Protection Circuitry & Troubleshooting; Troubleshooting - Soundstream Reference 705s Owner's Manual And Installation Manual

Your Reference705s is protected against both overheating and short circuits by means of the following
circuits:
Main power supply fuses (Maxi-fuse at 40 amps)
Smart Power Supply Thermal Rollback activating at 85°C.
A fail-safe thermal protection circuit activating at 95°C.
Self-resetting circuit breakers on channels 1,2,3 & 4 to protect against short circuits.
Your amplifier also incorporates an innovative Fault Diagnosis system that identifies a blown power
supply fuse.
NOTE: If you experience blown main power supply fuse, DO NOT increase value beyond the 40 amp
maxi-fuse! Doing so will void your warranty and may damage your amplifier.
No sound and LED's are not lit
Fault LED is lit
Repeatedly blown amp fuse, frequent activa-
tion of Smart Power Supply Circuit
no sound from channels 3 & 4 with 2 chan-
nels of input
Channel 1, 2, 3 or 4 experience intermittent
output
PROTECTION CIRCUITRY

TROUBLESHOOTING

PROBLEM
no power or ground at amp
no remote turn-on signal
blown fuse near battery
amp power supply fuse is blown or missing
check speaker configuration, amp may be in
"High Power" mode, put amp into "High Current"
mode if subwoofer load is less than 1 ohm (see
p.8, "Setting High Power/High Current Switch")
speaker or leads may be shorted
verify adequate amplifier ventilation
check input settings on bottom of amplifier—
switch should be set to inputs "1 & 2"
circuit breakers on these channels are activat-
ing. Check for a possible short in the speaker
wire or in the speaker itself
Verify the impedance of the load is at or above
the rated minimum impedance for these chan-
nels
22
CAUSE