Uniden 2020 Manual Download Page 18

UNIDEN 2020 

Sid 18 (26) 

Section 

Q Nr. 

TYPE 

T or R 

E or S 

C or D 

B or G1 

G2 

 
AF 
 
 
 
 
 
 
 
 
GE 
 
 
 
 
AVR 
 
 
 
 
 
 
 
VFO 
 
 
OPR 
RF-PA 

 

Q 401 

402 
403 
404 
405 
406 
407 
408 
409 

Q 502 

503 
506 
507 
508 

Q 651 

652 
653 
654 
655 
656 
657 
658 

Q 701 

702 
703 

Q 754 

Q1001 
Q1001 

 

2SK30AY 
2SC372Y 
2SC372Y 
2SC372Y 

2SA495Y 

2SC372Y 
2SC735Y 
2SC372Y 
2SC372Y 
2SC380Y 
2SC372Y 
2SC372Y 
2SC380Y 
2SC380Y 
2SC372Y 

2SC11730 

2SC372Y 

2SC11730 

2SC372Y 

2SC11730 

2SC373Y 
2SC372Y 

2SK19GR 
2SK19GR 

2SC380Y 
2SC380Y 

2SC9830 
2SC9830 

 







CW R 


SSB T 

T & R 
T & R 












 

4.5 
0.1 
1.4 

10.2 

1.4 

1.7 
1.1 
0.2 
2.5 
2.6 
2.1 
1.5 
5.8 
5.0 
2.6 

11.1 

8.9 
8.2 
2.6 
6.0 
0.5 
1.0 
0.9 
0.7 
-50 
-79 

 

1.3 
9.8 
3.5 
7.9 

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 

 

4.7 
5.0 
0.7 


2.0 

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 


1.4 
1.4 
-50 
-79 

 


-  

 
 
 
 
 
 
 
 
 
 








 
 
 



 

3. IC 

Unit 

I.C. 

10 

11 

12 

13 

14 

 
GE 

 
Q 501 
MC 1496 

1.6  0.9  0.7 

1.4 

1.0 

4.8 

3.8 

3.8 

4.8 

 
 

 
Q 504 
MC 1496 

2.5  1.8  1.8 

2.5 

1.0 

5.1 

4.6 

4.6 

5.1 

 
 

 
Q 505 
TA7063P 

1.3  0.6 

0.7 

4.5 

7.2 

 
AF 

 
Q 410 
TA7204P 

0  5.8  12.0  7.1 

1.4 

10.4  11.3  5.6 

5.8 

5.5 

 

Notes 

(1) Unit: 

Volt 

(2) Voltage depends on 10M ohm Impedance of V.T.V.M 
(3) T:  Voltage at maximum TUNE output 
     R:  Voltage at receiving at no signal 
(4) Voltage in the parentheses means on AC and others on DC 
(5) 

E

:  Emitter 

C

Collector 

B

Base  

S

:  Source 

     

D

:  Drain   

G1

:  Gate 1  

G2

Gate 2 

(6) Mark * means final section of 2020Pwhich is modified to 10W for domestic marker use. 
 

 

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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