Nautel XR6, Troubleshooting Manual, Page: 220 / 291

Issue 3.1 2014-05-07 SD-2
Figure SD-2: XR6/XR3 Transmitter - Exciter Stage (Sheet 2 of 4)
+15V
P20
GND
GND
GND
-15V
+5V
+5V
J7
J8
N/C
N/C
GND
N/C
GND
GND
N/C
GND
GND
GND
J1
PWB
A2A5
PWB
A2A4
A
A
RF
J1
N/C
N/C
N/C
N/C
Fc (B)
GND
N/C
N/C
Fc (A)
N/C
N/C
GND
J8
GND
GND
GND
GND
P20
P21
Fc (B)
Fc (A)
J10
NOTE:
P10
J3
P21
GND
GND
GND
N/C
N/C
J1
B
B
RF
PWB
A2A3
PWB
A2A2
J1
N/C
N/C
GND
N/C
N/C
GND
J7
GND
GND
GND
P29
RF
J3
FROM SHEET 3
37
38
35
32
33
J9
30
27
28
17
9
11
4
A11
19
J10
12
7
8
+48V SAMPLE
PA VOLTS
(N/U)
(N/U)
P8
+15V
+15V
INTERFACE
PWB
(PART 2 OF 3)
A2A1
19
16
17
P1 P1
14
PDM DRIVER
4
7
2
24
18
19
16
SYNTHESIZER
8
14
4
17
18
15
7
12
INTERPHASE 3
J3
1
19
23
17
14
15
5
J1
3
GND
PDM 1 (B)
N/C
PDM 2 (B)
GND
N/C
GND
Fpdm (B)
GND
N/C
J4
2Fpdm (B)
22
25
20
11
12
# HIGH BAND (B) -
9
# DDS INHIBIT (B) +
2
6
J2
GND
GND
PDM 2 (A)
N/C
N/C
Fpdm (A)
# PDM LATCH (A) +
N/C
GND
J3
DUMP (A)
2Fpdm (A) 25
21
12
13
10
# DDS INHIBIT (A) +
# HIGH BAND (A) - 6
7
J1
1
26
40
24
21
22
18
14
15
10
6
7
P8
1
10
20
6
3
4
P9
1
(N/U)
(N/U)
(N/U)
(N/U)
PDM 2
PDM 1
P21
22
PWB
DISTRIBUTION
(PART 2 OF 4)
# EXCITER B -
PHASE
(IBOC INPUT)
# RF DRIVE FAIL -
TEST
DRIVER
J14
J4 P10
RF DRIVE(B)
RF DRIVE (A)
39
34
29
36
31
13
3
20
5
PWB
16
(PART 1 OF 4)
11
S2020069 V3
(N/U)
(N/U)
# RF DRIVE FAIL -
# PM FAULT (A) -
# PM FAULT (B) -
(N/U)
+24V
P9
EXCITER
18
15
12
J4
INTERPHASE
3
1
23
J2
17
15
5
3
P1 P1
19
16
14
PDM DRIVER
4
2
24
SYNTHESIZER
18
16
8
4
GND
# PDM LATCH (B) +
DUMP (B)
21
13
10
7
1
GND
PDM 1 (A)
GND
22
20
11
9
2
J11 P12
23
25
16
8
19
12
25
2
9
5
2
(N/U)
# PM RESET -
J9
A11
J10
PWB
A15
BUFFER
J5
8
J10 P11
37
38
35
32
33
DC CURRENT SAMPLE
30
27
28 RF DRIVE VOLTS SAMPLE
17
9
11
# PM INSTALLED (B) -
# SPARK GAP SHUTBACK -
4 # PM INSTALLED (A) -
DISTRIBUTION
19
12
7
8
B+ SAMPLE 21
22
+15V (B)
GND
24
25
# INHIBIT PDM (B) -
+5V (B)
22
-15V (B)
AUDIO SHIELD (B)
13
20
B+ REF 2 (B)
2Fpdm (B)
10
# RESET PDM (B) -
CARRIER REF (B)
6
8
+5V (B)
# TUNE RF DRIVE (B) +
# B+ SEL 1 +
+15V (B)
INTERFACE
PWB
GND
(PART 3 OF 3)
A2A1
25
+5V (A)
+15V (A)
23
AUDIO SHIELD (A)
AUDIO (A)
# INHIBIT FAN PS +
20
21
2Fpdm (A)
-15V (A)
# EXCITER B -
11
# B+ SEL 2 +
CARRIER REF (A)
B+ REF 1 (A)
# HIGH BAND +
8
9
# RESET PDM (A) -
5
# TUNE RF DRIVE +
+5V (A)
EXT Fc (A)
GATE BIAS DRIVE
# TUNE RF DRIVE (A) +
+15V (A)
# RESET DDS (A) +
26
40
24
21
22
18
14
15
10
6
7
1
7
10
20
6 PWB (A2A6) (SEE SHEET 1)
TO J10 OF REMOTE INTERFACE
3
4
1
5
13
1
2
TO SHEET 3
39
34
29
36
31
13
3
20
5
16
11
AUDIO (B)
23
21
11
B+ REF 1 (B)
9
5
EXT Fc (B)
# RESET DDS (B) +
# INHIBIT PM (A) -
# INHIBIT PDM (A) -
EXCITER
# INHIBIT PM (B) -
24
22
# SOFTSTART -
13
B+ REF 2 (A)
10
6
J2 P23
23
25
16
8
19
12
25
2 J6 RF1-P4
9
5
2
IBOC MAGNITUDE INPUT CONNECTS
4
J1 P22
J7 RF2-P4
# TUNE SELECTED (B) -
IPM COMPENSATION (B)
# INHIBIT RF DRIVE FAULT +
# TUNE SELECTED (A) -
IPM COMPENSATION (A)