Protection Circuitry; Troubleshooting - Soundstream REFERENCE A 10.0 Owners And Installation Manual

PROTECTION CIRCUITRY

Your REFERENCE Class A amplifier is protected against both overheating and
short circuits by means of the following circuits:
Main power supply fuses
Smart Power Supply Thermal Rollback activating at 85°C.
A fail-safe thermal protection circuit activating at 95°C.
Your amplifier also incorporates an innovative Fault Diagnosis system that
NOTE: If you experience blown main power supply fuses, DO NOT increase
values beyond the original fuse value! Doing so will void your warranty and may
damage your amplifier. If you blow fuses with the REFERENCE Class A
amplifiers, it is likely that the amplifier is seeing a dead short, either in the speaker

TROUBLESHOOTING

PROBLEM
No sound and power LED is
not lit
No sound, a power LED is lit,
and the AIRBASS™ option
has not been added.
Fault LED is lit
Repeatedly blown amp fuse,
frequent activation of Smart
Power Supply Circuit
Not enough input sensitivity
while using Balanced input
Left and Right Input Over-
load indicators lighting
Alternator whine while using
Unbalanced RCA inputs
CAUSE
No power or ground at amp
No remote turn-on signal
Blown fuse near battery
No signal input
The AIRBASS™ switch is in the "IN" posi-
tion. Move it to the "OUT" position
Amp power supply fuse is blown or miss-
ing
Speaker or leads may be shorted
Verify adequate amplifier ventilation
Be sure both Left and Right Input Signal
Switches are set to the "BAL" position
Input signal level is too high - readjust in-
put gains, or select the 0.5-5V input signal
level range
Make sure the Right Input Signal Switch is
in the "UNBAL" position.
Try the Left Input Signal Switch in the
"BAL" and "UNBAL" position: leave the
switch in the quietest position. This will
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not effect the performance of the amplifier.
TABLE OF CONTENTS
Design Features ................................................................. 4 - 5
AIRBASS™ ............................................................................. 5
Reference Class A 5.0 Diagram ......................................... 6 - 7
Reference Class A 10.0 Diagram ....................................... 8 - 9
Selecting Input Modes ........................................................... 10
Balanced / Unbalanced Input ................................................ 11
Wiring & Wiring Diagram ................................................ 12 - 13
Installation and Mounting ...................................................... 14
Level Setting ......................................................................... 15
LSE.Q Theory and Use .................................................. 16 - 17
Protection Circuitry & Troubleshooting .................................. 18
Service .................................................................................. 19
Specifications ........................................................................ 19
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