Figure 8-42. Nle4278D Uhf Range 1 Receiver Front End Circuit - Motorola ASTRO XTS 5000 Detailed Service Manual

Schematics, Board Overlays, and Parts Lists: Transceiver (RF) Boards
C400
V3A V5A
0.1uF
V5A
V3A
1
VAR3
R400
100K 3
RXIN
C412
15pF
D400
C415
2.2pF
D411
1SV305
C417
R411
9pF
10K
C419
TEST_POINT TEST_POINT T P405 TP401
0.1uF
DAC1
DAC2
L472
8.2nH
C471
8.2pF
L474
LOIN
18.0nH

Figure 8-42. NLE4278D UHF Range 1 Receiver Front End Circuit

6881094C31-E
V3A
U404
NC7WZ04
6
A1 Y1 at1l
A2 Y2 4
U401
AT267
4 1
V1 RFIO1
5 3
at1h
V2 RFIO2
C401
100pF
C410 C411 C404
1.8K
R431
4.7pF 4.7pF 100pF
C413 C414
22pF 15pF
C416 C434
2.2pF 4.7uF
D412
L410
C436
120nH
1SV305
L411 L412 C418
R412
17.52nH 17.52nH 9pF
33pF
10K
L433
C420
47.0nH
100pF
4 3
2
4
6 1 5
5 10
T471
NC NC
XFMR C600 C601
R471
4.7uF .01uF
75
C445
100pF
C476
2pF
V3A
L438
100nH
C430
TP402 TEST_POINT
100pF
R430
C431
180
3pF
R432
C432 C433 C450
LNAO
1.6K
8.2pF 6.8pF 4.7pF
R433
C452
2.7K
15pF
L430 L431
8.2nH 18.0nH
C455
C435
2.2pF
L432
D451
100nH
8.2pF
1SV305
Q430
C457 L452
BFS520
R451
9pF 17.52nH
L434
10K
33nH
R434
1K
C459
100pF
C473
L470
220nH
0.1uF
C474 C472
.01uF 100pF
U470
MX2072A
8 3
IFN
9
RFN IFP
12 4
RFP BBP
2 2
BDIV
3 6
LOIN NC1
6
NC2
7 1
NC3
XFMR
T473 L473
180nH
C602 C603
.01uF .01uF
C451
4.7pF
C453 C454
22pF 15pF
C456
2.2pF
D452
L451
TP403 T EST_POINT
120nH
R452
1SV305
10K C461
L453 C458
17.52nH 9pF
3pF
C460
0.1uF
V5A
TP404
TEST_POINT
C479
3pF
FL490
24B01
L490
1 4
IN OUT
620nH
C491
C490
5.1pF
4.7pF
8-65
L491
RXIF
620nH
November 16, 2006