Kenwood KR-9600 troubleshooting question

Randy Knutson · 15th November 2004, 02:45 AM

Hi,

I have an old Kenwood KR-9600 given to me by my father. When everything is connected the unit sounds like a bowl of rice crispies: It constantly snaps crackles and pops.

I would like to open it up and troubleshoot however I am unsure of what I should be looking for...

Any Ideas?

Thanks In Advance,
Randy

Bill Fitzpatrick · 15th November 2004, 06:09 AM

You need to provide more info.

Is the noise on both channels when in stereo mode?
Is the noise there when the volume control is at min.?

A unit that old could easily use new electrolytics.

EchoWars · 15th November 2004, 06:16 AM

Take the preamp to amplifier jumpers out of the back and see if the noise stops (ummm... power off before you take the jumpers out). If it does, then the source is obviously in the preamp (which would be a bummer, since the amp is pretty simple, and the preamp is fairly complex).

Also, a thorough cleaning with DeOxit would be a good idea, but this does require considerable disassembly to accomplish.

Randy Knutson · 15th November 2004, 06:42 AM

EchoWars,

Your idea worked! I disconnected the preamp from the power amplifier and inserted a source between the two. The crackle has dissapeared... At least I can use the darn thing. It would be nice if I could get the preamp working any advice ?

Thanks,
Randy

EchoWars · 15th November 2004, 09:32 AM

If you're good mechanically, get some Caig DeOxit and start cleaning switches and pots. No substitutes.

15th November 2004, 02:45 AM	#1
Randy Knutson diyAudio Member Join Date: Mar 2003 Location: Willmar, Minnesota	Kenwood KR-9600 troubleshooting question Hi, I have an old Kenwood KR-9600 given to me by my father. When everything is connected the unit sounds like a bowl of rice crispies: It constantly snaps crackles and pops. I would like to open it up and troubleshoot however I am unsure of what I should be looking for... Any Ideas? Thanks In Advance, Randy

15th November 2004, 06:42 AM	#4
Randy Knutson diyAudio Member Join Date: Mar 2003 Location: Willmar, Minnesota	the noise is gone! EchoWars, Your idea worked! I disconnected the preamp from the power amplifier and inserted a source between the two. The crackle has dissapeared... At least I can use the darn thing. It would be nice if I could get the preamp working any advice ? Thanks, Randy

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15th November 2004, 06:09 AM	#2
Bill Fitzpatrick diyAudio Member Join Date: Jun 2001 Location: Eugene, OR	You need to provide more info. Is the noise on both channels when in stereo mode? Is the noise there when the volume control is at min.? A unit that old could easily use new electrolytics.

15th November 2004, 06:16 AM	#3
EchoWars diyAudio Member Join Date: Dec 2002 Location: Left of the Dial	Take the preamp to amplifier jumpers out of the back and see if the noise stops (ummm... power off before you take the jumpers out). If it does, then the source is obviously in the preamp (which would be a bummer, since the amp is pretty simple, and the preamp is fairly complex). Also, a thorough cleaning with DeOxit would be a good idea, but this does require considerable disassembly to accomplish.

15th November 2004, 09:32 AM	#5
EchoWars diyAudio Member Join Date: Dec 2002 Location: Left of the Dial	If you're good mechanically, get some Caig DeOxit and start cleaning switches and pots. No substitutes.

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