Crown Audio Power-Tech 1.1 - Manual (Page 15)

Power-Tech .1 Series Power Amplifiers
page 15 Operation Manual
CONDITION: No power to the
amplifier.
POSSIBLE REASON:
• The amplifier's Power switch is off.
• The amplifier is not plugged into the power
receptacle.
• The amplifier's low-voltage power supply fuse
has blown. Return amp to Crown or an autho-
rized Crown Service Center for servicing.
CONDITION: Distorted sound.
POSSIBLE REASON:
• Input signal level is too high. Turn down your
amplifier level controls. NOTE: Your amplifier
should never be operated at a level which
causes the IOC LEDs to flash yellow con-
stantly.
CONDITION: No sound.
POSSIBLE REASON:
• The amplifier has just been turned on and is
still in the 4-second turn-on delay.
• The amplifier is in drive protection mode. This
can occur with improper source signals like
infrasonic square waves or input overloads
that excessively clip the input signal.
• The breaker has tripped. First disconnect your
speakers from the affected channel(s) one by
one to determine if one of the loads is shorted.
Reset the breaker and apply an input signal. If
the signal presence indicator flashes, then try a
different speaker or cable to determine where
the short is occurring. If no short can be found,
turn off the amp and allow the amp to cool. If
indicators do not return to normal after restart-
ing your amp, return amp to Crown or an
authorized Crown Service Center for servicing.
• Input signal level is very low.
• Level controls are turned down.
• Input cables are not connected.
Key Off
Lit
Green Lit
Yellow Lit
6 Troubleshooting