Figure 7-7. Hud4022A/Hud4025B Controller Power Control (Sheet 2 Of 2) - Motorola ASTRO Digital XTL 5000 Detailed Service Manual

Schematics, Component Location Diagrams, and Parts Lists: HUD4022A/HUD4025B (VHF) Main Board
A+
BATTERY CONNECTOR
J0950-1
1
1
VR0950
1 1
J0950-2 2 24V
2
C0997
68pF
A+
R0910
82K
1% *R0911*
12K
1%
VCC5
*R0912*
12K
1%
VCC5
LP3985
3
VEN
1
VIN
4
BYPASS
C0940 C0941 C0943
0.1uF 1uF .01uF
6881096C74-B
TP0950
TEST_POINT
9.3V REGULATOR
SW_A+
U0950
LM2941T
4 5
VIN VOUT
2 1
ON_OFF ADJ
R0951
GND 7.5K
C0950 C0951 R0923
3 C0953
0.1uF 1uF 100 1%
22uF
R0952
C0998
1.2K
100pF
1%
VCC5
C0920 0.1uF
*C0921*
470pF
U0965
4 5 LMV7219
1
TX_DISABLE
3
2
*R0913*
130K
*R0914*
1%
12K
VCC5
Q0960
10K
10K
10K
10K
LOOP_DISABLE
R0934
1K
R0930 R0931
20K 10K
RX_FILT_1
VCC3
U0962
9.3V_TX
5
VOUT
GND
C0937
2
0.1uF
C0942
U0960
4 13
1uF MC33204
TEST_POINT 14
TP0931
1 12
TP0930
11 C0930
TEST_POINT
100pF
C0985
0.1uF
TP0951
9.3V_TX_ REGULATOR
9.3V SW_A+
TEST_POINT
U0951
LM2941T
4 5
VIN VOUT
2 1
ON_OFF ADJ
R0954
7.5K
GND
R0908 R0924
C0955
C0954 3 1%
100
0.1uF 2.7
0.1uF
R0993
C0956
1.2K
22uF
1%
K9.1V_EN
DA_EN
SCKA
MOSIA
EEPOT_PC_U_D*
EEPOT_PC_INC*
*R0936* *R0937*
0 30K
VGBIAS_1
9.3V_TX
U0960
C0933
MC33204 4 2
100pF
1
TEST_POINT
1 3
TP0936
11
*R0938* *R0939*
0 30K
VGBIAS_2
9.3V_TX
U0960
MC33204 4 6
7 C0934
TEST_POINT
1 5
100pF
TP0938
11
TP0939
TEST_POINT
C0987
*R0940* *R0941*
0.1uF
0 30K
VGBIAS_3
9.3V_TX
U0960
MC33204 4 9
TEST_POINT 8
1 10
TP0940 C0935
11
TP0941
100pF
TEST_POINT
C0986
0.1uF
Q0952
8
9.3V_TX K9.1V
7
6
3
5
2
1
C0982
R0955
22uF 4
100K
Q0951
47K
47K
TP0937
TEST_POINT
C0984
0.1uF
*R0947*
0
*C0952*
0.1uF
VCC3
C0981
0.1uF
U0959
MAX5259
4
2 VDD
PWR_SET*
OUTA
1
CURR_LIM_SET*
OUTB
16
VGBIAS_1* VCC3
OUTC
15
VGBIAS_2*
OUTD
VGBIAS_3* 7 5
OUTE REF
8 11
RX_FILT_1*
OUTF CS
9
TEMP_1* 6
OUTG LDAC NC
10 12
OUTH SCLK
14
13
NC DOUT DIN
GND
3

Figure 7-7. HUD4022A/HUD4025B Controller Power Control (Sheet 2 of 2)

7-9
May 25, 2005