President Lincoln and HR2600


ALIGNMENT PROCEDURE


PLL and CARRIER OSCILLATOR PORTION


Test equipment required:
Power Supply: 13,8 VOscilloscopeFrequency CounterDC Voltmeter

Preparation alignment:
PA SWOff
RITMiddle position
ModeAM
Frequency28.000 MHz

StepConditionAdjustmentProcedure
1AM
RX
L315Connect the Oscilloscope and Frequency Counter to TP306. Adjust for 6.200 MHz +/- 20 Hz
2AM
RX
L318Connect the Oscilloscope and Frequency Counter to TP304. Adjust for 38.6950 MHz +/- 20 Hz.
Check:
USB : 38.6975MHz
LSB : 38.6925MHz
3AM
RX
L317Connect the DC Voltmeter to TP 303. Adjust for 6.5 V +/- 0.1 V
4CW
RX
L117Connect the Oscilloscope and Frequency Counter to TP1. Adjust for 10.695 MHz +/- 20 Hz
5LSB
RX
L118Connect the Oscilloscope and Frequency Counter to TP1. Adjust for 10.6925 MHz -40 Hz to + 0 Hz
6USB
RX
L116Connect the Oscilloscope and Frequency Counter to TP1. Adjust for 10.6975 +/- 20 Hz
7USB
RX
VR111Connect the Oscilloscope and Frequency Counter to TP5. Adjust for 38.6975 +/- 20 Hz

AdjustmentDescription
VR304Amplifier Gain Adjustment
Only in President HR2600

Adjustment of Balanced Mixer`s

AdjustmentDescription
VR301DC Balance Adjustment for Balanced Mixer
L3039-10MHz Signal Balance Adjustment to Mixer
L30414-18MHz Signal Balance Adjustment to Mixer
Connect Oscilloscope to IC304 pin 2.
Adjust VR301 for correct DC-balance.
Adjust L303 for maximum signal.
Adjust L304 for maximum signal.

AdjustmentDescription
VR302DC Balance Adjustment for Balanced Mixer
L31322MHz Signal Balance Adjustment to Mixer
L31436-40MHz Signal Balance Adjustment to Mixer
Connect Oscilloscope to IC305 pin 2.
Adjust VR302 for correct DC-balance.
Adjust L313 for maximum signal.
Adjust L314 for maximum signal.

BandPassFilter Adjustment

AdjustmentDescription
L310High Band Adjustment
L319Low Band Adjustment
Connect Oscilloscope to Output Terminal for VCO.
Adjust L310 for maximum at 29.000MHz.
Adjust L319 for maximum at 28.500MHz.

BandFrequency Range (Without ChipSwitch or Frequency Modification)
A28.000 to 28.4999 MHz
B28.500 to 28.999 MHz
C29.000 to 29.4999 MHz
D29.5000 to 29.699 MHz

Output Frequency from PLL-PCB to Analog-PCB

Fvco = F + 10.6950MHz + a
F = Transmitting and Receiving frequency
Fvco = VCO Output frequency
a = 0kHz for CW/FM/AM
a = +2.5kHz for USB
a = -2.5kHz for LSB


TRANSMITTER PORTION


Test equipment required:
Power Supply: 13,8 VAF SSGRF VTVMDC AM-meter
AF VTVMFM Linear DetectorOscilloscopeRF Power Meter
Dummy Load, 50 ohm

Preparation alignment:
VR112Clockwise
VR113Counter Clockwise
VR103Clockwise
SWR/CALClockwise
RF GainMiddle position
PA SWOff
INDIC SWRF
Mic Gain SwOff
RF PowerMax.
Frequency28.000 MHz

StepConditionAdjustmentProcedure
1USB
No Mod.
VR13Remove the B002 (PB-100) from Main PCB. Connect a DC AM Meter to TP4 (+) and TP3 (-). Adjust VR13 for 50 mA reading on the DC AM Meter.
2USB
No Mod.
VR14Remove the B002 (PB-100) from Main PCB. Connect the DC AM Meter to TP4 (+) and TP2 (-). Adjust VR14 for 50 mA reading on the DC AM Meter
3USB
1 mV Mod.
L25Connect a RF Power Meter to Ant.jack. Connect a RF VTVM, an Oscilloscope and an RF Linear Dectector across an Dummy Load to the RF Power meter. Adjust L25 for maximum reading en the RF VTVM. During this step, set the AF Oscillator so that the output is less than 20 V. Repeat this step two times.
4USB
30 mV Mod.
VR5Adjust VR5 for 32.5 V reading on the RF VTVM.
5USB
30 mV Mod.
VR7Adjust VR7 so that the carrier leakage at USB and LSB become minimum and almost equal.
6CW
No Mod.
VR4Connect a SW between Pin 8 and 9 of ACC connector. When turn on the SW, adjust VR4 for 21 Watt reading on the RF Power Meter.
7AM
No Mod.
VR8Adjust VR8 for 10 Watt reading on the RF Power Meter
8AM
No Mod.
VR12Adjust VR12 so that "9" LCD just light on.
9AM
1 kHz 30 mV Mod.
VR6Adjust VR6 to obtain the 85% negative reading on the Oscilloscope.
10AM
1 kHz 1 mV Mod.
VR9INDIC: MOD. Adjust VR9 so that "9" LCD just light on.
11FM
1 kHz 30 mV Mod.
VR3Adjust VR3 for +/- 3 kHz deviation on the FM Linear Detector.
12CW
No Mod.
Vol.: Max.
VR10Connect an AF VTVM across a Dummy Load (8 ohm) between Pin 1 and Pin 2 of ACC connector. When turn on the SW, adjust VR10 for 0.4 V reading on the AF VTVM.


RECEIVER PORTION


Test equipment required:
Power Supply: 13,8 VDummy Load 8 ohmAF VTVMOscilloscope
HF SSG:28.000 MHz1 kHz30% Mod.

Preparation alignment:
NB SWOff
PA SWOff
Beep SWOff
VOLUMEMax.
RITMiddle position
ModeAM
SquelchMin.
DX/LOCDX
Frequency28.000 MHz

StepConditionAdjustmentProcedure
1AM
SSG 40dB
1 kHz Mod.
L1 L2 L3 L4 L5 L6Alignment of sensitivity. Adjust coils for maximum reading on the AF VTVM.
2AM
SSG 66dB
1 kHz Mod.
VR2Alignment of Squelch. Set Squelsch to maximum. Adjust VR2 so that the squelch just breaks.
3AM
SSG 46dB
No Mod.
VR1Alignment of S-meter. Adjust VR1 so that "9" LCD just lights on.
4FM
SSG 1 mV
1.5 kHz Dev.
L401Adjust L401 for maximum reading on the AF VTVM.
5AM
SSG 1 mV
Noise Gen.
L203Adjust L203 for maximum reading on the AF VTVM. Noise Generator output: 50 Hz SQ wave 2 V P-P.


This counter shows the number of hits since the 7th November 1999


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