Waukesha
Member
- 77
- 31
- 18
- Location
- Grand Rapids, MI
I’ve got the genset up and running; the problem is that the hz meter doesn’t work. I was able to test the frequency at the output lugs (and convenience receptacle), and use the “frequency adjuster” to adjust the set to 60hz. So I’m positive that I’m getting 60hz @120v in both places.
I used the schematics that I found on this website along with the troubleshooting guide in the TM to narrow my search down to the A7 (Frequency Transduzer) and M2 (Frequency Meter).
I tested the frequency meter using my Amprobe 530 set to check resistance, and the gauge freely moves from 55hz all the way to ~63hz and back down to home @55hz once the meter is removed.
I then disconnected the Line inputs from the A7 and hooked up known 60hz 120v house power to the A7. Nothing registered across the +/- on the A7.
Part numbers found on the box:
30554 ASSY 88-21136
Technology Research Corp
FSCM 60177
Part No. 19260
19237B
S/N: TQ27089
That leads me here, in search of your help. Does my testing above indicate a back A7 (Frequency Transducer) as I suspect? And 2, where can I source one? I’m going to drill out the rivets and take a peek inside to see if I can’t find a bad component within. However, I’m assuming it’s a potted mess in there.
Appreciate any insight that you can provide!
JT
I used the schematics that I found on this website along with the troubleshooting guide in the TM to narrow my search down to the A7 (Frequency Transduzer) and M2 (Frequency Meter).
I tested the frequency meter using my Amprobe 530 set to check resistance, and the gauge freely moves from 55hz all the way to ~63hz and back down to home @55hz once the meter is removed.
I then disconnected the Line inputs from the A7 and hooked up known 60hz 120v house power to the A7. Nothing registered across the +/- on the A7.
Part numbers found on the box:
30554 ASSY 88-21136
Technology Research Corp
FSCM 60177
Part No. 19260
19237B
S/N: TQ27089
That leads me here, in search of your help. Does my testing above indicate a back A7 (Frequency Transducer) as I suspect? And 2, where can I source one? I’m going to drill out the rivets and take a peek inside to see if I can’t find a bad component within. However, I’m assuming it’s a potted mess in there.
Appreciate any insight that you can provide!
JT
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