Electronics > Repair
Please help, FLUKE 8920A Multimeter Repair
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Harry_22:
It is non flammable. :--
You need Contact Cleaner or Flux-Off or Isoclean spray.
daisizhou:
Can I separate this module from the motherboard underneath?

I mean use the resistance range of a digital multimeter to measure the resistance of the R241-JFET Q29 link and -15V.The fault is found in the module motherboard or the 8920a bottom motherboard below.
If I confirm which motherboard it is, I will clean that motherboard

Harry_22:
Yes, you can measure here but be careful. This is static sensitive JFET. Connect your multimeter ground wire first.
daisizhou:
Is this normal? Is this the problem?

Harry_22:
It can be dust under P102 connector around pin 5. I'm not sure that there should be OL at this point.

Unsolder R241 and check the trace resistance on other PCB as well as resistor itself.

 
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