S
——sSWRXT—200S
|
a2
WN
—
- Connect the oscilloscope vertical input directly to the test point TUN
OUT
H and connect the shielded lead to the
test point
E or chassis ground.
5. Connect the SWEEP
VOLTAGE
OUTPUT of the sweep generator to the oscilloscope.
6. Proceed as outlined in the FM-IF ALIGNMENT
CHART.
FM-IF ALIGNMENT
CHART
Connect sweep
Sweep
generator output to
generator of
a three-turn loop
10.7 MHz
antenna of 10cm
center freq.
diameter.
with 10.7
MHz marker.
Tuning Knob | Set scope for con-
LOO3,
| Turn the coil L109 fully
fully counter- | necting output
L109
counterclockwise to obtain
clockwise
signal from TUN
a single peak. i
10
(Lowest
OUT to vertical
Adjust coil LOO3 in order
Frequency.)
| axis of scope ''V''
until the best single peak
and sweep gener-
is obtained.
ator output to
Finally turn the coil L109
horizontal axis
to obtain S curve.
ae ae
Fig. 11
1F Sweep Test:
FM Sweep
Receiver
Generator
under test
3-turn Loop Antenna located near the L001 or LOO2.
FM-RF ALIGNMENT
. Set the volume control to mid-position.
mn
fF
WN
—
signal output level to provide a measurable indication.
6. Proceed as outlined in the FM-RF ALIGNMENT
CHART.
FM-RF
ALIGNMENT
CHART
OSC. Coil
1
87.5 MHz
Tuning Knob fully
Counterclockwise
L002
(Lowest Frequency)
108 MHz
Tuning Knob fully
Clockwise
@
Remarks
Adjust for maximum
output indication
Adjust for maximum
OSC. Trim.
Output indication
Adjust for maximum
Output indication
Repeat steps 4 and 5 as required.
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To signal generator
|
50 ohm
|
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| 30~33
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(SW)
ver
|
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;
(SG imp. 50 ohm)
|
EOGhm
|
generator
| To receiver
|
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(SG imp. 50 ohm)!
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RUN
FREQUENCY
ALIGNMENT
Adjust
R203
under
no signal condition
so as to obtain
38 kHz
A 6.3 kHz standard tape must be used for this adjustment. Connect
a VTVM
or an oscilloscope to the EXT Speaker jack and adjust the
forward azimuth and the reverse one by using a phillips screwdriver
to maintain the maximum
output voltage.
TAKE-UP/SUPPLY
REEL
TENSION
1. Insert cassette torque meter (HARTAK
X-87 Torquette).
Figure 14.
2. Press PLAY button and read torque meter. Torque should be 30 to 60 gcm.
3. Release PLAY
button and press REWIND
button. Torque should be 75 to 150 gcm. If necessary, clean take-up
reel or drive belt with alcohol, or replace belt.
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