Crown Audio 133472-1A Bad Sound, 2.4Amp Overheating, Troubleshooting, Amplifier Application Guide

26 Chapter 2: Troubleshooting

2.3 Bad Sound
		Are ODEP
		indicators (if	Yes
Bad Sound		equipped) dim or
		off?
		No
Is source signal	No	Check levels and/or
clean and		indicators at source
undistorted?		level for clipping.
		Are the IOC or
		Clip indicators (if	Yes
		equipped)
Yes		flashing or on?

Amp overheating.

See "Amp

Overheating"

flowchart.

Check amp for clipping.

Figure 2.4

Bad Sound

Possible Causes

Is there a			See "Hum and			No
Hum or Buzz		Yes	Buzz" in
sound?			Section 1.2.2.
				Are input and
				output			No
	No			connections o.k.?
			Yes
				Refer amp to
				service center.

	System Gain	Amp not adequately
	Structure. See	cooled. See "Amp
	"Setting System	Overheating"
	Gain Structure in	flowchart.
	Section 1.6.
Secure input and
output connections.

2.4Amp Overheating

Amp

Overheating

Are the filters		Clean or replace
(if equipped)	Yes
		filters.
clogged?

No

Is the amp			See "Rack Cooling" in
			Section 1.1, and info
getting enough		No
			on amp cooling in
cool air?
			Operation Manual.
	Yes

Figure 2.5

Amp Overheating

Is the amp

operating within

Lower impedances cause amps to dissipate more

its rated

Yes

heat. See "Amplifier Load

impedance?

No

Refer amp to

service center.

Impedance" in Section 1.3.2.

Amplifier Application Guide