82 Reciter Fault Finding TB8100 Service Manual© Tait Electronics Limited September 20063.6 Visual InspectionThe following procedures are intended as a guide for quickly finding basicfaults in the reciter before proceeding to the more detailed checks. Thecircled numbers in the following instructions refer to Figure 3.5 on page 83.Task 1 —Check for PhysicalDamage, Missing orMisplacedComponents1. Remove the covers.2. Has the reciter been dropped? Inspect the covers, front and rearpanels, and heatsink for damage. Check each board for loose ormissing components. If the digital board or RF board is damaged,return the complete reciter to your nearest CSO for repair orreplacement.3. Check that the flexible connectors b are correctly positioned andlatched in their sockets (refer to Figure 5.2 on page 107).4. Check that all coaxial cables c d e are connected securely to thecorrect connectors.5. Check that all screws are in place and secured correctly. Refer to“Screw Torque Settings” on page 100.Task 2 —Check Quality ofSolder Joints1. Check the power supply circuitry f on the RF board for shorts ordry joints.2. Check the pins of the large ICs on the digital board for shorts orfaulty solder joints.3. Check the overall quality of the solder joints.Task 3 —Check RFConnectors1. Check the SMA connector solder joint g.2. Check that the nuts securing the BNC/TNC connectors h i aretightened correctly. Refer to “Screw Torque Settings” on page 100.
