Troubleshooting Tips - DLS DD31T Owner's Manual

Problem
Power LED not ON
Power LED lights BLUE, no output
Power LED lights BLUE, but volume
reduces automatically.
Red Status Protection LED is ON, no
output and
1. Amp is VERY HOT
2. Amp shuts down ONLY when the
vehicle is running
3. Amp has no output
Alternator noise (varies with RPM)
Poor Bass Response
NOTE: After using all the troubleshooting tips above, if the Status L.E.D. is activated and glows RED with no
speakers connected to the amplifier, and all the power connections are correct, this would indicate an
internal problem with the amplifier. Contact DLS Sweden or your local dealer

TROUBLESHOOTING TIPS

With a Volt Ohm Meter (VOM) check
• +24 Volt power terminal (should read +20 to +28V DC
• Remote turn on terminal (should read +12 to +28V DC)
• Ground Terminal
• Check RCA connections
• Test speaker outputs with known good speaker
• Substitute known good Source Unit
• Check for signal on the RCA cable with VOM in AC position.
• Short circuit protection is engaged.Check for speaker
wires shorted to each other or the vehicle chassis.
• Advanced Protection Circuitry is engaging due to high
internal temperature of the amplifier. Amplifer requires
more air flow around the chassis. If this continues
choose a better ventilated mounting location.
• Voltage protection engaged. Voltage to the amp is not
within the 20-28 VDC operating range.
Have the battery/ charging system inspected.
• Possible short circuit. Check speaker wiring. Must
completely turn off amplifier and restart to resume play.
• Check for damaged RCA cable.
• Check routing of RCA cable
• Check Source Unit for good ground
• Check amp gain setting, turn down if set too high
• Check speaker polarity, reverse the connection of one
speaker only.
Solution
:
.