Figure 7-28. Hud4022A Rf Power Amplifier (Rf Pa) Schematic (Sheet 1 Of 2) - Motorola ASTRO Digital XTL 5000 Detailed Service Manual

7-30
RFPA/FGU
INTERFACE
C3500
470pF
IF3500
TX_INJ
IF3501
K9.1V_FGU
L3501
68nH
C3517
C3501
RFPA/POWER CONTROL
470pF .01uF
INTERFACE
IF3502
RFPA_CNTRL
IF3503
K9.1V
IF3504
VGBIAS1
IF3505
VGBIAS2
IF3506
VGBIAS3 NC
IF3507
A+_1
IF3508
R3507
A+_2
10.
IF3509
A+_3
C3560
IF3510
10.u
A+_4
IF3511
VTEMP
IF3512
VCURRENT
IF3513
VFORWARD
IF3514
VREVERSE

Figure 7-28. HUD4022A RF Power Amplifier (RF PA) Schematic (Sheet 1 of 2)

May 25, 2005
L3503
C3506
.01uF 68nH
C3564 R3561
1.n 300.
C3520 L3520
U3550
30C65 10pF 18.5nH
6
16
RFIN RFOUT1
7
1
VCNTRL RFOUT2
2
14
VD1 VG1
3
11
G2
VG2
8
NC1
9
NC2
10
NC3 C3508 R3502 C3511 C3521
C3503 15
NC4
1.n 22pF
1.n 5.6K
33pF
L3502
R3501
4.22nH
100
C3522
470pF
C3505
C3504
.01uF
33pF
Schematics, Component Location Diagrams, and Parts Lists: HUD4022A/HUD4025B (VHF) Main Board
M3520
R3520
HEATSINK
56
1
POS
R3538
R3521
3.9
56
R3537
R3522
56 Q3530 3.9
R3523
56 R3536
3.9
C3532
R3524 62pF
1K
C3534
R3535
L3531 470pF
3.9
12.5nH
C3533
62pF
C3531
470pF R3534
3.9
C3537 56pF
R3533
3.9
L3530
R3531
1019447
10
R3532
C3530 0.1uF
3.9
R3530 C3536 62.00p
0
U3560
LM50
1
C3561 C3562
POS
0.1uF 0.1uF
2
VOUT
U3561
GND
INA138
3
VPOS
1
OUT
GND
R3560
100K
1 %
M3542
HEATSINK
Q3550
C3555
110pF
C3552 C3553 C3554
62.p 62.p 110pF
L3551
R3540
17nH
1K
R3551
C3535 10
L3550 L3549
470pF
1019447 1019447
C3550
R3550
C3548
5m
C3563
1000pF
5
3
VINPOS
4
VINNEG
2
RFPA/OUTPUT NETWORK
C3557
C3559
3.3pF INTERFACE
470pF
IF3540
L3552
RFPA_OUT
17nH
C3556 C3558 IF3541
3.3pF 47pF
K9.1V_ON
IF3542
C3549
56pF
VFORWARD_ON
IF3543
C3551
470pF
VREVERSE_ON
0.1uF
62.00p
73D02970C73-O
SHEET 14 OF 23
6881096C74-B