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Motorola APX 3000 Detailed Service Manual

Motorola APX 3000
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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
52
IN2
GND1
GND2
GND3
GND4
OUT2
OUT1IN1
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
52
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
33PF4.7UF
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
43
5
68
2.7
33PF
4.7UF
BC858CD
R413
E401
C427
R404
Q402
C424
DC_RX_78_LNA_A
DC_RX_78_LNA_D
16
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
C434C431
DC_RX_78_LNA_J
DC_RX_78_LNA_I
16
2
43
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
52
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
52
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
43
VCC
GND
NC7WZ04
NC7WZ04
IF
IF
IF404
IF405
U408
U408
DC_LIN_3V
CTRL_RX_78_SW1
1
1
5
2
61
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
21
1
OUT

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Motorola APX 3000 Specifications

General IconGeneral
BrandMotorola
ModelAPX 3000
CategoryTwo-Way Radio
LanguageEnglish

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