Soundstream Technologies Class A 10.0 Protection Circuitry, Troubleshooting, Table Of Contents

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	CAUSE
No sound and power LED is	∙ No power or ground at amp
not lit	∙ No remote turn-on signal
	∙ Blown fuse near battery
No sound, a power LED is lit,	∙ No signal input
and the AIRBASS™ option	∙ The AIRBASS™ switch is in the "IN" posi-
has not been added.
	tion. Move it to the "OUT" position
Fault LED is lit	∙ Amp power supply fuse is blown or miss-
	ing
Repeatedly blown amp fuse,	∙ Speaker or leads may be shorted
frequent activation of Smart	∙ Verify adequate amplifier ventilation
Power Supply Circuit
Not enough input sensitivity	∙ Be sure both Left and Right Input Signal
while using Balanced input	Switches are set to the "BAL" position
Left and Right Input Over-	∙ Input signal level is too high - readjust in-
load indicators lighting	put gains, or select the 0.5-5V input signal
	level range
Alternator whine while using	∙ Make sure the Right Input Signal Switch is
Unbalanced RCA inputs	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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