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PAMS
Technical Documentation
NSE–3
Disassembly & Troubleshooting Instructions
Page 23
Original, 11/97
Receiver Fault (3)
2nd IF
13 MHz
N620 pin 8(J542),
SL: – 28 dBm
N620 pin 44,
SL: – 19 dBm
N620 pin 47(J510),
~2.8V
Check
VRX supply voltage
N620 pin 53(J554),
~1.2V
Check RXC control voltage
from
COBBA
pin 18
Change N620
VHFLO
Z620 input(J540),
SL: –26 dBm
Check R626 and soldered
joints
Z620 output(J538),
SL: –28 dBm
Check soldered joints, if OK
change Z620
N620 pin 34, SL: –36 dBm
and pin 35, SL: –33 dBm
N620 pin 34 and 35,
DC–level, ~1.4V
Change
N620
Check R628 and R629
N620 pin 29 and 30,
SL: – 29 dBm
N250 pin 22 and 23,
SL: –29 dBm
N620 pin 29 and 30,
DC–level ~1V
Change N620
Check soldered joints at N620
and N250, if OK change N620
Check connections between
N620 and N250
COBBA
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
Summary of Contents for NSE-3 SERIES
Page 3: ...NSE 3 SeriesTransceivers PAMS Technical Documentation Original 11 97 Chapter 1 Foreword ...
Page 7: ...NSE 3 Series Transceivers PAMS Technical Documentation Original 11 97 Chapter 3 System Module ...
Page 80: ...PAMS Technical Documentation Original 11 97 Chapter 4 UI Module UE4 ...
Page 83: ...PAMS Technical Documentation UI Module UE4 Page 4 4 Original 11 97 Baseband Block Diagram ...
Page 99: ...UIF Module UE4 Original 11 97 4 A3 4 Layout Diagram of UE4 Version 10 ...
Page 100: ...PAMS Technical Documentation Original 08 96 Appendix 1 TRANSCEIVER NSE 3NX ...
Page 139: ...PAMS Technical Documentation Original 11 97 HFU 2 ...
Page 146: ...PAMS Technical Documentation HFU 2 Page 8 Original 11 97 Exploded View of HFU 2 3 2 4 5 1 ...
Page 153: ...PAMS Technical Documentation HFU 2 Page 15 Original 11 97 This page intentionally left blank ...
Page 154: ...PAMS Technical Documentation Original 11 97 CARK 64 Installation Guide ...
Page 158: ...PAMS Technical Documentation CARK 64 Page 5 Original 11 97 This page intentionally left blank ...
Page 159: ...PAMS Technical Documentation Original 11 97 CARK 91 Installation Guide ...
Page 167: ...PAMS Technical Documentation CARK 91 Page 9 Original 11 97 This page intentionally left blank ...
Page 168: ...NSE K B 3 Series Transceivers PAMS Technical Documentation Original 11 97 Service Tools ...
Page 193: ...NSE 3 System Module UP8T Original 11 97 3 A3 1 Block Diagram of System RF Blocks ...
Page 203: ...NSE 3 Series Transceivers PAMS Technical Documentation Original 11 97 Tuning Instructions ...