Figure 7-26. Hud4022A Frequency Generation Unit Overall Schematic (Sheet 2 Of 2) - Motorola ASTRO XTL 1500 Detailed Service Manual

7-34
5V_Reg
B(,1),A(,1)
B(,1),A(,1)
L3751
560nH
C3750
C3806
100n
1uF
5V_Reg
IF6750
5V_Reg
TP6751
CLOCK
TEST_POINT
1 TP6750
TEST_POINT
1 B(,1),A(,1)
IF6752
SPI_CLK
TP6752
TEST_POINT
1
IF6753
DATA
SPI_DATA
TP6753
TEST_POINT
Syn_Sel
IF6754
1
SYN_SEL
IF6768
16_8_CONT
IF6756
16_8MHz
TP6754
1
TEST_POINT
IF6751
MOD_IN
IF6769 IF6770
FS_2 FS_3
IF6771 IF6772
DOUTA_2 DOUTA_3
IF6773 IF6774
CLKOUT_2 CLKOUT_3
IF6775 IF6776
PE_2 PE_3
IF6777 IF6778
PD_2 PD_3
IF6779 IF6780
PC_2 PC_3
F9.3V
IF6763
9.3V_1
L3752
560nH
C3811 C3751 C3820
IF6762
.022uF
100n 10uF
9.3V_2

Figure 7-26. HUD4022A Frequency Generation Unit Overall Schematic (Sheet 2 of 2)

June 15, 2005
3.0 Volt Regulator
U3750
F3.0v
LP3985
3
VEN
1 5
VIN
VOUT
4
BYPASS
GND
2
C3826 C3807
.01uF 1uF
0 B(,1),A(,0)
F3.0v
L3753
C3828
2.2uH
.01uF
B(,1),A(,1)
B(,1),A(,1)
C3766
100n
Y3750
R3754
OSC1672A
16.8MHz 100K
4
VDD
B(,1),A(,1) 1 3 B(,1),A(,1)
VCONT
FOUT
R3750
C3831
1K
1000pF
GND
2
R3753
100K
R3761
10K
B(,1),A(,1)
0 B(,1),A(,0)
R3756 R3776
R3758
120.K
15.K 56.K
C3808
100.n
B(,1),A(,1) C3825 100.n
B(,1),A(,1)
Q3755
B(,1),A(,1)
Q3750
B(,1),A(,1)
B(,1),A(,1)
R3759
R3763 R3775
R3779
47.K
47.K 1.K 1.5K
B(,1),A(,1)
B(,1),A(,1)
C3775
R3774 0
470.p
B(,1),A(,1)
B(,1),A(,1)
L3755
2.2uH
C3768
100n
R3755
100K
U3752
TC7SH04
VCC
L3754
1uH
B(,1),A(,1)
B(,1),A(,1) 2 4
R3767 1
B(,1),A(,1)
NC NC
1K
C3824
100pF
R3768
330.
B(,1),A(,1)
C3830
1000pF
1 TP6755
TEST_POINT
NC
NC
B(,1),A(,1)
B(,1),A(,1)
B(,1),A(,1)
R3778
B(,1),A(,1)
22.K
C3773 C3823 B(,1),A(,1)
470.p 10uF
B(,1),A(,1)
B(,1),A(,1)
B(,1),A(,1)
Q3756 C3813
470.p
C3821 C3753
10uF 100n
B(,1),A(,1)
Schematics, Component Location Diagrams, and Parts Lists: HUD4022A (VHF) Main Board
F3.0v 5V_Reg
B(,1),A(,1)
NP
R3784 R3785
0.
0.
0 B(,1),A(,0)
0 B(,1),A(,0)
L3756
B(,1),A(,1)
2.2uH
L3757
B(,1),A(,1)
2.2uH
C3769
100n
B(,1),A(,1)
C3762
100n
23
XTAL1
24
XTAL2 NC B(,1),A(,1)
8 19
CLK NC
FREFOUT B(,1),A(,1)
9 41 0 B(,1),A(,0)
CEX MODOUT
10 15
MODIN VMULT1 NC B(,1),A(,1)
7 14
DATA VMULT2 NC B(,1),A(,1)
B(,1),A(,1)
30 12
SFIN VMULT3
11
B(,1),A(,1)
VMULT4
U3751
35
B(,1),A(,1)
PVREF 63A27
21 48
B(,1),A(,1)
AUX1
VBPASS
1
AUX2
40 2
BIAS1 AUX3
39 3
BIAS2 AUX4
26 37
SFCAP TEST1 NC B(,1),A(,1)
27 38
TEST2
SFBASE NC B(,1),A(,1)
32
PREIN
43 B(,1),A(,1)
IOUT
45
0 B(,1),A(,0)
18
NC REFSEL IADAPT
4
42
NC CCOMP LOCK
46
ADAPTSW
28
17
NC SFOUT
NC1
16
29
NC NC2 INDMULT NC B(,1),A(,1)
25
31
NC NC3 WARP
R3836 C3752
51. 100n
B(,1),A(,1)
6815854H01-A