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 Post subject: Re: B&K Precision E-200D signal generator not functioning
PostPosted: Jan Sat 13, 2018 11:48 pm 
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Location: Portland, TN, USA
That's good news!

Attachment:
E200D Audio Out to Modulator.jpg
E200D Audio Out to Modulator.jpg [ 19.49 KiB | Viewed 106 times ]


Now see if we still have audio at the wiper of R54 the MOD CAL pot, then at TP H.
Perhaps C40 has gone bad, so compare the levels on both sides of it.

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Want Hallicrafters S-76 with good cosmetics; Can fix electronics issues.


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 Post subject: Re: B&K Precision E-200D signal generator not functioning
PostPosted: Jan Sun 14, 2018 12:18 am 
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Nothing at the wiper of R54 (neg side of C40) or at TP H.


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 Post subject: Re: B&K Precision E-200D signal generator not functioning
PostPosted: Jan Sun 14, 2018 1:11 am 
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If you have it at TP Y and not at the wiper, then check at the top of the control. Then all the solder joints between those two points as well as the control itself. It could have a bad spot.

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 Post subject: Re: B&K Precision E-200D signal generator not functioning
PostPosted: Jan Sun 14, 2018 1:48 am 
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Joined: Mar Thu 03, 2011 8:53 pm
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Location: Davis, CA
I have tone at the top of R54. I sprayed R54 with a little deoxit and moved the control a little bit. I now have a tone at the wiper and at TP H. Tone levels on both sides of C40 are about the same. Is the problem resolved? I didn't have time this evening to put the shield back on the unit and see if I get a tone in a radio. Is there a need to check further or check the adjustment of R54?


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 Post subject: Re: B&K Precision E-200D signal generator not functioning
PostPosted: Jan Sun 14, 2018 2:13 am 
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It sounds like you found it!

You don't need to put the shield on to test it.

If you think the control is about the same place you found it, it will likely be OK for your purposes.

If you ever want to calibrate it for some reason, which I would doubt, there's a copy of the Service Manual, with the calibration procedures in it, on the "Free Stuff" site.

Looks like you're back in service again! Good work.

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Chuck K4CCW
Want Hallicrafters S-76 with good cosmetics; Can fix electronics issues.


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 Post subject: Re: B&K Precision E-200D signal generator not functioning
PostPosted: Jan Sun 14, 2018 3:36 am 
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Location: Waxahachie Texas
Nice job WoodchuckTN.

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 Post subject: Re: B&K Precision E-200D signal generator not functioning
PostPosted: Jan Sun 14, 2018 3:49 am 
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Thanks Crist.

I always like a story with a happy ending. :D

It was good to have a little project to occupy my brain while my daughter forbade me to venture out during our winter blast of snow and ice.

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 Post subject: Re: B&K Precision E-200D signal generator not functioning
PostPosted: Jan Sun 14, 2018 4:06 am 
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WoodchuckTN wrote:
Thanks Crist.

I always like a story with a happy ending. :D

It was good to have a little project to occupy my brain while my daughter forbade me to venture out during our winter blast of snow and ice.


A wise daughter indeed!

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 Post subject: Re: B&K Precision E-200D signal generator not functioning
PostPosted: Jan Mon 15, 2018 2:23 am 
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Location: Davis, CA
I checked the generator out today with a radio and can now hear the alignment tone. Thanks again to Chuck for his help.

Bob


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 Post subject: Re: B&K Precision E-200D signal generator not functioning
PostPosted: Jan Mon 15, 2018 3:00 am 
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It was my pleasure, Bob.

It's always good to be able to pay forward some of what I've received here on ARF.

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