Alignment
3-2
RX2 Unit
Local Section 2nd OSC
Refer to the drawing at the page bottom for the RX2 Unit com-
ponent locations and alignment points.
r Connect the RF millivoltmeter to TP8004, then adjust T8016,
T8017, and T8018 in succession several times for peak RF
millivoltmeter indication.
2nd Local Frequency
r Connect the frequency counter to TP8004, then adjust T8018
for 46.755 MHz (± 600 Hz) on the frequency counter.
2nd Local Amplifier
r Connect the RF millivoltmeter to TP8004, then adjust T8016
and T8017 in succession several times for peak RF
millivoltmeter indication (at least 500 mVrms).
PLL BPF
r Connect the RF millivoltmeter to TP8003, then adjust T8012,
T8013, and T8014 in succession several times for peak RF
millivoltmeter indication (at least 60 mVrms).
PLL Loop VCO
r Connect the DC voltmeter to TP8005. Tune the transceiver
display to the frequencies shown in the chart below, and adjust
the components listed for the corresponding voltage, or else
confirm required voltages.
RX Section Interstage Transformers
r Connect the RF signal generator to the antenna jack.
r Inject an RF signal (no modulation), and adjust T8002, T8004
~ T8007, T8009 ~ T8011, T8015, T8019, and T8020 in
succession several times for peak S-meter indication (adjust
the injection level as necessary to keep the meter around the
low side of the S-meter scale).
Tune to:
7.499 MHz
0.100 MHz
14.499 MHz
7.500 MHz
21.999 MHz
14.500 MHz
30.000 MHz
22.000 MHz
for
7.0 ± 0.1 V
1.3 ~ 2.5 V
7.5 ± 0.1 V
1.3 ~ 2.5 V
7.5 ± 0.1 V
1.3 ~ 2.5 V
7.0 ± 0.1 V
1.3 ~ 2.5 V
Adjust/Confirm
Adjust L8007
Confirm
Adjust L8010
Confirm
Adjust L8020
Confirm
Adjust L8024
Confirm
PLL Loop VCO Alignment
RX2 Unit Test & Alignment Points
VR8001
FM Squelch Threshold
T8020
RX2 RX IF Transformer
VR8007
S-Meter Full Scale
VR8006
IF Gain
T8019
RX2 RX IF Transformer
T8015
RX2 RX IF Transformer
T8007
RX2 RX IF Transformer
T8001
Noise Blanker
Connect DC Voltmeter
(minimum)
T8001
Noise Blanker
TP8004
2nd Oscillator: Connect RF Millivoltmeter (peak)
2nd Local Frequency: Connect Frequency Counter (46.775 MHz ± 600 Hz)
2nd Local Amplifier: Connect RF Millivoltmeter (>500 mVrms)
T8006
RX2 RX IF Transformer
L8007
PLL Loop VCO
L8010
PLL Loop VCO
L8020
PLL Loop VCO
L8024
PLL Loop VCO
TP8003
PLL BPF
Connect RF Millivoltmeter
(>60 mVrms)
T8012
PLL BPF
T8009
RX2 RX IF Transformer
T8010
RX2 RX IF Transformer
T8011
RX2 RX IF Transformer
T8002
RX2 RX IF Transformer
T8003
RX2 RX IF Transformer
T8017
2nd Oscillator
2nd Local Amplifier
T8004
RX2 RX IF Transformer
T8005
RX2 RX IF Transformer
T8016
2nd Oscillator
2nd Local Amplifier
T8018
2nd Oscillator
2nd Local Amplifier
T8014
PLL BPF
T8013
PLL BPF
TP8005
PLL Loop VCO
Connect DC Voltmeter (7.0 V ± 0.1 V)
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