Testing; Troubleshooting; Corrective Action; Reconnect Battery - Phase Linear UPA224 Manual Del Usario

UPA224/UPA424
TESTING/TROUBLESHOOTING
Before finishing the installation, perform the
following tests to make sure the wiring is correct
and everything is operating properly.

Reconnect Battery

When wiring is complete, reconnect the battery
negative terminal.

Test Power Wiring

Turn on the receiver, but do not turn up the
volume. The amplifier power light should come
on. If not, check the REM and +12V wires. Turn
up the receiver volume slightly. All speakers
should operate. If not, check wiring connections
at amplifier and speakers.

Test Speaker Connections

These tests make sure the speakers are
connected properly. If speakers don't play at all,
one (or both) speaker wires may be
disconnected.
.
Problem Possible Cause
Amplifier does not No power to +12V terminal
turn on
No power to REM terminal
Blown main fuse at battery
Blown fuse at amplifier
Faulty ground
Volume control too Input level control adjusted too
sensitive high
Distorted sound Input level control adjusted too
high
Blows fuse(s) at Power wires connected backwards
amp
Internal problem with amp
Engine noise / Ground loop(s)
Alternator whine
Faulty ground at amp
Faulty ground at head unit
Inductive coupling
Input level on amp set too high
Poor bass response Speakers out of phase
7

Troubleshooting

Corrective Action

Check fuse(s)
Check head unit fuse(s) and wiring
Replace fuse and identify cause of failure
Replace fuse and identify cause of failure
Reground main power ground to bare metal chassis
Readjust the input level
Readjust the input level
Reconnect power wires properly
Take unit for service
Use good quality shielded RCA cables
Reground amp to clean bare metal chassis
Reground head unit to clean bare metal chassis
Reroute RCA and/or speaker wires away from factory
harnesses
Readjust input level
Check speaker polarity; reverse the connection to one
speaker only if two subwoofers are connected to the
amplifier.