R type 2, quiet sound
- thomj
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R type 2, quiet sound
I've been loaned an original r type 2 pcb. The sound on it works but is quiet. The volume pot doesn't make it louder or quieter at all, but if you turn it all the way down it'll suddenly mute it.
I thought perhaps it may be a pot problem but there are some empty component spots, wanted to check nothing was missing
Anyone know if any of those spots should be filled?
I thought perhaps it may be a pot problem but there are some empty component spots, wanted to check nothing was missing
Anyone know if any of those spots should be filled?
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Re: R type 2, quiet sound
Don't know about R-Type 2, but my Kengo board (same pcb) looks identical to your R2. And the sound pot functions properly on mine.
Stronger then your average deadite.
- thomj
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Re: R type 2, quiet sound
I guess I should try and meter the pot then if thee don't look to be any missing bits. Thanks
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Re: R type 2, quiet sound
First check that the boardset is getting +12 volts DC, as well as -5 volts DC.
Then check the resistance of the pot - turn the boardset off, flip it over and crank the pot all one way - check the resistance. Crank it all the other way - check resistance again. I can't remember off the top of my head what resistance value the pot is - it will be a few K though.
If that's okay then I'd personally check the electrolytic caps (the green caps) and if they check out then check the sound going INTO the amp (this can be checked with an oscilloscope or a crystal earpiece).
Please report back here with your findings.
Then check the resistance of the pot - turn the boardset off, flip it over and crank the pot all one way - check the resistance. Crank it all the other way - check resistance again. I can't remember off the top of my head what resistance value the pot is - it will be a few K though.
If that's okay then I'd personally check the electrolytic caps (the green caps) and if they check out then check the sound going INTO the amp (this can be checked with an oscilloscope or a crystal earpiece).
Please report back here with your findings.
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- thomj
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Re: R type 2, quiet sound
The volume pot's dodgy. Thanks for the help.
Deadite, could you please see what the value of your volume pot is?
Deadite, could you please see what the value of your volume pot is?
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Re: R type 2, quiet sound
Sure, if you can explain what you mean exactly..
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Re: R type 2, quiet sound
He means the resistance value of the pot.
Afraid I don't have one here to check.
Afraid I don't have one here to check.
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Re: R type 2, quiet sound
No sarcasm intended or implied - just saying. Don't get offended.kernow wrote:VectorGlow wrote:He means the resistance value of the pot.
Afraid I don't have one here to check.
*sarcasm flying over head sound*
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Re: R type 2, quiet sound
Oh, doh is me! Sorry, rushing around like a blue-arsed fly here and the brain is working on low power.
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- thomj
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Re: R type 2, quiet sound
VG descried how to meter the pot earlier in the thread Use a multimeter set to resistance, k ohms
If you can tell me the numbers you get I can buy a pot with the same valuesVectorGlow wrote: Then check the resistance of the pot - turn the boardset off, flip it over and crank the pot all one way - check the resistance. Crank it all the other way - check resistance again. I can't remember off the top of my head what resistance value the pot is - it will be a few K though.
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Re: R type 2, quiet sound
Ah, sadly I currently lack a proper meter to do this with. Sorry...
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- thomj
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Re: R type 2, quiet sound
OK man. I'll find someone else. But you really NEED to get a multimeter. Doesn't need to be fancy. Mine was only £4 or something.
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Re: R type 2, quiet sound
Kernow : I wonder if there is any voltage going across these wires *Sticks wires to tongue, wakes up 2 hours later* Yep that was definately mains voltage.
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