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GK pink ring of doom

#25
agedhorse said:
No, it doesn't explain what you are seeing, you just don't know what you are looking at and are unwilling to listen to somebody who has 20 years or working directly with IcePower and their products. The most recent revision does not have these resistors installed, I looked at my docs and they are not supposed to be there. They are part of a high voltage bleeder or snubber that's not needed. I have one here without those resistors and it works perfectly fine.

You are new here, you asked for help, you got more than qualified help, and now you are arguing with me? C'mon, maybe you don't know as much as you think you do, that's fine, but don't argue with someone who understand more than you do about this.

Now, the most common causes for a new module not operating is either a missing BTL programming jumper (some versions have this and some don't, because some boards were configurable for dual single ended or BTL) and the other common cause is a failure of the installer to understand that the power supply needs to be jumper configured for 115/230V. Fortunately for you, you didn't realize this and your module is factory configured for 230V and must be changed to 115V in order to work properly in the US. This, of course, has nothing to do with the missing resistors.

Change the jumper (disconnect from the power source first).

Another common cause of damage to these modules is rough handling which physically damages components on the bottom of the PCB. I see a few modules a year returned by techs claiming defective when in fact they damaged the modules themselves.
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Testify, Brother!
 
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#27
B0314440-77AB-4A48-81A6-081B9466E051.jpeg
 
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#30
Brainmisspelled said:
It was the jumper thanks!
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Welcome to TB! It's been an invaluable resource to me for many years. There are some real heavy-hitters on here; you'll come to understand that.

And--as you've learned--Mr. Agedhorse is one of those cats. Anything he tells you about electronics, you can take to the bank. He happens to be the designer of the Mesa Subway amp line...
 
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#31
@Brainmisspelled, welcome to TalkBass. Please don't take our teasing of you too personally. We're really pretty much a cool group of people from all walks of life.

Usually when you get advice on the internet, it's just from some random person. We are VERY fortunate to have agedhorse being so active on this forum, as he is an incalculable wealth of wisdom, experience, and advice. There's no way you could have known who he is, so it's understandable that you were hesitant to take what he had to say as gospel. Please hang around and post some pics of your bass and talk the low end with us.
 
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#32
wintremute said:
@BrainmisspelledWe are VERY fortunate to have agedhorse being so active on this forum, as he is an incalculable wealth of wisdom, experience, and advice. There's no way you could have known who he is, so it's understandable that you were hesitant to take what he had to say as gospel. Please hang around and post some pics of your bass and talk the low end with us.
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Bingo! Hence why the OP argued with @agedhorse -- because the initial reply was that he thought that was the problem but, the follow-up response was more articulate on how to solve the problem. The OP has no idea that Agedhorse is an amplifier engineer with xx amount years in the industry. Had he known -- it would've been one and done. Gotta give some kudos to the OP, as he contacted GK and was instructed to go to the parts distributor for the correct part. However, GK should've known to instruct the customer about the jumper config.

These types of inquiries would be more efficient, constructive, and respectful if:

  • The mods created a "Ask an Amp Tech" forum and included a tag for certified techs.
  • Include a sticky or library of service manuals for all amps.
  • Add a disclaimer and instruct the user to contact a certified technician before posting a new thread if the problem requires an amp to be opened.
Props to AgedHorse for fixing this problem. However, I know it can be frustrating to answer or solve problems when so many piles up in an archaic fashion. We should really make a petition for the TB mods to build better resources for techs to answer questions and post PROVEN methods for repairs.

Knowledge is power (yadda, yadda), and sometimes these threads become clown shows when they don't need to be.
 
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#34
Raw N Low said:
Bingo! Hence why the OP argued with @agedhorse -- because the initial reply was that he thought that was the problem but, the follow-up response was more articulate on how to solve the problem. The OP has no idea that Agedhorse is an amplifier engineer with xx amount years in the industry. Had he known -- it would've been one and done. Gotta give some kudos to the OP, as he contacted GK and was instructed to go to the parts distributor for the correct part. However, GK should've known to instruct the customer about the jumper config.

These types of inquiries would be more efficient, constructive, and respectful if:

  • The mods created a "Ask an Amp Tech" forum and included a tag for certified techs.
  • Include a sticky or library of service manuals for all amps.
  • Add a disclaimer and instruct the user to contact a certified technician before posting a new thread if the problem requires an amp to be opened.
Props to AgedHorse for fixing this problem. However, I know it can be frustrating to answer or solve problems when so many piles up in an archaic fashion. We should really make a petition for the TB mods to build better resources for techs to answer questions and post PROVEN methods for repairs.

Knowledge is power (yadda, yadda), and sometimes these threads become clown shows when they don't need to be.
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Knowledge is power, France is bacon!
 
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#35
agedhorse said:
Commercial users have their information and affiliation posted in their profile that's under their avitar. Those of us who follow the rules have things clearly disclosed.
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Totally agree but, people never read anything no matter how big the print is. Making them go into an area designed for expertise psychologically puts them in a different state. Commerical tags could mean a number of different things that may or may not be related to technical design and expertise.

Sad to say, most people only read the metadata in the profile when calculating shipping for a classified deal.
 
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#39
Raw N Low said:
These types of inquiries would be more efficient, constructive, and respectful if:

  • The mods created a "Ask an Amp Tech" forum and included a tag for certified techs.
  • Include a sticky or library of service manuals for all amps.
  • Add a disclaimer and instruct the user to contact a certified technician before posting a new thread if the problem requires an amp to be opened.
Props to AgedHorse for fixing this problem. However, I know it can be frustrating to answer or solve problems when so many piles up in an archaic fashion. We should really make a petition for the TB mods to build better resources for techs to answer questions and post PROVEN methods for repairs.

Knowledge is power (yadda, yadda), and sometimes these threads become clown shows when they don't need to be.
Click to expand...

Lots of good ideas there IMO, but service manuals oftentimes aren't in the public domain, for a variety of reasons. ;)
 
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