Figure 8-39. Receiver Front End Circuit - Motorola APX 3000 Detailed Service Manual
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Also See for APX 3000:
- Basic service manual (144 pages) ,
- User manual (104 pages) ,
- Manual (59 pages)
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8-68
IF401
1
IF
IN
IF402
1
IF
IN
C402
IF403
TL_RX_78
33PF
IF
1
IN
C404
33PF
IF405
IF
1
IN
U408
DC_LIN_3V
NC7WZ04
VCC
GND
CTRL_RX_78_SW1
U408
NC7WZ04
IF404
1
IF
1
6
IN
Figure 8-39. Receiver Front End Circuit
DC_LIN_1_8V_A
CTRL_RX_78_LNA_A = 3V (HIGH), LNA'S TURN ON
CTRL_RX_78_LNA_A
1
CTRL_RX_78_SW2 = 0V, 800 PATH SELECTED
CTRL_RX_78_SW1 = 0V, 700 PATH SELECTED
SW1 AND SW2 HAVE TO BE OPPOSITE
L407
7.5NH
RF_RX_8_SW1
RF_RX_8_F1OUT
C412
9.1PF
CTRL_RX_78_SW2
RF_RX_8_F1IN
RF_RX_8_SW2
U402
AS211334
R450
4
3
0
V1
J2
FL401
B4232
RF_RX_78_SW1
5
2
1
7
J1
GND
IN1
OUT1
3
5
IN2
OUT2
6
1
V2
J3
RF_RX_7_SW1
C413
47PF
RF_RX_7_F1IN
R451
0
CTRL_RX_78_SW1
RF_RX_7_F1OUT
CTRL_RX_78_SW1
C406
33PF
L408
10NH
RF_RX_8_SW3
RF_RX_8_SW4
RF_RX_8_F2IN
R454
CTRL_RX_78_SW2
0
RF_RX_8_F2OUT
U403
AS211334
R452
4
3
0
V1
J2
FL402
B4232
RF_RX_78_SW3
5
2
1
7
J1
GND
IN1
OUT1
3
5
OUT2
IN2
6
1
V2
J3
R455
0
RF_RX_7_SW3
R453
0
RF_RX_7_F2OUT
CTRL_RX_78_SW1
RF_RX_7_F2IN
C405
C407
33PF
33PF
U408
NC7WZ04
3
4
NC
CTRL_RX_78_SW2
E401
DC_RX_78_LNA_A
R403
R404
3.3K
68
DC_RX_78_LNA_D
Q401
MUN5212T
DC_RX_78_LNA_C
3
22K
R401
22K
C424
5
2
BC858CD
33PF
Q402
Q402
BC858CD
R402
82K
DC_RX_78_LNA_B
CTRL_RX_78_LNA_B
DC_RX_78_LNA_E
C421
C422
4.7UF
33PF
L402
10NH
RF_RX_78_LNA1_C
RF_RX_78_LNA1_A
L401
CTRL_RX_78_SW2
10NH
U404
AS211334
C425
1
6
5.1PF
J3
V2
RF_RX_78_LNA1_B
C426
RF_RX_78_SW2
1PF
2
5
1
U406
GND
J1
BFR380F
C423
C487
3
4
30PF
RF_RX_78_LNA1_F
33PF
J2
V1
RF_RX_78_LNA1_E
C484
R405
1PF
10
L403
3.3NH
RF_RX_7_SW2
C418
C416
33PF
R447
33PF
R456
10
0
D401
MMBD352
DNP
CTRL_RX_78_SW2
U405
AS211334
1
6
J3
V2
C430
RF_RX_78_LNA2_A
RF_RX_78_LNA2_B
30PF
2
5
GND
J1
3
4
J2
V1
C485
RF_RX_7_SW4
RF_RX_78_LNA2_E
1PF
CTRL_RX_78_SW1
C417
C419
R448
33PF
33PF
10
Schematics, Boards Overlays, and Parts Lists: Main Board Block: 700–800 MHz (84012501002)
C427
4.7UF
R413
2.7
E402
DC_RX_78_LNA_F
R406
0
DC_RX_78_LNA_G
R409
R410
DC_RX_78_LNA_H
3.3K
68
Q403
R407
BC858CD
22K
BC858CD
2
5
Q403
R408
82K
DC_RX_78_LNA_I
DC_RX_78_LNA_J
C428
C429
4.7UF
33PF
RF_RX_78_LNA2_F
L405
10NH
RF_RX_78_LNA2_C
C490
R412
1.5PF
L404
5.1
15NH
C488
C432
2.7PF
5.1PF
C433
L491
1PF
1
U407
8.2NH
L489
BFR380F
8.2NH
RF_RX_78_LNA2_D
R411
10
L406
2.4NH
R457
0
C431
C434
33PF
4.7UF
C492
2.7PF
IF406
1
IF
OUT
RF_RX_FE_B2_OUT
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