Watkins-Johnson Company WJ-8718-19/FE Instruction Manual page 9

WJ-8718-19/FE HF RECEIVER CONTENTS
TABLE OF CONTENTS (Cont'd)
SECTION IV
MAINTENANCE
Paragraph Page
4.1 General 4-1
4.2 Preventive Maintenance 4_1
4.2.1 Visual Inspection !!'.! 4-2
4.2.2 Cleaning WW 4-2
4.2.3 Lubrication 4_2
4.3 Receiver Checkout Procedure W 4-3
4.3.1 General WW!!!.!.!.....! 4-3
4.3.2 Test Equipment Required 4_4
4.3.3 Receiver Checkout Procedure Guideliness 4-4
4.3.4 Module Troubleshooting Procedures 4_16
4.3.4.1 Procedure Guidelines 4_lg
4.3.4.2 RF Filter Testing and Troubleshooting WWW!!!!!!!! 4-17
4.3.4.4 1st LO Synthesizer, FE-A1A1A1,Testing and Troubleshooting...!!'.! 4-18
4.3.4.5 VCO, FE-A1A1A2, Testing and Troubleshooting 4-19
4.3.4.6 Preselector, FE-A1A1A2, Testing and Troubleshooting ..."..* 4-21
4.3.4.7 2nd LO Synthesizer, FE-A1A2A1, Testing and Troubleshooting !! 4-22
4.3.4.8 2nd Converter, FE-A1A2A2, Testing and Troubleshooting 4-23
4.3.4.9 1st Converter, FE-A1A2A3, Testing and Troubleshooting .!! 4-24
4.3.4.10 RF Switch, FE-A2, Testing and Troubleshooting 4-26
4.3.4.11 1 MHz Filter, FE-A3, Testing and Troubleshooting 4-27
4.3.4.12 Input Converter Testing and Troubleshooting 4-27
4.3.4.13 10.7 MHz Filter Switch Testing and Troubleshooting .WW 4-29
4.3.4.14 10.7 MHz/455 kHz Converter Testing and Troubleshooting 4-30
4.3.4.15 455 kHz Filter Switch Testing and Troubleshooting 4-31
4.3.4.16 AGC Testing and Troubleshooting ..." 4-33
4.3.4.17 455 kHz Amplifier/AM Detector Testing and Troubleshooting 4-34
4.3.4.18 FM/CW/SSB Detector Testing and Troubleshooting 4-36
4.3.4.18.1 CW/SSB Detector Checkout Procedure 4-36
4.3.4.18.2 FM Detector Checkout Procedure 4-36
4.3.4.19 Audio Amplifier Testing and Troubleshooting 4-38
4.3.4.20 1st LO Synthesizer Testing and Troubleshooting 4-39
4.3.4.21 2nd LO Synthesizer Testing and Troubleshooting 4-41
4.3.4.22 3rd LO Synthesizer Testing and Troubleshooting 4-43
4.3.4.23 BFO Synthesizer testing and Troubleshooting 4-44
4.3.4.24 Time Base Testing and Troubleshooting 4-45
4.3.4.25 Synthesizer/Interface Testing and Troubleshooting 4-47
4.3.4.26 IF Interface Testing and Troubleshooting 4-50
4.3.4.27 Asynchronous I/O Testing and Troubleshooting 4-52
4.3.4.28 Serial I/O Buffer, A6A4, Testing and Troubleshooting 4-53
4.3.4.29 Sync Serial I/O, A6A5, Testing and Troubleshooting 4-54
4.3.4.30 Front Panel Encoder Bd., MFP-Al,Testing and Troubleshooting 4-55
4.3.4.31 Front Panel Audio Circuits, Testing and Troubleshooting 4-56
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