Electronics > Repair

Fluke 8050a Won't Read AC volts

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Who_Me?:
Using "COM" as ground:

1  5.87v
2  0
3  0
4  0
5  -4.95v
6  0
7  0

9  -1.46v
10 0

14 0
15 .7mv
16 1.7mv

19 0
20 0
21 4.50v
22 0
23 -2.0mv
24 -3.9mv
25 -1.8mv
26 0
27 0
28 0
29 -5.13

Pin #21 is also TP11...
So.....something on the "Hybrid RMS" board is faulty?  CA3046 or CA3140E as in the thread you referenced shows?

Who_Me?:
I removed the "Hybrid RMS" board (U32) and replaced CA3046 and CA3140E on it.  The meter now reads AC voltage.  Woohoo!

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