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TROUBLE SHOOTING GUIDE
A.No power
1
.
Check all the ground, B+ and remote terminals for tight connection.
2
.
Check all fuses.
3
.
Use a Volt/Ohm meter to check all power wire connected to see if the system is receiving
+12 V.
B. "Motorboating" : The mobile electronic crossover power indicator going off repeatedly
when the audio system is on.
1
.
Check if the mobile electronic crossover B+ power input is connected
directly to the +12V power source.
2
.
Check the battery voltage: if low, recharge or replace it.
3
.
Check if the mobile electronic crossover has a good ground connection (i.e. Whether the
ground wire is making good contact with a bare metal spot of the vehicle chassis).
C
.
The mobile electronic crossover heats
up quickly even when the audio system is at
moderate volume.
1
.
Check all ground connections of the entire system for good contact with bare metal
2
.
Check for speaker short: Disconnect speaker wire from amplifier, test speaker and
wire with a Volt/Ohm meter. if there is speaker and meter contact, sightly enlarge
the speaker mounting holes, if there is a short in the speaker wiring, replace the
entire speaker wire or re-insulate any exposed wire with electrical tape.
D.When the engines is running, the audio system has a whining noise that remains
unchanged or disappears with the increase of audio volume.
1.Check all the power wires to see if they are all connected directly to the battery.
2.Check all the ground connections of the entire system for good contact with bare metal of
the vehicle chassis.
3.Check if the source unit and the mobile electronic crossover are ground at the same
reference point.
E.When the engine is running, the audio system has a whining noise that increases or
decreases with the volume of all program sources (whether radio, tape or CD).
1.Install a 10 amp in-line filter on the red power wire of the mobile electronic crossover.
2.If the whining noise persists, check the alternator diodes and the voltage regulator.
F. When the engine is running. The audio system has a whining noise that increases or
decreases with the tape mode volume ONLY.
1.This is commonly known as "radiated" noise. It is NOT caused by the mobile electronic
crossover and thus is beyond the scope of this manual. Please contact your local
retailer / installer for assistance.
G.Obvious distortion at low volume.
1.Output level of various channels not compatible, refer to section titled
FINAL SYSTEM CHECK.
H
.
Over all sound effect good, but bass
abnormal (more bass at the two extreme settings
of the balance control than at the center setting).
1.The subwoofers are "out-of-phass" with each other, thus canceling the bass when
the balance control is at the center position. Check the wiring from the amplifier to the
subwoofers (positive "+" and negative "-" to negative "-" ).
A. Pre-Setting
1.Preset front, rear and subwoofer amplifier input gain to half of their maximum.
2.Preset the crossover frequencies and output Levels as follows.
Bi-Amp System
Front Frequency Selector: 160Hz
Frequency Multiplier: X 1
Rear Frequency Selector: 160Hz
Subwoofer Frequency Selector: 160Hz
Front Output Level: 10 o' clock position
Rear Output Level: 10 o' clock position
Subwoofer Output Level: 12 o' clock position
Tri-Amp System
Front Frequency Selector: 200Hz
Frequency Multiplier: X 20
Rear Frequency Selector: 120Hz
Subwoofer Frequency Selector: 120Hz
Front Output Level: 10 o' clock position
Rear Output Level: 10 o' clock position
Subwoofer Output Level: 12 o' clock position
3
.
Preset the volume of the source unite to its
minimum (otherwise, when the source
unit is turned on, the sudden surge of high power from
the amplifier might cause
damage to the audio components).
B. Turn the source unit on and slowly turn the volume up:
No Sound At All
1.Turn the system off immediately.
2.Check if connections are made properly (refer to subsection titled
CONNECTION for details).
3.Use a Volt /Ohm meter to make sure good chassis ground established for each
Component that needs to be grounded.
4.Check if the power input of all system components are properly connected to
12 volt positive power Supply.
5.Check if the remote on/off terminal of all system components are properly
connected to positive 12 volt source.
6 If everything is order, turn the power on again, If the problem persists, refer to
.
section titled TROUBLE SHOOTING GUIDE for assistance.
Obvious Distortion
Turn the system off and refer to section titled TROUBLE SHOOTING GUIDE for assistance.
Out-of-Phase Problem (i.e. Abnormal Bass)
Turn the system off and refer to section titled TROUBLE SHOOTING GUIDE for assistance.
C
.
NOISE CHECK
Before mounting the mobile electronic crossover and other audio components
permanently, conduct the following check:
1.Start the engine and turn on power of the source unit.
2.Rev the engine and vary the audio volume to check for radiated engine noise. If there
is an alternator whining noise or tic-tic noise, refer to the TROUBLE SHOOTING GUIDE
for assistance. If the problem persists, consult your local dealer directly.
3.If no unwanted noise is detected, double check all the wiring and cables for safe
placement. Then securely tighten the mounting screws of all the audio components.
FINAL SYSTEM CHECK
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65-C1131-MA
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