A Look Inside #15 - Faulty Audio Frequency Standard OCXO, Fixed! - Pt2

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A look inside / teardown of a faulty Audio Frequency Standard OCXO. I manage to trace and fix the problem in Part 2.

Datasheets:
* 74HC393 - Dual 4-bit binary ripple counter:
https://assets.nexperia.com/documents/data-sheet/74HC_HCT393.pdf
* 5351B - I2C-PROGRAMMABLE ANY-FREQUENCY CMOS CLOCKGENERATOR + VCXO:
https://www.silabs.com/documents/public/data-sheets/Si5351-B.pdf
* AD823 - Dual, 16 MHz, Rail-to-RailFET Input Amplifier:
https://www.analog.com/media/en/technical-documentation/data-sheets/AD823.pdf
* AD586 - High Precision5 V Reference:
https://www.analog.com/media/en/technical-documentation/data-sheets/AD586.pdf
* Atmel ATmega8A - 8-bit AVR Microcontroller:
http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-8159-8-bit-AVR-microcontroller-ATmega8A_summary.pdf
* HMC549MS8GE - DUAL OUTPUT LOW NOISEAMPLIFIER:
https://www.analog.com/media/en/technical-documentation/data-sheets/hmc549.pdf

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