Figure 8-16. Mnur4001B/D Mixer And If Filter Circuits - Motorola APX 7000 Detailed Service Manual

Schematics, Boards Overlays, and Parts Lists: Transceiver (RF) Boards: VHF/700–800
IN
U502
NC7WZ04
DIG_BAND_SELECT
3
IN
R597
C505
0
0.1UF C504
100PF
C502
TL_RX_B1_MIX_IN 1000PF
IN
U501
L501
AS211334
24NH
C501
1
2PF
J3
DNP
2
GND
TL_RX_B2_MIX_IN 3
J2
IN
C526 C527 C503
2.7PF 1.5PF 2.7PF
L508 L509
8.2NH 8.2NH
DC_LIN_3V
IN
C599
TL_RX_LO 100PF
IN
DC_LIN_1_8V
U502
NC7WZ04
4 1 6
NC
T503
6
C511
V2
100PF
P1 S1
1
5 3
J1
S2
4 2
V1
P2 S3
6
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
C507
220PF
R501
51
S1
3
S2
2
C509 C513
1000PF 100PF
S3
4
5
NC
L503
220NH
1
IN
C523
C515
470PF
T504
6.8PF
P1
1
R502
68
P2
6
L502 C514
47NH 43PF
E501
1 2
R504 R506
C517
3.3K 150
0.1UF
R503
24K C520
2 5 Q501 1000PF
Q501
BC858CD
BC858CD
R505
180K
C518 C521
1000PF 1000PF
FL501
R507
L505
C524
L504 C519
31B01
2.7K
150NH
27PF
390NH 18PF
4 1
OUT
C516
2.7PF

Figure 8-16. MNUR4001B/D Mixer and IF Filter Circuits

8-17
L506
150NH
R511
2.7 TL_RX_IF_OUT
OUT
C522
15PF C525
3.3PF
R508
15
R509
10
Q503
BFR380F
L507
33NH