Figure 7-23. Hud4022A Controller Power Control (Sheet 1 Of 2) - Motorola ASTRO XTL 1500 Detailed Service Manual

Schematics, Component Location Diagrams, and Parts Lists: HUD4022A (VHF) Main Board
6815854H01-A
*R0980*
VCC3
C0959
0
0.1uF
U0952
3 MAX5452
R0984
1 4
VDD
0
EEPOT_4_CS* CS1 W1
10 7
EEPOT_5_CS* CS2 W2
R0985
2 5
0
U_D L1
9 6
INC L2
GND
8
R0964
*R0986*
24K 0
2
3
*C0962*
100pF
VREVERSE
VCC3
C0979
6
0.1uF
5
C0963
100pF
VCC3
U0955
*Q0953*
9 4 MC33204
8
10 47K
C0964 PWR_RANGE
11
100pF 47K
TP0960
TP0961
TEST_POINT
TEST_POINT
VFORWARD
R0981
R0982
2.7K 100K
1 TP0959
TEST_POINT
9.3V_TX
U0957
2 4 MC33204
C0975 1
3
100pF
11
TP0962
TEST_POINT
VTEMP
TP0963
TEST_POINT
TP0964
TEST_POINT
VCURRENT
1 TP0952
TEST_POINT
AD_EN
R0965
R0963
0
24K
9.3V_TX R0966
U0956
0
4 LMC6484
1
C0965
100pF
11
A+
*R0948*
R0950
1K
0
R0967
100K
VCC3
1%
TP0953
U0955
4
MC33204 TEST_POINT
7
*C0923*
11
100pF
*D0954*
R0953 R0935
0
C0969
100pF
*R0969* *R0970*
10K 24K
*R0971*
10K
*R0972*
*R0973*
9.3V_TX 1% 10K
12K C0968
1%
100pF
U0956
6 4 LMC6484
7 1
5 1
*C0967*
11 TP0958 TEST_POINT
100pF
TEST_POINT TP0956
R0978
10K
9.3V_TX
R0983 R0915
C0957 0.1uF
1K 1K
R0960
9 4 Q0955
20K
8
S
10 G
11
U0957
D
*R0946*
MC33204
R0996
100K
10K 1%
9.3V_TX
R0998 R0997 VCC3
10K 1.2K
*R0992*
6 4
100K
R0994
1% C0976
1% 1% 5
3.9K
100pF 11
R0999
10K
R0995
1%
1.2K
1%
R0988 R0989
10K 56K
9.3V_TX
U0957
13 4
MC33204
14
12
C0978
11
100pF
U0954
MC74VHC1G00
1
4
2
C0960
VCC3
0.1uF
REVERSE_POWER
FORWARD_POWER
VCC3 VTEMP
R0987
VCURRENT
0
U0955 A+
13 4
MC33204 VCONTROL
14
12
11
R0979
VCC3
0
R0961 R0962
100K 100K
U0955
2 4 MC33204
1
3
C0966
11
R0968
100pF
10K
1%
TP0954
TEST_POINT
R0991
0
LOOP_DISABLE
10K
*C0924*
.047uF
D0950
C0922 TP0955
1 C0972
TEST_POINT
100pF
0.1uF
D0951
C0970
100pF
VCC3 9.3V_TX
*R0976*
1K
U0956
9 4 LMC6484
R0974 8
10K 10
*C0971*
11
1%
100pF
R0975
10K
1%
D0952 *R0933*
C0983
4.7K
U0958
100pF
R0932
MC74VHC1G00
0
1
TX_DISABLE
4
2
PA_EN
U0957
MC33204
7
VCC3 VCC3
C0974 C0936
0.1uF 0.1uF
5 5
VCC VCC
U0958 GND U0954
GND
3 3
PWR_GND PWR_GND
1
TP0957
TEST_POINT
R0990
5.1K

Figure 7-23. HUD4022A Controller Power Control (Sheet 1 of 2)

7-31
VCC3
C0961 0.1uF
4.7uF
C0945
20
18
VDD
SCLK
U0963
19 NC7SZ125
CONVST
17 16
4
2
DIN DOUT MISOA
15
RFS
14
1
TFS
2
CREF
1
VREF
U0953
12 AD7812
A0
3
VIN1
5
9.3V_TX
VIN2
6
VIN3
7
VIN4
8
VIN5
9
*R0942*
VIN6
10
8.2K
VIN7
11
VIN8
*R0943*
20K
R0944
10K
*R0945*
33K
9.3V_TX 9.3V_TX
4 13
14
12
11
C0980
0.1uF
U0956
LMC6484
9.3V_TX
*R0916*
680
RFPA_CNTRL
*R0977*
*R0917*
100
6.2
C0973
1uF TP0942
TEST_POINT
1
Q0954
D
G
S
VCC2.85
U0963
PWR_GND
5
VCC
GND
C0944
3
0.1uF
73D02970C73-O
SHEET 7 OF 23
June 15, 2005