Figure 7-28. Hud4022A Frequency Generation Unit Vhf Receive Injection Schematic - Motorola ASTRO XTL 1500 Detailed Service Manual

Digtal, vhf/uhf range 1/uhf range 2/700–800 mhz
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7-36
LINE_B+
Rx_Buffer_2_EN
R3871
220.
R3870
330.
B(,1),A(,1)
R3868
5.6K
C3912
10.n
R3865
68.
B(,1),A(,1)
B(,1),A(,1)
RF_IN
C3915
470.p
R3854
R3855
100.
100.
R3869
4.700K

Figure 7-28. HUD4022A Frequency Generation Unit VHF Receive Injection Schematic

June 15, 2005
APCO VHF RX Buffer
B(,1),A(,1)
C3869
L3775
470.p
270nH
C3873
470.p
B(,1),A(,1)
C3924
10.n
Q3768
B(,1),A(,1)
R1
R2
R3872
100.
B(,1),A(,1)
C3930
C3910
L3784
470.p
100n
120.n
B(,1),A(,1)
R3864
18.
B(,1),A(,1)
B(,1),A(,1)
C3913
C3914
470.p
470.p
Q3769
R3828
R3857
R3856
100.
300.
300.
B(,1),A(,1)
C3911
R3873
22.
10.n
R3843
47.
NP
R3832
1.K
Q3767
R3846
4.700K
B(,1),A(,1)
NP
R3853
0.
B(,1),A(,1)
C3926
R3845
C3761
0.1uF
3.3K
470.p
B(,1),A(,1)
B(,1),A(,1)
B(,1),A(,1)
0
B(,1),A(,0)
L3781
B(,1),A(,1)
C3759
33.n
R3805
470.p
R3760
8.2K
C3877
C3786
2.K
C3804
NP
18.p
10.n
NP
15.p
NP
Q3762
R3796
1.K
NP
Schematics, Component Location Diagrams, and Parts Lists: HUD4022A (VHF) Main Board
B(,1),A(,1)
R3851
R3852
27.
27.
0
B(,1),A(,0)
C3870
C3925
470.p
0.1uF
L3783
1.0u
TP6771
1
TEST_POINT
B(,1),A(,1)
LO_INJ_HS
L3782
R3794
22.n
6.2
R3802
R3821
820.
820.
TO_CAPACITOR
73D02970C73-O
SHEET 21 OF 23
6815854H01-A

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