Crown Audio Power-Tech 1.1 operation manual Troubleshooting, Condition No power to the amplifier

Power-Tech .1 Series Power Amplifiers

6 Troubleshooting

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.

KeyOff

Lit

Green Lit

Yellow Lit

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.

Operation Manual page 15