EEVblog Electronics Community Forum

Electronics => Beginners => Topic started by: JLM on June 06, 2018, 02:42:23 pm

Title: Rigol DM3068 repair question
Post by: JLM on June 06, 2018, 02:42:23 pm

 I am trying to repair a desktop multi meter that fails on virtually every self test. One of the voltage regulators, L7915CV, seems to be really hot and makes a smell. I removed it from the circuit and tested. The output is -17.02 V (input -25v). Is this within spec, or can the 2 volt different account for my problems? Note that the unit powered on and got the same test results even with the voltage regulator not on the board.

Title: Re: Rigol DM3068 repair question
Post by: wraper on June 06, 2018, 03:07:06 pm

No way 17V is within spec.