JBL MS-8 User Manual

Also see for MS-8: User guide Service manual Installing

JBL MS-8 User Manual Manual pdf 42 page image

www.jbl.comTrOUBLeshOOTiNGIf your MS-8 doesn’t seem to be working the way it should, read this section tosee if the problem and possible solution are listed here. If, after you try all of thesolutions listed here, the problem persists, contact JBL Customer Service at516.255.4JBL (4525).POWersOUNdThe power LED does notilluminate.SymptomSymptomPossible CausePossible CauseSolutionSolutionThe power LED illuminates,but the display does notilluminate.There is no sound in allchannels.Improper input connections.Calibration/setup procedurehas not been performed.Incorrect input is selectedon the MS-8The MS-8’s System Volumeis turned all the way down.Set the MS-8 SystemVolume at –20dB. SeeAcoustic Calibration, onpage 32, and Volume Upand Volume Down Buttons,on page 35.Select the correct inputusing the MS-8’s InputSelection menu. See InputSelection Menu, on page 35.Perform the calibration/setup procedure. (Theprocedure must beperformed before the MS-8will pass an audio signalthrough to its outputs.) SeeCalibration/Setup, on page24.Confirm that all the requiredchannels of the source unitare properly connected. SeeAudio Inputs, on page 7.The +12V, Gnd or Rem Interminals are not properlyconnected.The fuse is blown.The display is not properlyconnected.The MS-8’s microprocessorneeds to be reset.Replace the fuse with anidentical 25A fuse.Check the connections atdisplay and at main unit.See Connections: Display,on page 14.Press Reset button with apen or similar object. SeeResetting theMicroprocessor, on page 41.Confirm that all powerconnections are correctlymade according to thismanual. See Connections:Power, on page 5.The head-unit or source-unitvolume control is turned all theway down.Turn the head-unit orsource unit volume up to anormal level.42