Kenwood KAC-Q74

mike49504 · 21st April 2011, 06:33 PM

Amp powers up and idles fine. The problem is when a speaker is connected to it The amp will play music for 2 secs the cut off then play for 2 secs and cut off Any ideas?

Perry Babin · 21st April 2011, 06:42 PM

Does it do it if you connect a speaker to one channel at a time?

Does it do it with speakers connected but no RCAs plugged in or with RCAs plugged in but no volume?

mike49504 · 21st April 2011, 07:07 PM

Ok i got the amp to stop doing that by messing with the eq settings.

Now i have output on Both Left and right A channels

Both left and right B channels are dead no output i messed with the switches but still no output out of the B channels

Perry Babin · 21st April 2011, 08:38 PM

Does it have 2 power supplies?

Can you post a photo of the board? I can't find a service manual for it.

21st April 2011, 06:33 PM	#1
mike49504 diyAudio Member Join Date: Sep 2006	Kenwood KAC-Q74 Amp powers up and idles fine. The problem is when a speaker is connected to it The amp will play music for 2 secs the cut off then play for 2 secs and cut off Any ideas?

21st April 2011, 06:42 PM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Does it do it if you connect a speaker to one channel at a time? Does it do it with speakers connected but no RCAs plugged in or with RCAs plugged in but no volume? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

21st April 2011, 08:38 PM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Does it have 2 power supplies? Can you post a photo of the board? I can't find a service manual for it. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

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21st April 2011, 07:07 PM	#3
mike49504 diyAudio Member Join Date: Sep 2006	Ok i got the amp to stop doing that by messing with the eq settings. Now i have output on Both Left and right A channels Both left and right B channels are dead no output i messed with the switches but still no output out of the B channels

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