TNP #19 – Teardown & Repair of a Keysight U1253B 50,000 Count True RMS OLED Handheld Multimeter

In this episode Shahriar takes a look a Keysight U1253B multimeter with a notorious problem of failed OLED screens. The OLED would degrade and stop working on some of these units. Since the original OLED model is almost impossible to find, replacement OLED would require a protocol translation layer. The replacement module uses an FPGA to achieve this.

The teardown of the unit as well as the repaired units are shown. The performance of the instrument is verified using a universal source and an 8.5-digit multimeter.

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