TSP #83 - Teardown & Repair of an Agilent 8164A Lightwave Measurement System

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In this episode Shahriar investigates a failure of an Agilent 8164A lightwave measurement system. A quick power-on test reveals the main power supply of the unit has failed and has caused catastrophic damage to some of the instrument modules.
After the teardown of the unit the power supply module is examined. Tracing the signal path from the switching transformers shows a pair of damages rectifier diodes. A new component with similar specifications is salvaged from a different power supply. After the installation, the unit can be powered on and detects all the installed modules. Most of the modules are functional, however the main tunable laser module fails alignment. The repair of that component is reserved for another video.
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