Common Section - Kenwood NXR-710 Service Manual

Common Section

Item Condition
1. Setting 1) Connect the unit to a suitable power supply (13.6V).
2) Turn the power switch on after connecting a PC and FPU cable to the radio.
3) Start up the program for the adjustment.
2. RX Assist FPU Test mode
voltage 1) Adjust Item: [Receive Assist]
Adjust 2) Adjust Item: [A: Low],
[A: Center], [A: High],
[B: Low], [B: Center],
[B: High]
3) Adjust Item: [A: Low],
[A: Center], [A: High],
[B: Low], [B: Center],
[B: High]
3. TX Assist FPU Test mode
voltage 1) Adjust Item: [Transmit Assist]
Adjust 2) Adjust Item: [A: Low],
[A: Center], [A: High],
[B: Low], [B: Center],
[B: High]
Press [Transmit] button.
3) Adjust Item: [A: Low],
[A: Center], [A: High],
[B: Low], [B: Center],
[B: High]
Press [Transmit] button.
4. Sensitivity 1 FPU Test mode
Adjust 1) Adjust Item: [Sensitivity 1]
BPF Adjust 2) Adjust Item: [Low], [Low'],
[Center], [High'], [High]
ADJUSTMENT
Measurement
Test-
Unit Terminal Unit
equipment
DVM TX-RX RX_CV
DVM TX-RX TX_CV
NXR-710
Adjustment
Parts Method
PC 3.0V ±0.1V
ADJ
[V] indicator on the PC win-
dow shows "VCO lock volt-
age".
Change the adjustment value
to get "VCO lock voltage"
within the limit of the speci-
fi ed voltage.
Press [Apply All] button to
store the adjustment value.
Confi rm the VCO lock voltage
approximately 3 seconds
after the adjustment value is
changed.
Check 3.0V±0.1V
PC 3.0V ±0.1V
ADJ
[V] indicator on the PC win-
dow shows "VCO lock volt-
age".
Change the adjustment value
to get "VCO lock voltage"
within the limit of the speci-
fi ed voltage.
Press [Apply All] button to
store the adjustment value.
Confi rm the VCO lock voltage
approximately 3 seconds
after the adjustment value is
changed.
Check 3.0V±0.1V
PC Write the value as Press [Apply All] button to
ADJ followings (typical store the adjustment value.
value)
[Low] = 55 Variable-Capacitor Tune volt-
[Low'] = 70 age is adjusted.
[Center] = 85 (Output voltage is adjustment
[High'] = 110 of BPF)
[High] = 135
Specifi cations / Remarks
41