Schematics And Block Diagrams; Sm-2150/Vhf Front End Schematic; Sm-2450/Uhf Front End Schematic; Sm-2000 Tcxo Schematic - Maxon FM Mobile radio SM-2000 Service Manual

4 3
C816
0.001
C813
6
33P
R804
R801
180
6.8K
(470)
5
C821 C817
L804
R800
270P 56P
6T 820
Q800
C807
MMBR951 C811
33P
L806 L805
100P
6T 6T
L803
6T
C822
C818 C815
C814 C806
39P 100P 150P
33P
D800
C812
39P KDS226
R803
R802 C808
2.2 3.3K
100P
SM-2150/VHF FRONT-END
770-110-0002 Rev. B
(VHF Band 2 shown)
Note 1: Schematics are for reference only. Reference designators and part values may not reflect product configuration.
Note 2: Refer to band chart for specific Front-End PCB assemblies.
REPLACEMENT MODULE SCHEMATICS
TH703
TH701
150K
10K
2
R702
*
R704
L800
*
C803
L802 C805
6T
6P 33P
6T
C800
560P
R701
R703
C802
1
100P *
*
C804
2
C801
39P
TH702
33K
L801
6T
1
R706
47K
R708 R710 R713
47K 2.2K 47K
D702
MMBV109
D701
MMBV
X701 C705
105
100pF
12.8MHz
LK701
Q701
R705
MMBR9426
R707
47K
47K
C702
C703
C704
100pF
91pF
180pF
R715
R709
R711 2.2K
C701 39K
4.7K
TC701
R712
100pF
20pF
39K
SM-2000 TCXO
770-100-0002 Rev. C
4
R714
2.2K
C819 C818 C816 C815
C821
27P 6.8P 6.8P 7P 15P
RF OUT
6
Q702
MMBR9426
5
C822 L806 C817 L805
C820
18P N/A 4T 18P
4T
C706
C823
L807
220pF
18P
4T
3
SM-2450/UHF FRONT-END
770-110-0001 Rev. B
L804
4T
R801
56K
C802
C813 C808 C806 C805 C803
C810
18P 20P 7P 7P 8P 11P
0.001
IN
1
Q801
2SC5084
2
C814
C809 C807 L802 C804
D801
12P 20P N/A 4T 20P
KDS226
C824
C812 L803 L801 C801
R802
4P 470P
4T 4T 10P
100
RX 5V
4 3
(UHF Band 2 shown)
Page-59-
December 98