mulletchuck
Well-known member
check your wiring for the meter cables. they're probably backwards. Does the meter LED light up?
SB4001 Support / Build Thread
- Thread starter ruckus328
- Start date
Help Support GroupDIY Audio Forum:
SKJGProject
Well-known member
yes...but i'm 100% sure that the "+" of the meter goes to "+" on the pcb :-\
mulletchuck
Well-known member
you could always touch the leads of the meter to like a AA battery or somethin' real quick and see if the needle jumps.
SKJGProject
Well-known member
weird....tried it again today and now the meter is working ;D
calibrated and running, really liking it so far!
calibrated and running, really liking it so far!
SKJGProject
Well-known member
ok really weird....when comp is in bypass for a while and put in line again then sometimes the meter needle needs up to 5 minutes to start reacting again....by level matching and looking at the makeup gain it seems to show the right GR but maybe there is something wrong i should look for????
SKJGProject
Well-known member
no help? seems that my meter is broken..checked the current, there is no overload, unit works calibrated like a charm, but no needle movement at all 
anybody knows how to fix this particular meter? or where can i order a replacement?
anybody knows how to fix this particular meter? or where can i order a replacement?
mulletchuck
Well-known member
you should email mike directly. he could give you a part number.
SKJGProject
Well-known member
*bump* still having that weird meter issue, but it is definitely somewhere in the meter circuit
any idea where to look first?
any idea where to look first?
I just noticed that Left and Right of my SB4001 is 5db out. It seems the to be the unit and not the rack, as this issue only occurs once I put Comp In on. Could this still be a rack issue, even if it only occurs when the comp is on? I did buy this new rack used.
Do I need to do this in the calibration to fix this issue:
Unity Gain (VR1L/R) - Toggle between bypass and comp in. Adjust VR1L/R for unity gain (ie - same levels when the compressor is engaged as it is when it is in bypass)
It's been a while since I worked on this project, so I cannot recall if I need to dismantle the unit to access the Left and Right trimpots? Is this necessary?
Could this issue be more than the trimpots adjustments, as I rarely used this unit. Could something else be causing this issue?
Also, if I just turn the trimpots, my concern is I am overturning it and the problem of the voltage drop on one side could be elsewhere.
Any tips regarding troubleshooting this issue and confirming it is just a trimpot adjustment?
Thank you.
Do I need to do this in the calibration to fix this issue:
Unity Gain (VR1L/R) - Toggle between bypass and comp in. Adjust VR1L/R for unity gain (ie - same levels when the compressor is engaged as it is when it is in bypass)
It's been a while since I worked on this project, so I cannot recall if I need to dismantle the unit to access the Left and Right trimpots? Is this necessary?
Could this issue be more than the trimpots adjustments, as I rarely used this unit. Could something else be causing this issue?
Also, if I just turn the trimpots, my concern is I am overturning it and the problem of the voltage drop on one side could be elsewhere.
Any tips regarding troubleshooting this issue and confirming it is just a trimpot adjustment?
Thank you.
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