2 years ago

140

A very interesting repair of an Agilent/Keysight U1273AX OLED display multimeter. It had two distinct unrelated faults.

Available for auction from 99cents: https://www.ebay.com.au/itm/225767769508
Ian Scott Johnston on The Amp Hour: https://theamphour.com/643-calibration-repair-with-ian-johnston/
Thin film ceramic hybrid resistor networks: https://www.youtube.com/watch?v=Rxy-VpSDPg4

Forum: https://www.eevblog.com/forum/blog/eevblog-1564-agilentkeysight-u1273ax-multimeter-repair/

00:00 - Faulty Agilent / Keysight U1273AX OLED display multimeter
01:36 - Battery leakage, OF COURSE!
04:26 - Bottom of PCB
05:47 - The OLED display
10:09 - Annoying voltage measurements
15:14 - At great expense to management, a new OLED
18:18 - Winner Winner Premature Dinner
20:19 - The Repair is over, right? RIGHT?
21:22 - Accuracy fault. Repair time again.
25:23 - Hybrid Thin Film Resistor Dividers
26:56 - Parallel contamination
29:44 - When in doubt, suck it off

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