R5000 No Power - UK Vintage Radio Repair and Restoration Discussion Forum

littlejohn · 3rd Jul 2016, 12:42 am

Hi
My Kenwood R5000 recently stopped working and I suspect it may be the Power Supply Board (it is totally Dead). I wondered if anyone could help or advise?. (It was on 230v at the time)

Regards John G1LCC

g4aaw pete · 3rd Jul 2016, 12:05 pm

Hello John

time to get the test meter out, I think.
Do you have the service manual?

http://www.iw2nmx.it/Kenwood%20-%20T...e%20Manual.pdf

I've only had mine a few weeks, but not had that particular fault.

Regards
Pete

HamishBoxer · 3rd Jul 2016, 12:53 pm

If it is totally dead check the thermal fuse if fitted on the mains transformer that or its self could be open. Check even the mains switch also power supply caps for high ESR.

Not forgetting but unlikely dry joints on the panel. Start at the mains input and carefully work through.

Station X · 3rd Jul 2016, 1:08 pm

The first thing to do is unplug the set, switch it on and measure the resistance between the live and neutral pins of the mains plug. That will tell you whether the primary circuit is intact.

littlejohn · 3rd Jul 2016, 10:03 pm

Hi Guys
Thanks for the pointers, I will set to and do some testing. I have done the initial fuse checks and they were OK.
Thanks Again. I will keep you Posted

John G1LCC
PS. I have a copy of the Manual.

3rd Jul 2016, 12:42 am	#1
littlejohn Retired Dormant Member Join Date: Jun 2016 Location: Cheshire, UK. Posts: 2	R5000 No Power Hi My Kenwood R5000 recently stopped working and I suspect it may be the Power Supply Board (it is totally Dead). I wondered if anyone could help or advise?. (It was on 230v at the time) Regards John G1LCC

3rd Jul 2016, 12:05 pm	#2
g4aaw pete Heptode Join Date: Jan 2008 Location: Birchington Kent, UK. Posts: 596	Re: R5000 No Power Hello John time to get the test meter out, I think. Do you have the service manual? http://www.iw2nmx.it/Kenwood%20-%20T...e%20Manual.pdf I've only had mine a few weeks, but not had that particular fault. Regards Pete

3rd Jul 2016, 12:53 pm	#3
HamishBoxer Dekatron Join Date: Aug 2007 Location: W.Butterwick, near Doncaster UK. Posts: 8,932	Re: R5000 No Power If it is totally dead check the thermal fuse if fitted on the mains transformer that or its self could be open. Check even the mains switch also power supply caps for high ESR. Not forgetting but unlikely dry joints on the panel. Start at the mains input and carefully work through. __________________ G8JET BVWS Archivist and Member V.M.A.R.S

3rd Jul 2016, 1:08 pm	#4
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,288	Re: R5000 No Power The first thing to do is unplug the set, switch it on and measure the resistance between the live and neutral pins of the mains plug. That will tell you whether the primary circuit is intact. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

3rd Jul 2016, 10:03 pm	#5
littlejohn Retired Dormant Member Join Date: Jun 2016 Location: Cheshire, UK. Posts: 2	Re: R5000 No Power Hi Guys Thanks for the pointers, I will set to and do some testing. I have done the initial fuse checks and they were OK. Thanks Again. I will keep you Posted John G1LCC PS. I have a copy of the Manual.