JBL MS-8 Service Manual

TrOUBLeshOOTiNG
sOUNd
Symptom
Possible Cause Solution
There is no sound in one or
more channels.
The sound comes from the
incorrect speaker.
Sound comes from only the
left or right side speakers; or
sound comes from only the
front or rear speakers.
The Balance and/or Fader
controls are set all one way
or another.
Use the MS-8’s System
Levels screen to set the
controls to their center
positions. See Audio
Controls Menu, on page 35.
Incorrect output connection.
Incorrect channel assignment.
Perform the Input
Setup (page 25) and
Output Setup (page 26)
procedures again. (See
the If you make a mistake
sidebar, on page 27.)
Before beginning the
procedures, make sure
to conrm and document
which speakers are
connected to which MS-8
Conrm that the speaker is
connected to the correct
MS-8 speaker output or
to the correct outboard-
amplier channel.
Improper input connection.
Improper output connection.
Improper speaker connection to
outboard amplier.
Outboard amplier channel is
not functioning.
Troubleshoot the outboard
amplier and replace it, if
necessary.
Conrm that the speaker is
properly connected to the
outboard amplier.
Conrm that the speaker
in question is properly
connected to the MS-8’s
speaker output. See Audio
Outputs, on page 10.
If the speaker is connected
to an outboard amplier,
conrm that the outboard-
amplier channel is properly
connected to the MS-8. See
Audio Outputs, on page 10.
Conrm that all required
channels of the source unit
are properly connected. See
Audio Inputs, on page 7.
43
TROUBLESHOOTING
MS-8
18

JBL MS-8 Specifications

General

Amplifier class	-
Frequency range	20 - 20000 Hz
Audio output channels	5.1 channels
Peak power per channel	30 W
Signal-to-Noise Ratio (SNR)	85 dB
Total Harmonic Distortion (THD)	- %
RMS power output per channel (4 Ohm)	18 W
DC-in jack	Yes
Purpose	Car
Product color	Black, White
Connectivity technology	Wired
Built-in display	No