18
PROTECTION CIRCUITRY
Your REFERENCE Class A PICASSO 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 identifies a blown power
supply fuse.
NOTE: If you experience blown main power supply fuse, DO NOT increase value beyond the 30 Amp
fuse! Doing so will void your warranty and may damage your amplifier.
TROUBLESHOOTING
PROBLEM CAUSE
No sound and power LEDs
are not lit •no power or ground at amp
•no remote turn-on signal
•blown fuse near battery
Fault LED is lit •amp power supply fuse is blown or missing
Repeatedly blown amp fuse,
frequent activation of Smart •speaker or leads may be shorted
•verify adequate amplifier ventilation
No output from channels 3 &
4 with 1 pair of RCA inputs •Select "Internal from ch's 1 & 2" on Ch 3 & 4 input on the bottom of
the amplifier. (see page 15)
Not enough input sensitivity
while using Balanced input •Be sure both Left and Right Input Signal Switches are set to the
"BAL" position
Left and Right Input Overload
indicators lighting •Input signal level is too high - readjust input gains, or select the 0.5-
5V input signal level range
Alternator whine while using
Unbalanced RCA inputs •Make sure the channel 2 Input Signal Switch is in the "UNBAL" posi-
tion.
•Try the Input Signal Switches for channels 1,3 & 4 in the "BAL" posi-
tion: leave the switches in the quietest position. This will not effect