Well I tried it in the int. Gate out and the external CV and gate and I accidentally plugged it in to the CV in. At the time I didn't think it should be a problem cause there shouldn't be any signal coming out of the CV in of this module I'm working on. It's just a Datasheet typical connection for the SSM2044.
So I was playing the audio through this filter and It was tough to tell if it was working because the VCA envelope is the same as the Filter envelope. So I ran my DR110 into the audio of my module and tried to control the CV with the MC202.
I tried the ext. CV and the gate and none of it was working. So I switched it back. I was connecting different lugs from the pots on the module just to see if this did anything for most of this. I looked and saw that it was plugged in to the CV in (by accident) so I switched it back to int.CV out.
I still couldn't get it to work so I thought I would plug the audio from the MC202 back in to see if the drums were just too fast to hear it working. It was busted so I posted up here.
The reason I thought I may have fed it -15V was cause the frequency pot has +/-15V attached to it. Now I didn't intentionally hook either of them to the V/oct or the CV pot but I am debugging this module, so...
Help! I blew up my MC202!! :( *Fixed! Thank You :)
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Please be positive and constructive with your questions and comments.
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- Posts: 3155
- Joined: Fri Feb 17, 2006 5:35 am
Re: Help! I blew up my MC202!! :(
check ic13 and ic18
was there any other connections between the two boards
was there any other connections between the two boards
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- Posts: 98
- Joined: Mon Jan 18, 2010 1:16 am
Re: Help! I blew up my MC202!! :(
Sorry for the delay. It's been a busy week.
IC 13 is a TL082 made by JRC? I can't find a datasheet on it.
Should I be checking the resistance to ground from the negative power rail or should I pull them?
IC 13 is a TL082 made by JRC? I can't find a datasheet on it.
Should I be checking the resistance to ground from the negative power rail or should I pull them?
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- Posts: 3155
- Joined: Fri Feb 17, 2006 5:35 am
Re: Help! I blew up my MC202!! :(
the tl082 is a very common opamp
so you can replace it with another one
you might as well measure the resistance first
so you can replace it with another one
you might as well measure the resistance first
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- Posts: 98
- Joined: Mon Jan 18, 2010 1:16 am
Re: Help! I blew up my MC202!! :(
What I meant was IC13 is JRC and it's either 082 or 2127 and I can't find the datasheet on either of them. It's labeled :
082
JRC
2127
on the chip.
After googling both of them (as JRC 082 or JRC 2127) I'm just assuming that it's a TL082 cause of the 082 on the chip. I have a fistful of TL082 but since I wasn't able to find the datasheet and confirm that it is just a different brand I wanted to doublecheck so I know which pins to check. If it's definitely a TL082 then I can just go ahead and replace it but I wanted to be sure
I guess I could check the schematics
Thanks
082
JRC
2127
on the chip.
After googling both of them (as JRC 082 or JRC 2127) I'm just assuming that it's a TL082 cause of the 082 on the chip. I have a fistful of TL082 but since I wasn't able to find the datasheet and confirm that it is just a different brand I wanted to doublecheck so I know which pins to check. If it's definitely a TL082 then I can just go ahead and replace it but I wanted to be sure
I guess I could check the schematics
Thanks
- aminoacid
- Posts: 352
- Joined: Tue Jun 20, 2006 5:27 am
Re: Help! I blew up my MC202!! :(
its a njm082
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- Posts: 98
- Joined: Mon Jan 18, 2010 1:16 am
Re: Help! I blew up my MC202!! :(
Busted out the ol' MC202 today... I pulled the power pin for the CEM3340, with a little solder braid.
Wouldn't you know it! Negative rail back online!!!!
So I swapped it out and Voila! MC202 Back In Action
Thank You!!!!
Wouldn't you know it! Negative rail back online!!!!
So I swapped it out and Voila! MC202 Back In Action
Thank You!!!!
- substyler
- Posts: 428
- Joined: Tue Dec 02, 2008 6:29 pm
Re: Help! I blew up my MC202!! :( *Fixed! Thank You :)
Great job!JRock wrote:Busted out the ol' MC202 today... I pulled the power pin for the CEM3340, with a little solder braid.
Wouldn't you know it! Negative rail back online!!!!
So I swapped it out and Voila! MC202 Back In Action
Thank You!!!!
Please be positive and constructive with your questions and comments.