Uniden 2020 Manual Download Page 22 | Manualshive

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Uniden 2020 Manual Download Page 22

UNIDEN 2020

Sid 21 (26)

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Summary of Contents for 2020

Page 1: ...r 2 2 Adjustment Procedures 1 Connect FrequencyCounter to the Pin 1 Marker output of J751 on the operation unit 2 Activate MARKER OSCILLATOR by pulling out RF ATT knob 3 Tune trimmer capacitor C753 so...

Page 2: ...ITCH to USB 3 Set BAND SWITCH to 14 0 SEGMENT SWITCH at 200 300 and tune the main dial to recive 14 200 MHz signal 4 Turn RF GAIN CONTROL fully clockwise 5 Turn RF ATT CONTROLL fully clockwise 6 Tune...

Page 3: ...at 14 2 MHz to obtain maximum outout 4 Set MODE SWITCH to USB 5 Turn MIC GAIN CONTROL fully clockwise 6 Set Meter Switch to ALC position 7 Set AG 1 frequency to 1 900 Hz and AG 2 s to 2300 Hz 8 Measu...

Page 4: ...d jack as indicated below 1 RF POWER AMP SWITCH Off 2 Connect external speaker 4 ohms or 4 ohm dummy load to the EXT SP jack 1 3 Set PWR SWITCH to ON after completion of all preparations as mentioned...

Page 5: ...on each band 5 Control SSG output during this process to make adjustment easier Chart 2 2 1 A B C BAND SEGMENT FREQ MHz COIL No 15 0 0 500 15 000 L201 L208 3 5 100 600 3 600 L202 L209 7 0 100 600 7 1...

Page 6: ...then CONNECT the IF UNIT to the EXTENSION BOARD 3 3 Coil Adjustment 1 Process the same as 2 4 1 4 2 Adjust L351 L354 to get the maximum readings or S Meter or mV 3 4 Carrier Balance Adjustment 1 Proce...

Page 7: ...ollowing instructions at the position of the wordings OBTAIN MAXIMUM OUTPUT AT MHz which will be mentioned here after during tuning procedures and marked 1 Make 1 1 1 3 preparations 2 Set MODE SWITCH...

Page 8: ...EN TRIANGLE MARK on the meter 3 GENERATOR UNIT ALIGNMENT 3 1 Test Equipment Required 1 RF voltage Meter 2 AF milli volt Meter mV 3 Audio Generator AG 4 Frequency Counter 5 Oscilloscope 3 2 Preparation...

Page 9: ...place after completion of OUTPUT METER adjustment 5 1 5 2 2 Obtain maximum output at 14 2 MHz 3 Set MODE SWITCH to USB 4 Connect RF meter to antenna jack 5 Make sure that MIC GAIN CONTROL is set full...

Page 10: ...H to ALC 3 Turn CARRIER CONTROL knob fully clockwise 4 Set STANDBY SWITCH to MANU 5 Adjust each coil in chart 4 2 1 B to get the maximum meter reading 6 Return CARRIER CONTROL counterclockwise so as t...

Page 11: ...R08 on the rear panel so that the IK reading shows 200 mA 6 FEEDBACK NEUTRALIZING 6 1 Test Equipment Required 1 RF voltage Meter RF VTVM 6 2 Adjustment Procedures 1 Obtain maximum output at 21 2 MHz...

Page 12: ...8 2V 0 2V of meter readings 2 6V DC Power Source Connect the meter to Pin 5 of J651 and check that the meter reading indicates within 5 5 6 5V This process should be made after completion of 1 as men...

Page 13: ...n dail nd set it to 00 KHz toward 90 kHz 100 kHz then adjust L702 to get 9 038 kHz counter reading 5 Then turn the dial to 00 kHz toward 10 kHz and adjust trimmer C707 to get 9 138 kHz counter reading...

Page 14: ...L801 so as to get 16 000 MHz counter readings CAUTION Don t use magnetized tools when adjusting PLL unit because magnetization of VCO coil core may make C N of oscillation output worse extremely 2 3...

Page 15: ...C117 7 0 L103 29 025 C118 14 0 L104 36 025 C119 21 0 L105 43 025 C120 28 0 L106 50 025 C121 28 5 L107 50 525 C122 29 0 L108 51 025 C123 29 5 L109 51 525 C124 27 0 L110 49 025 C125 3 3 Xtal Oscillator...

Page 16: ...3 5 1 C so as to get the assigned wave from on oscilloscope 3 5 1 B respectively 3 After completion of these adjustments remove sweep generator and oscilloscope Then connect RF voltage meter to Pin 1...

Page 17: ...118 119 120 Q 201 202 203 204 Q 251 Q 351 352 353 354 355 356 357 357 2SC735Y 2SC784R 2SC372Y 2SC372Y 2SC784R 2SC784R 2SC784R 2SC784R 2SC784R 2SC784R 2SC784R 2SC380Y 3SK35BL 2SK19GR 2SC380Y 2SC380Y 2S...

Page 18: ...3 9 8 3 5 7 9 0 1 5 12 0 5 9 3 3 2 5 7 4 6 7 6 6 7 5 8 7 8 7 6 4 12 0 11 1 11 1 9 5 8 2 4 2 4 5 4 8 4 3 1 0 0 4 7 5 0 0 7 0 0 2 0 0 2 3 1 8 1 2 3 2 3 3 2 7 2 1 6 4 5 8 3 2 11 8 9 5 8 9 3 2 6 7 0 0 1 4...

Page 19: ...08 809 2SC1682 2SC373 2SC373 2SK19 2SK19 3SK35 2SK19 1 2 V 0 7 0 0 5 0 8 0 9 0 8 1 7 V 1 2 0 7 5 0 V 3 3 3 3 3 2 4 2 8 8 8 7 Measurement by DIGITAL VOLTMETER RF VOLTAGE B or G1 G2 C or D Q 806 807 808...

Page 20: ...UNIDEN 2020 Sid 20 26 0 1 uS DIV 0 1 uS DIV 5 uS DIV 5 uS DIV 0 5 uS DIV 0 5 uS DIV 1 A 1 B 1 A 1 C 1 D 1 D 1 C...

Page 21: ...UNIDEN 2020 Sid 24 26 PLL Unit PC 086 Operation Unit PC 085...

Page 22: ...UNIDEN 2020 Sid 21 26 1 E 1 F 1 G 1 H 1 H...

Page 23: ...UNIDEN 2020 Sid 22 26 5 uS DIV 0 1 uS DIV 0 1 mS DIV 5 uS DIV 0 1 mS DIV 1 I 1 I 1 J 1 J 1 K...

Page 24: ...UNIDEN 2020 Sid 23 26 2 C 2 B 2 D 2 A 2 D 20 Us DIV 0 1 Us DIV 1 Us DIV 0 1 Us DIV 20 Us DIV 20 Us DIV...

Page 25: ...UNIDEN 2020 Sid 25 26...

Page 26: ...UNIDEN 2020 Sid 26 26...

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