Mackie SP260 - Service and Troubleshooting; No Power and Noise Troubleshooting; No Sound and Imbalanced Level Diagnosis

SP260 2x6 Speaker Processor
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SP260 2x6 Speaker Processor
If you think your Mackie product has a problem,
please check out the following troubleshooting tips and
DOYOURBESTTOCONlRMTHEPROBLEM6ISITTHE3UPPORT
section of our website (www.mackie.com) to get some
ideas or contact our technical support heroes. You may
find the answer to the problem without having to send
your Mackie product away.
Troubleshooting
No Power
s /URFAVORITEQUESTION)SITPLUGGEDIN
s -AKESURETHEPOWERCORDISSECURELYSEATEDIN
  THE)%#SOCKETANDPLUGGEDALLTHEWAYINTOTHE
  !#OUTLET
s )SANYTHINGONTHEFRONTPANELILLUMINATED)FNOT
  MAKESURETHE!#OUTLETISLIVE;CHECKWITHA
tester or lamp].
s -AKESURETHEREARPANELPOWERSWITCHISINTHE
ON position.
s !REALLTHELIGHTSOUTINTOWN)FSOCONTACTTHE
local power company to get power restored.
s )STHEFUSEBLOWN3EEINSTRUCTIONSTOTHERIGHTFOR
removing and replacing it.
s )FNOTHINGISILLUMINATEDANDYOUARECERTAINTHAT
  THE!#OUTLETISLIVEANDTHEFUSEISNOTBLOWN
it will be necessary to have the SP260 serviced.
There are no user serviceable parts.
  2EFERTOh2EPAIRvONTHENEXTPAGETOlNDOUTHOW
to proceed.
Noise / Hum
s 4RYCHANGINGTHEPOSITIONOFTHEMAINGROUNDLIFT
switch [3] on the rear panel of the SP260.
s #HECKTHESIGNALCABLESBETWEENTHEMIXER
and the processor and the processor, amps and
loudspeakers. Disconnect them one-by-one. If
the noise goes away, you will know which input
or output is causing the problem.
s 3OMETIMESITHELPSTOPLUGALLTHEAUDIO
  EQUIPMENTINTOTHESAME!#CIRCUITSOTHEYSHARE
a common ground. Make it so.
Appendix A: Service Information
To remove and replace the fuse:
 $ISCONNECTTHEPOWERCORDFROMTHE)%#SOCKET.
2. Remove the fuse drawer by prying it open with a
small screwdriver. It will slide all the way out.
3. Remove the fuse and replace it with an
EQUIVALENTTYPEFUSE
 4M!,6
4. Replace the fuse drawer by pushing it all the way
BACKINTOTHE)%#SOCKET
If two fuses blow in a row, then something is very
wrong. Try a different outlet in a totally different
LOCATION)FFUSESCONTINUETOBLOWSEETHEh2EPAIRv
section on the next page to find out what to do.
No Sound
s !RETHELEVELCONTROLSONTHEMIXERORAMPLIlER
turned all the way down? Follow the procedures
  INh'ETTING3TARTEDvSECTIONONPAGETOVERIFY
that all of the volume controls in the system are
properly adjusted.
s )STHESIGNALSOURCEWORKINGANDMAKINGUNION
scale)?
s !REALLTHECONNECTIONSGOODANDSOUND-AKE
sure all of the connecting cables are in good
repair and securely connected at both ends.
FUSE