Crown Audio Troubleshooting, Macro-Tech MA-3600VZ Power Amplifier, page, Possible Reason

Macro-Tech MA-3600VZ Power Amplifier

7 Troubleshooting	CONDITION: No power to the amplifier.
	POSSIBLE REASON:
CONDITION: Normal operation.
POSSIBLE REASON:	•	The amplifier's Power switch is off.
	•	The amplifier is not plugged into the power
• This is normal operation for your amp.		receptacle.
	•	The amplifier's low-voltage power supply
		fuse has blown. Return amp to Crown or an
		authorized Crown Service Center for
		servicing.

• The amp is set for Parallel Mono mode.

	CONDITION: No sound.
	POSSIBLE REASON:
CONDITION: Distorted sound.	•	The amplifier has just been turned on and
		is still in the 4-second turn-on delay.
POSSIBLE REASON:
	•	The amplifier is being held in Standby
		Mode by an installed IQ PIP module.

•Input signal level is too high. Turn down

		your amplifier level controls. NOTE: Your	•	ODEP limiting has been activated. Take
		amplifier should never be operated at a		appropriate measures to keep the ampifier
		level which causes the Signal/IOC LEDs
				out of ODEP limiting (see Section 5.1.1
		to constantly indicate an IOC condition.
				for more information about ODEP).
	•	ODEP limiting has been activated. Take	•	The amplifier is in drive protection mode.
		appropriate measures to keep the ampli-
				This can occur with improper source sig-
		fier out of ODEP limiting (see Section
				nals like infrasonic square waves or input
		5.1.1 for more information about ODEP).
				overloads that excessively clip the input
				signal.
			•	The amplifier's circuit breakers have
Key				tripped. Reset circuit breakers. If the trip
				again, return amp to Crown or an autho-
				rized Crown Service Center for servicing.
			•	No input signal
			•	Input signal level is very low.
			•	Level controls are turned down.

page 20 Operation Manual