Kenwood KR-5030 receiver problems - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Solid State Talk all about solid state amplification.

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
Thread Tools Search this Thread
Old 13th March 2011, 04:07 PM   #1
diyAudio Member
Join Date: Sep 2009
Default Kenwood KR-5030 receiver problems

Hi, when I turn my KR-5030 on, the relay works (after some seconds, of course) ONLY if the source selector is in its PHONO position. In any other position (AUX, FM Mono, FM stereo and AM) the relay does not work
Again: during the first minutes, every change from the working phono position to any other source implies a de-activation of the relay, and the intervention of the protection. Coming back to Phono, the relay works again

When the receiver is warm, everything works, but if I turn the receiver off I have to restart it with the phono source selected, and only afterwards (even immediately, if it's warm) I can change the source

Which can be the reason of this strange behaviour ?

Thanks so much, Paolo
  Reply With Quote
Old 14th March 2011, 03:29 AM   #2
sregor is offline sregor  United States
diyAudio Member
Join Date: Jan 2006
Location: massachusetts
I'm almost afraid to respond - looked at the manual, and could find nothing remotely connecting the relay protection circuit to the selector switch. About the only thing which is switched besides the signal itself is the indicator lamps. Only guess is that power supply voltages are on the low side, and no phono lamp. Other idea would be something miswired, in which case anything goes. Good luck with it.
  Reply With Quote
Old 14th March 2011, 11:42 AM   #3
jaycee is offline jaycee  United Kingdom
diyAudio Member
Join Date: Apr 2004
Location: Norwich, UK
A quick google shows this unit is from the 70s... in this case, it is almost certainly a symptom of dried up electrolytic capacitors, either in the protection circuit or signal coupling capacitors. You should replace all of them with new ones.
  Reply With Quote
Old 30th April 2011, 09:48 PM   #4
diyAudio Member
Join Date: Apr 2011
Default Kenwood 5030

I bought this unit new and within no time - a couple of months use- the on/off switch became finicky and the panel lights would flicker. You could hear the sound of a bad electical connection. I believe this model has a factory defective switch. Not helping the situation is the fact that you had to click through the phono setting just to here the radio as I recall.This should have had an independent on switch. Anyone care to comment?
  Reply With Quote
Old 1st May 2011, 01:04 AM   #5
sregor is offline sregor  United States
diyAudio Member
Join Date: Jan 2006
Location: massachusetts
It's 30 years old ... They had problems with the switches right away. The correct service action was to replace the AC switch module with a switch module that had two pairs of contacts, and then connect the two pairs in parallel. Many people clean the switch, but this (as you can attest to) doesn't last. There are many threads about this in - the best current fix is to take it apart (not that hard to do) burnish the contacts, and adjust the metal so that there is good tension in the contact. If you could get a hold of a second switch, you could take the set of contacts out, and put it in the module with the first switch. Others have jumped the contacts, and put in separate switch. I would even consider attaching a relay, and controlling the relay with a switch. FWIW, performance-wise IMO this was an very good unit for the money.. As to the selector, when it was sold, very few components were hooked to the aux inputs, and the primary uses were either FM, Phono, or Tape.

Last edited by sregor; 1st May 2011 at 01:06 AM.
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Kenwood DP-5030 not recognising discs Luke Digital Source 4 23rd June 2014 07:24 PM
Blown outputs? Kenwood KR-4200 receiver OSIDEDM Solid State 4 20th January 2011 04:13 PM
Kenwood DP-5030 schematics needed... jean-paul Digital Source 1 23rd November 2009 08:21 PM
Kenwood KR-A3080 GEirin Solid State 3 18th May 2007 10:24 PM
Kenwood KR 4200 oldmarantz Solid State 0 23rd February 2003 01:40 PM

New To Site? Need Help?

All times are GMT. The time now is 09:08 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2