Alignments

Ranger TR296 Alignment

And other radios that use the EPT0148-11Z PCB


Test equipment required


Power Supply: 13,8 VFrequency CounterDummy Load 50 ohmOscilloscope
DC AmperemeterRF SSGAF SSG


Preparation for alignment



ClarifierMid.
SQ GAINMax.
AF GAINMax.
RF GAINMax.
MIC GAINMax.
MOD, S/RFS/RF
NB/ANLOff
Channel19


Alignment Procedure


ItemSettingAdjustMeasurement
PLL ALIGNMENT
VCO VoltageSet radio to CH 1, AM RX mode.
Clarify setting in 12 oclock position.
Connect DC Voltmeter to TP9 (R207).
Connect Oscilloscope to TP10 (R101).
Connect Oscilloscope to TP1 (R106).
L19
L21
L20
2.5 VDC 0.1
CH 1 & CH 40 Max.
Output and Balance.
AM FrequencySet radio to CH 1, AM RX mode.
Connect frequency counter to TP1 (R106).
L2334.76500 MHz 20 Hz
LSB FrequencySet radio to CH 1, LSB RX mode.
Connect frequency counter to TP1 (R106).
L2234.76350 MHz 20 Hz
USB FrequencySet radio to CH 1, USB RX mode.
Connect frequency counter to TP1 (R106).
L5934.76650 MHz 20 Hz
TX FrequencySet radio to CH 1, AM TX mode.
Connect frequency counter to TP1 (R106).
VR534.76500 MHz 20 Hz
AM TX FrequencySet radio to CH 19, AM TX mode.
Set Mic Gain fully counter clockwise.
L3127.18500 MHz 20 Hz
LSB TX FrequencySet radio to CH19, LSB TX mode.
Set Mic Gain fully clockwise.
AF signal 25 mV, 1 KHz to microphone.
L3027.18400 MHz 20 Hz
USB TX FrequencySet radio to CH19, USB TX mode.
Set Mic Gain fully clockwise.
AF signal 25 mV, 1 KHz to microphone.
CT227.18600 MHz 20 Hz
TRANSMITTER ALIGNMENT
BIAS CurrentSet radio to CH 19, USB TX mode. MOD off.
Connect current meter to TP8 (+) and green lead wire (-).
Connect current meter to TP7 (+) and violet lead wire (-).

VR8

VR9

30mA

50mA
AM TX PowerSet radio to CH 19, AM TX mode.
Connect RF power meter to antenna jack.

L48, L47
L46, L45
L38, L36

L38

VR10
RF Power Output
MAX

Balance Power between CH 1 and CH 40.

4W.
SSB ALCSet radio to CH 19, USB TX mode.
Set Mic Gain fully clockwise.
AF signal 25 mV, 1 KHz to microphone.
VR1112W
SSB Carrier BalanceSet radio to CH 19, USB TX mode.
Connect Oscilloscope to L44 (TR39C).
Mic Gain off.
VR4Spurious Emission to minimum.
AM ModulationSet radio to CH 19, AM TX mode.
Set Mic Gain fully clockwise.
AF signal 30 mV, 1 KHz to microphone.
VR790%
RF Power MeterSet radio to CH 19, AM TX mode.
MOD off.
VR6Adjust RF Power meter needle until it is in-between the green and red bar on PWR scale.
RECEIVER ALIGNMENT
AM SensitivitySet radio to CH 20, AM RX MODE.
Clarify setting in 12 oclock.
Set RF gain fully clockwise.
Set SQ fully counter clockwise.
Set VOL control to 2 oclock.
Set NB/ANL to OFF position.
Connect RF SG to antenna jack.
Frequency 27.205 MHz, Level 1 uV.
MOD 30%, 1KHz.
Set radio to CH 40 AM mode.
RF SG setting 27.405 MHz.
Set radio to CH 1 AM mode.
RF SG setting 26.965 MHz.
L13, L15
L3, L4, L5
L6, L7, L8
L9, L10
Audio output > 2V
S/N > 10 dB
USB SensitivitySet radio to CH 20, USB RX mode.
MOD off.
Set VOL control fully clockwise.
RF SG setting 27.206 MHz, Level 1 uV.
L12, L14 Audio output > 4.5V
S/N > 20 dB
LSB SensitivitySet radio to CH 20, LSB RX mode.
MOD off.
VOL control fully clockwise.
RF SG setting 27.204 MHz, Level 1 uV.
L12, L14 Audio output > 4.5V
S/N > 20 dB
NB/ANL AdjustSet radio to CH 20, AM RX mode.
RF SG setting 27.205 MHz, Level 100 uV.
MOD 30%, 1KHz.
Set NB/ANL/OFF switch to NB/ANL.
Connect Voltmeter to D2 (Cathode).
L1, L2DC voltage to max.
( >1.5V )
AM SquelchSet radio to CH 20, AM RX mode.
Set SQ control at fully clockwise.
RF SG setting 27.205 MHz, Level 1 mV.
MOD 30%, 1KHz.
VR3
Slowly
Adjust very slowly until quelch just open
AM S/RF MeterSet radio to CH 20 AM RX mode.
MOD off.
Set S-RF/CAL/SWR switch to S/RF position.
RF SG setting 27.205 MHz, Level 100 uV.
VR1Meter needle to S9 on the S scale
SSB S/RF MeterSet radio to CH 20, USB RX mode.
MOD off.
Set S-RF/CAL/SWR switch to S/RF position.
RF SG setting 27.206 MHz, Level 100 uV
VR2Meter needle to S9 on the S scale


Microphone socket pin out


PinDescription
1Microphone Ground
2Microphone
3RX Key (Connect to Ground)
4Ground
5TX Key (Connect to Ground)


This counter shows the number of hits since the 15th September 2002


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