kenwood kac9104 cutting out

ian33 · 25th October 2011, 01:55 AM

This amp plays good audio at low volume.when i turn up thegain and bass bost the audio cuts in and out.It act like the amp is losing power.It has 32.1mv on the speaker terminals with no signal.I try two other speakers but no change.any idea what could be the problem?

Perry Babin · 25th October 2011, 02:27 AM

Is the voltage (measured directly) across the B+ and ground terminals dropping?

If so, how far does the voltage drop?

ian33 · 1st November 2011, 12:41 AM

The voltage was drouping to 10v .I solder the output and power supply section and it seem to be ok now.

Perry Babin · 1st November 2011, 09:14 AM

Are any of the output transistors leaking or shorted?

25th October 2011, 01:55 AM	#1
ian33 diyAudio Member Join Date: Jun 2010 Location: the caribbean	kenwood kac9104 cutting out This amp plays good audio at low volume.when i turn up thegain and bass bost the audio cuts in and out.It act like the amp is losing power.It has 32.1mv on the speaker terminals with no signal.I try two other speakers but no change.any idea what could be the problem?

25th October 2011, 02:27 AM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Is the voltage (measured directly) across the B+ and ground terminals dropping? If so, how far does the voltage drop? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

1st November 2011, 09:14 AM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Are any of the output transistors leaking or shorted? __________________ 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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1st November 2011, 12:41 AM	#3
ian33 diyAudio Member Join Date: Jun 2010 Location: the caribbean	The voltage was drouping to 10v .I solder the output and power supply section and it seem to be ok now.

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