Kenwood Amplifier KA 7020 Starting up Issues!

emsee · 8th November 2007, 09:10 PM

Hi all Im new

I was wondering if anyone could help me with my problem well here it goes:

Ok I own a Kenwood KA - 7020 stereo integrated amplifier, which I have had for sometime which I use to play music from my PC, I have it connected to the pc with a stereo jack to phono wire. I have the phono wires in the cd input and the stereo jack in the sound card at the back of the pc. It has been working well for a long timel, but recently its giving me a problem which is; when I switched it on, it doesnt give any sound out through the speakers at all!
I have to keep switching it on and off so many times after switching it on and off laround 20 to 30 times it starts working!

Does anyone know whats going on? Whats causing this problem? Any help will be appriciated

Thanks!

emsee · 9th November 2007, 07:53 PM

help please

EchoWars · 13th November 2007, 05:50 AM

This belongs in Solid-State, not here, but...

Does the Kenwood use a speaker relay? If so, you may be used to hearing a gentle 'click' a few seconds after power-up when it was working OK. A common problem is dried out capacitors or a weak relay driver transistor in the protection circuit.

emsee · 14th November 2007, 09:49 PM

Yes I do hear a click as soon as i press the power switch, but i still dont hear no sound from the speakers, i no its not the speakers becuase I have tired other speakers on this amplifier.

How do I check for out capacitors or relay driver transistors?

jaycee · 15th November 2007, 02:45 AM

Just a thought - do you have any problems when the computer isnt connected to it? try some other source like a walkman or ipod or something.

emsee · 18th November 2007, 04:36 PM

Thank You for your reply, yes thats what i though could have been the problem when this first occured, however i did try other sources but the same problem occurs

jaycee · 18th November 2007, 06:10 PM

Well... either the amp has too much DC offset and needs to be adjusted, or the DC protection circuit has gone faulty... probably the latter.

emsee · 31st May 2008, 04:52 PM

Quote:

With a service manual or at least a schematic we would probably be able to offer more help.

/Hugo

I dont quite understamd what you mean?

Mooly · 31st May 2008, 04:56 PM

Hi, How did Netlist find this old thread--- Magic

Whats the relay you can hear click after a couple of seconds ? If the speakers are connecting to the amp if you put your ear to the tweeter you should be able to tell if the amps are at least connected- any hiss ? I would have thought a DC offset would hold the relay off-- no click.

nigelwright7557 · 31st May 2008, 08:57 PM

Quote:

Originally posted by Mooly
Hi, How did Netlist find this old thread--- Magic
Whats the relay you can hear click after a couple of seconds ? If the speakers are connecting to the amp if you put your ear to the tweeter you should be able to tell if the amps are at least connected- any hiss ? I would have thought a DC offset would hold the relay off-- no click.

Could be a faulty relay ?

8th November 2007, 09:10 PM	#1
emsee diyAudio Member Join Date: Nov 2007	Kenwood Amplifier KA 7020 Starting up Issues! Hi all Im new I was wondering if anyone could help me with my problem well here it goes: Ok I own a Kenwood KA - 7020 stereo integrated amplifier, which I have had for sometime which I use to play music from my PC, I have it connected to the pc with a stereo jack to phono wire. I have the phono wires in the cd input and the stereo jack in the sound card at the back of the pc. It has been working well for a long timel, but recently its giving me a problem which is; when I switched it on, it doesnt give any sound out through the speakers at all! I have to keep switching it on and off so many times after switching it on and off laround 20 to 30 times it starts working! Does anyone know whats going on? Whats causing this problem? Any help will be appriciated Thanks!

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Kenwood KAC-X811D Current issues	shawnschuldt	Car Audio	5	23rd September 2008 02:17 PM
kenwood cd player usb jump drive issues	ppia600	Car Audio	24	30th December 2007 11:53 AM
Kenwood DP-X9010 Transport issues	D.A.R.R.Y.L.	Digital Source	15	21st November 2007 10:12 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

9th November 2007, 07:53 PM	#2
emsee diyAudio Member Join Date: Nov 2007	help please

13th November 2007, 05:50 AM	#3
EchoWars diyAudio Member Join Date: Dec 2002 Location: Left of the Dial	This belongs in Solid-State, not here, but... Does the Kenwood use a speaker relay? If so, you may be used to hearing a gentle 'click' a few seconds after power-up when it was working OK. A common problem is dried out capacitors or a weak relay driver transistor in the protection circuit.

14th November 2007, 09:49 PM	#4
emsee diyAudio Member Join Date: Nov 2007	Yes I do hear a click as soon as i press the power switch, but i still dont hear no sound from the speakers, i no its not the speakers becuase I have tired other speakers on this amplifier. How do I check for out capacitors or relay driver transistors?

15th November 2007, 02:45 AM	#5
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	Just a thought - do you have any problems when the computer isnt connected to it? try some other source like a walkman or ipod or something.

18th November 2007, 04:36 PM	#6
emsee diyAudio Member Join Date: Nov 2007	Thank You for your reply, yes thats what i though could have been the problem when this first occured, however i did try other sources but the same problem occurs

18th November 2007, 06:10 PM	#7
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	Well... either the amp has too much DC offset and needs to be adjusted, or the DC protection circuit has gone faulty... probably the latter.

31st May 2008, 04:56 PM	#9
Mooly diyAudio Member Join Date: Sep 2007	Hi, How did Netlist find this old thread--- Magic Whats the relay you can hear click after a couple of seconds ? If the speakers are connecting to the amp if you put your ear to the tweeter you should be able to tell if the amps are at least connected- any hiss ? I would have thought a DC offset would hold the relay off-- no click.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)