8-68
Schematics, Boards Overlays, and Parts Lists
: Main Board Block: 700–800 MHz (84012501002)
Figure 8-39. Receiver Front End Circuit
1
IF
IF
IF402
IF401
1
1
IN
IN
CTRL_RX_78_LNA_A = 3V (HIGH), LNA'S TURN ON
CTRL_RX_78_LNA_A
DC_LIN_1_8V_A
CTRL_RX_78_SW1 = 0V, 700 PATH SELECTED
SW1 AND SW2 HAVE TO BE OPPOSITE
CTRL_RX_78_SW2 = 0V, 800 PATH SELECTED
IF
IF403
TL_RX_78
1
IN
J3
GND
J2
V2
J1
V1
33PF
33PF
0
AS211334
33PF
0
R450
R451
U402
C404
C406
C402
RF_RX_78_SW1
CTRL_RX_78_SW2
RF_RX_8_SW1
RF_RX_8_F1IN
CTRL_RX_78_SW1
RF_RX_7_F1IN
RF_RX_7_SW1
6
4
1
3
5
2
IN2
GND1
GND2
GND3
GND4
OUT2
OUT1
IN1
B4232
FL401
RF_RX_7_F1OUT
5
7
3
1
8
6
4
2
J3
GND
J2
V2
J1
V1
7.5NH
33PF
33PF
10NH
47PF
9.1PF
33PF
AS211334
C487
L408
L407
U404
C418
C416
C413
C412
CTRL_RX_78_SW1
RF_RX_7_SW2
RF_RX_8_F1OUT
RF_RX_8_SW2
CTRL_RX_78_SW2
6
4
1
3
5
2
30PF
1PF
10
R447
C484
C423
10NH
3.3NH
10
0
1PF
R456
L403
L401
R405
C426
RF_RX_78_LNA1_E
RF_RX_78_LNA1_F
RF_RX_78_SW2
RF_RX_78_LNA1_B
23
5.1PF
BFR380F
0
10NH
U406
L402
R406
C425
RF_RX_78_LNA1_A
RF_RX_78_LNA1_C
33PF
4.7UF
C421
C422
DC_RX_78_LNA_B
DC_RX_78_LNA_E
CTRL_RX_78_LNA_B
22K
22K
82K
BC858CD
22K
3.3K
MUN5212T
Q401
R403
R401
R402
Q402
DC_RX_78_LNA_C
2
3
1
4
3
5
68
2.7
33PF
4.7UF
BC858CD
R413
E401
C427
R404
Q402
C424
DC_RX_78_LNA_A
DC_RX_78_LNA_D
1
6
2
68
3.3K
E402
R409
R410
DC_RX_78_LNA_G
DC_RX_78_LNA_H
DC_RX_78_LNA_F
22K
BC858CD
BC858CD
4.7UF
82K
33PF
R408
R407
Q403
Q403
C434
C431
DC_RX_78_LNA_J
DC_RX_78_LNA_I
1
6
2
4
3
5
33PF
4.7UF
C428
C429
J3
GND
J2
V2
J1
V1
0
AS211334
0
R455
R454
U405
CTRL_RX_78_SW2
RF_RX_78_LNA2_A
RF_RX_8_SW4
RF_RX_7_SW4
6
4
1
3
5
2
33PF
33PF
C417
C419
CTRL_RX_78_SW1
J3
GND
J2
V2
J1
V1
0
0
AS211334
33PF
R453
R452
C407
U403
CTRL_RX_78_SW2
RF_RX_8_SW3
RF_RX_7_SW3
RF_RX_78_SW3
RF_RX_7_F2IN
RF_RX_8_F2IN
RF_RX_8_F2OUT
CTRL_RX_78_SW1
6
4
1
3
5
2
IN2
GND1
GND2
GND3
GND4
OUT2
OUT1
IN1
B4232
FL402
RF_RX_7_F2OUT
5
7
3
1
8
6
4
2
NC
NC7WZ04
U408
CTRL_RX_78_SW2
4
3
VCC
GND
NC7WZ04
NC7WZ04
IF
IF
IF404
IF405
U408
U408
DC_LIN_3V
CTRL_RX_78_SW1
1
1
5
2
6
1
IN
IN
33PF
C405
MMBD352
DNP
D401
2
3
1
30PF
1PF
10
R448
C485
C430
RF_RX_78_LNA2_B
RF_RX_78_LNA2_E
2.4NH
0
15NH
5.1PF
1PF
BFR380F
5.1
10NH
10
R457
L406
R411
L404
U407
C432
C433
L405
R412
RF_RX_78_LNA2_F
RF_RX_78_LNA2_D
RF_RX_78_LNA2_C
23
1
8.2NH
1.5PF
IF
2.7PF
2.7PF
8.2NH
C492
C490
L491
C488
L489
IF406
RF_RX_FE_B2_OUT
2
1
1
OUT
Summary of Contents for Astro APX 3000
Page 1: ...APXTM TWO WAY RADIOS APX 3000 DETAILED SERVICE MANUAL ...
Page 2: ......
Page 4: ...Notes ...
Page 6: ...vi Document History Notes ...
Page 10: ...x Table of Contents Notes ...
Page 12: ...xii List of Tables Notes ...
Page 18: ...xviii List of Figures Notes ...
Page 22: ...xxii CommercialWarranty Notes ...
Page 46: ...3 20 Theory of Operation Main Board Notes ...
Page 84: ...3 58 Theory of Operation Bluetooth Notes ...
Page 208: ...6 64 Troubleshooting Waveforms LF CW on Spectrum Analyzer Notes ...
Page 222: ...7 14 Troubleshooting Tables List of Board and IC Signals Notes ...
Page 282: ...8 60 Schematics Boards Overlays and Parts Lists Main Board Block UHF1 84012513001_A Notes ...
Page 390: ...8 168 Schematics Boards Overlays and Parts Lists Main Board Block VHF 84012512001_A Notes ...
Page 456: ...9 8 Debugging Fixture Powering up Covert Board Notes ...
Page 468: ...Glossary 10 Glossary Notes ...
Page 472: ...Index 4 Index Notes ...
Page 473: ......