
4-44
VHF PCB 8486062B16 / Schematics
VHF (136-174 MHz) Transmitter
DATA CLK
CSX
UNSWB+
CSX_2_PA
UNSWB_LPLUS_2_PA
UNSW_LPLUS_3_PA
CLK_2_PA
DATA_2_PA
C3566
100pF
2
U3503
GND
3
POS
VOUT
12K
R3561
R3562
33K
C3561
.022uF
LM50C
5185963A15
330pF
C3501
300
R3501
R3503
300
TX_INJ_1_PA
18
R3502
TX_INJ
C3504
.022uF
33pF
C3502
5.6nH
L3501
470
R3505
330pF
C3505
C3503
33pF
68nH
L3503
.022uF
C3508
330pF
C3509
68nH
L3504
330pF
C3567
330K
NU
R3565
220pF
C3564
3300pF
C3562
3300pF
C3563
330K
R3564
.022uF
C3565
270K
R3563
RFOUT2
1
VCNTRL
14
VD1
2
VG1
3
VG2
12
GND4
13
8
NC1
9
NC2
10
NC3
15
NC4
16
RFIN
RFOUT1
6
7
EP
17
11
G2
GND1
4
GND2
5
GND3
09Z67
U3501
330pF
C3544
100
R3543
C3543
.022uF
330pF
C3542
5.6K
R3542
.022uF
C3541
R3541
NU
6.8K
L3511
18nH
L3512
11.03nH
47pF
C3512
30pF
C3513
3.9
R3507
R3506
3.9
L3513
7.66nH
470pF
C3514
100pF
C3517
C3516
1uF
22pF
C3519
100
R3513
R3512
3300pF
C3515
330pF
C3518
L3518
39nH
120
D
G
S
Q3501
HEATSINK
H3501
C3527
1.5pF
NU
120pF
C3523
18pF
C3524
L3521
7.66nH
220pF
C3521
.022uF
C3528
9.1pF
23.75nH
L3522
13.85nH
L3515
C3525
10pF
VR3501
10V
C3526
Microstrio
100
R3545
7.5K
R3548
100
R3544
BIAS_TUNING
330pF
C3546
R3546
33K
12K
R3547
.022uF
C3547
TP3502
3300pF
C3568
0
R3566
R3519
0.1
BEAD
L3519
C3570
470pF
C3571
RESET
RESET_1_PA
5V_2_PA
5V
BIAS_TUNING
330pF
UNSWB+
UNSWB+
10K
NU
R3570
R3569
NU
5.6K
NU
Q3561
UNSWB+
R3571
NU
120
120
R3572
120
R3573
C3569
.022uF
L3523
1uH
D3521
43.67nH
L3551
C3536
15pF
7.5pF
C3533
C3532
68pF
43.67nH
L3531
43.67nH
L3532
C3535
27pF
C3534
4.7pF
20pF
C3531
4
1
2
3
J3501
RF_JACK
GND
18pF
C3537
TAB5
5
1
TAB1
2
TAB2
3
TAB3
4
TAB4
ANTENNA_NUT
J3502
5.6pF
C3539
30.54nH
L3538
39
R3551
56pF
C3552
RX_IN_1_PA
RX_IN
C3551
68pF
D3551
7.66nH
L3552
7.5pF
C3550
19
17
20
18
24
22
21
23
14
16
15
11
10
12
13
9
30
31
26
28
25
32
27
29
6
2
1
7
8
4
3
5
TEMP
RSET
CLK
DATA
GND2
ANO
BPOS
CEX
VL
T1
INT
RFIN
CL
GND1
CI
CJ
VG
V10
V45
Q
QX
CQ
CQX
F168
VLIM
V5EXT
VAR1
VAR2
VAR3
NA
RS
RX
H99S-4
U3502
C3560
1uF
1
SHIELD
SH3502
SH3501
SHIELD
1
2
1
2
3
ZMY0130484-A
Summary of Contents for GP1280 Series
Page 1: ...Professional Radio GP Series VHF 136 174MHz Service Information Issue November 2004 ...
Page 24: ...2 14 THEORY OF OPERATION ...
Page 34: ...3 10 TROUBLESHOOTING CHARTS ...
Page 38: ...4 4 VHF PCB SCHEMATICS PARTS LISTS ...
Page 50: ...4 16 VHF PCB 8486062B12 Parts List Intentionally Left Blank ...
Page 54: ...4 20 VHF PCB 8486101B09 Schematics GP1280 Intentionally Left Blank ...
Page 64: ...4 30 VHF PCB 8486062B14 Parts List Intentionally Left Blank ...
Page 108: ...4 74 VHF PCB 8486473Z04 Radio Parts List Intentionally Left Blank ...