Figure 8-34. Mnus4000A/C/E Mixer And If Filter Circuits - Motorola APX 7000 Detailed Service Manual

Schematics, Boards Overlays, and Parts Lists: Transceiver (RF) Boards: UHF1/700–800 MHz
DC_LIN_1_8V
IN
U502
NC7WZ04
R597
0
3
IN
DIG_BAND_SELECT C505
0.1UF C504
100PF
L511
7.5NH
C510
TL_RX_B1_MIX_IN
1000PF
IN
U501
C502
AS211334
L501 4PF
L510 C507
C501 1
6.8NH
10NH 22PF J3
22PF
2
GND
3
J2
IN
C526 C527 C503
TL_RX_B2_MIX_IN
2.7PF 1.5PF 2.7PF
L508 L509
8.2NH 8.2NH
DC_LIN_3V
IN
T505
059248278
C528
TL_RX_LO
100PF
P1 S1
1 3
IN
S2
2
R512
C529
100K P2 S3
6 4
100PF
DNP
R501
5
NC
51
DNP
U502
NC7WZ04
4 1 6
NC
T503
059248278
6
V2 C511
100PF
S1
5 1 P1 3
J1
S2
4 2
V1
S3
6 P2 4
5
NC
U502
NC7WZ04
VCC
GND
C506 C508 C512
0.1UF 1000PF 33PF
U506
1 15
GND1 MIXBIAS
2 14
INB GND4
3 13
INA RF_M
4 12
LG2 RF_P
5 11
LG1 GND3
S1
3
S2
2
C509 C513
1000PF 100PF
S3
4
5
NC
C523 L503
220NH
470PF
1
IN
T504
C515
059248278
6.8PF
P1
1
R502
68
P2
6
L502 C514
47NH 43PF
E501
1 2
C517
R504 R506
0.1UF 150
3.3K
R503
C520
24K
1000PF
Q501 2 5 Q501
BC858CD BC858CD
R505
180K
C518
C521
1000PF
1000PF
L505 R507
FL501
L504 C524 C519
2.7K
31B01 150NH
390NH 27PF
18PF
4
OUT
C516
2.7PF

Figure 8-34. MNUS4000A/C/E Mixer and IF Filter Circuits

8-55
L506
150NH
C522 R511
TL_RX_IF_OUT
15PF 3.3
OUT
C525
1PF
R508
47
R509
10
Q503
1
BFR380F
L507
33NH