Author Topic: Rigol DG4102 Fun Gen output damaged by voltage overload - repaired  (Read 820 times)

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Offline tony t

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Accidently applied 24V to the output of my Rigol DG4102.

“OverLoad protect, The output is off!”  appeared.  I disconnected everything, powered cycled the unit but the output system is damaged.   Output is about at 80% level and weird offset voltage on output.

Looked at the rear side of PCB and measured all the resistors between channel 1 and 2 but cannot determine which component is bad. All components physically look okay.

Any advise?

« Last Edit: February 13, 2016, 08:34:29 AM by tony t »
 

Offline han

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Re: Rigol DG4102 Fun Gen output damaged
« Reply #1 on: February 12, 2016, 07:33:56 PM »
1. Try warranty first
2. If Warranty is not covered or the shipping is to expensive and you want to repair your own:
-Check the signal path backward, find where the signal start to distort
-Probably the diode limiting protection is damage and shorted.
 

Offline tony t

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Re: Rigol DG4102 Fun Gen output damaged by voltage overload - repaired
« Reply #2 on: February 13, 2016, 08:39:50 AM »
Okay, problem fixed.  Channel 2 working again.
Found a burnt out resistor, 31.4 ohm see image.
Replaced with 51 & 82 ohm  0602 resistor - 31.4 ohm
 


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