Crown Audio 133472-1A manual No Sound, Troubleshooting, Amplifier Application Guide

Chapter 2: Troubleshooting 25

Figure 2.3

No Sound

2.2 No Sound

No Sound

Is Power or		Check AC Power to
Enable	No	amp. See "No Power"
indicator on?		flowchart.

Yes
Are signal			Check signal source	Does amp have		Check settings on
indicators	No			IQ PIP model	Yes
			for adequate output.			IQ PIP module.
blinking?				installed?
Yes				No
Are the level	No	Turn up level controls		Are speakers'
controls
			until you hear output.	protection
turned up?						Repair or reset
				systems tripped,	Yes
						speaker.
				or speakers
				damaged?
Yes
				No
Are speakers	No	Connect Speakers
connected?			to Amp.
				Does amp have
				Fault, TLC or
				ODEP
Yes				indicators?
Is there a			Fault or TLC	ODEP		Neither Fault,
						TLC or ODEP
short-circuit on		Yes	Remove the
the speaker			short-circuit.
line?
			Is indicator	Is indicator	Yes
No				off?
			on?
			Yes	No
					Amp overheated or in
					other standby condition.
			No		See "Amp Overheating"
					flowchart and/or refer to
					Operation Manual.
			Refer amp to
			service center.

Amplifier Application Guide