BK Precision 879B Err E02 Repair
While performing in-circuit ESR testing, I took a break for a cup of coffee. Upon returning to the project, I encountered an issue. As soon as I hooked it up, there was a sudden discharge, and I realized I had inadvertently taken out my LCR meter, the infamous BK Precision 879B displaying an Err E02. A quick Google search, including guidance from the EEVBlog and BK Precision’s page, suggested checking Fuse 200. Fortunately, Fuse 200 was intact. The EEV Blog post further directed me to inspect the -5V rail, and sure enough, it was shorted.
The Voltage Inverter U603 a TPS60400DBVT was the problem.
I orderd some then I got distracted with other jobs not nrequiring the LCR Meter and I misplaced them so had to order more thjis time i got right to it so i would not misplace the small pack again. so now it was time Remove the TPS60400DBVT
Clean Up The Flux, and tin the small SOT23-5 pads of U603
Installed New TPS60400DBVT in U603 Chewcked the -5V TPO and checked good no short.
Install a fresh 9v and Power it on for a Function Check all Done. LCR Meter is Back to Working Order! Total time for fix about 10min waiting for parts 2 weeks.
Next weeks control boards that will be in will be a fast fix now the LCR is up and running will prob cut 3-4 days off my Mail In Repair Queue.
Last Updated on November 23, 2023 by Steven Rhine