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Testing Methodology Discussion Questions and comments regarding the testing methodologies used on jonnyguru.com

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Old 05-28-2017
asf14tomcat asf14tomcat is offline
f14
 
Join Date: Sep 2016
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Default rigol DS2072 dead and hack

three days ago. I received my new ds2072a . and after couple time turn on and off . the power board is dead . ( I dont know why they use a soft button , feel very annoying and I like my 2 years old ds1074z use mechanical switch )

now time to check what's happents ( I cant send it back to get a replace. because too many process)
the power board have standby power and main power. look pretty same ATX psu . standby power supply power for soft switch, and main power turn on when the orange wire connected to ground . all caps is capxon KF series - yeah this is a rigol not a tektronix or keysight .
after checked I think the problems come from main PWM PFC controller NXP TEA1750 . so I desoldering this IC and order 2pcs from digikey ( wait again )


today. I too boring and really want to hack it . so I check a Power supply board from DS1000Z and luckily they have same voltage output (5 rails) but DS2000A series have PFC/standby stage ( not too important) . then time to change and see it working
how to hack DS2000A I read from this reply #69
http://www.eevblog.com/forum/testgea...941/#msg759941
I take 5minutes to completed this process
yeah DS2302A


now I still wait for some part from digikey to fix the power supply board. and change two diode schottky to higher value ( maybe help it work cooler) . I hope it working :
thanks for read

Last edited by asf14tomcat; 05-28-2017 at 09:09 AM.
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