JBL SYN 3 - Manual (Page 18)

16
Symptom Probable Cause Solution
No sound coming • Amplifier not turned on • Turn on amplifier
from speaker • Amplifier gain is low • Make sure that there is
• Correct source not amplifier gain for that
selected or turned on channel
• Defective patchcords to • Select proper source
amplifier • Check/replace patch cords
• Speaker wires not • Check speaker wire
connected to amplifier connection to amplifier
Cinema drivers are not • Loose din cables between • Check that din cable is
turning on in cinema mode speakers and power connected between
sequencer speakers and power
• Loose din cables between sequencer
power sequencer and • Check that din cable is
surround processor connected between power
• Defective din cables sequencer and surround
• Relays in speakers not processor
switching • Check/replace din cables
Bass is very weak • Subwoofers are wired out • Make sure that positive
of phase terminals on the
• Subwoofers have not subwoofers go to the
been placed optimally positive terminals on the
amplifiers (red) and do the
same for the negatives
• Experiment with different
locations
Poor or smeared imaging • Poor room acoustics • Use absorptive materials
• Poor program source to minimize early
• Improper polarity reflections
• Check another program
source
• Aim speakers at listening
area, check polarity
Indistinct dialog • Slap echoes • Add absorption or
• Miscalibration of center diffusion materials
channel output level • Check output levels of
surround processor
Uneven surround coverage • Poor speaker placement, • Place surrounds
strong reflections according to THX spec
• Excessive absorption near • Add absorption and/or
surrounds diffusion materials
• Remove absorptive
material to provide
surround reflections
TROUBLESHOOTING