1. Home
  2. Electronics Repair
  3. Marantz sr-63 problem

Marantz sr-63 problem

I have a mid '90s Marantz SR-63 receiver which has had an escalating problem with the blinking pre-on symptom. At first it might take 2-5 min to clink on then everything was fine until turned off again. But now it's gotten so that only after at least half an hour does the amp click on, but then it's only intermittent as I can hear it clicking on an off every few seconds or sometimes minutes.

Googling through the archives I found reference to this problem and an apparent solution. I have quoted the gist of that discussion below;

>Subject: Re: need help- marantz reciver model:sr-50 > >> >>Don't know if this helps, but the SR-63 and SR-82 had this problem resulting >>from a small capacitor bad in the power supply area. Can't quite remember >>the value - I think it was 2.2 uF. It was a small yellow electrolytic. >>It was used to lightly filter a dc line, then this reference was used for >>the sharp cut-off function at power-off. >>When the machine is turned off, it cuts off the speaker relay quicker this >>way. With the bad cap, the protection just stays engaged. >the problem was a bad yellow 47u@50v capacitor in power supply

The last author reported fixing the problem by swapping out this cap. My problem is I can't locate that capacitor. I don't have a whole lot of experience in electronics repair but I'm perfectly comfortable swapping out a capacitor as long as I know which one is the culprit.

So I've looked over the PS area inside the unit and I don't see any components with markings to indicate that one is a 47u@50v capacitor.

Anyone familiar enough with this problem and the Marantz units to help me locate the (potentially) offending cap? Thanks.

Reply to
Kevin Van Sant
Loading thread data ...

Nice to see my old quote! That was a 2.2 uF capacitor, near one of the small voltage regulator IC's. Most of them were yellow in color. The guy I was helping found a 47uF in his, but it was a different model.

Mark Z.

Reply to
Mark D. Zacharias

hi Mark, I'm glad to see a response from you, I remember your name from reading those older posts. I have been basing my search for the offending capacitor on your earlier description of a yellow 2.2uF, but I'm not seeing that on the PS board. Have you seen this on an SR-63 specifically? The other guy had an SR-50 I think. As I wrote before, this isn't really something I've got much experience in but I'm not afraid to dig into it, so any help in targeting that particular capacitor would be appreciated. Would a picture be useful? Thanks.

Kevin

Reply to
Kevin Van Sant

Ok, never mind this last question, I have located it. (I had been looking around the PS switch area not the PS supply area.) Looks like a lot of digging in to do but I'll give it a shot.

_________________________________________ Kevin Van Sant jazz guitar

formatting link
to buy my CDs, hear sound clips, see videos, and get more info.

Visit my new Instant Download Mp3 Store at:

formatting link

Alternate site for gig tape soundclips

formatting link

Reply to
Kevin Van Sant

To answer your question, yes. I've done lots of SR-63's with this problem. If you can't find the cap pretty quick, I'll get the location for you. With the cover off and the front of the piece toward you, look over the top about 4 inches in, and 5 inches or so in from the right side. You'll see several components in a browned "baked" area. That's where the cap is. To the left of one of the regulator heat sinks, as I recall.

Mark Z.

Reply to
Mark D. Zacharias

Mark, thanks a bunch. I had to wait for the capacitors to arrive by mail, but they got in today. and five minutes later the Marantz is fixed. I do love the usenet archives for this sort of thing. Saved me $100 at least.

_________________________________________ Kevin Van Sant jazz guitar

formatting link
to buy my CDs, hear sound clips, see videos, and get more info.

Visit my new Instant Download Mp3 Store at:

formatting link

Alternate site for gig tape soundclips

formatting link

Reply to
Kevin Van Sant

Hoo-Hoo!

mz

Reply to
Mark D. Zacharias

Fixed one with this problem day before yesterday. Wish all our repairs were this easy. I'm getting lazy in my old age.

Mark Z.

Reply to
Mark D. Zacharias

Hi, It seems to me i have the same problem. the pre-amp display doesn't turn off and the amplifier doesn't click on. I have a sr-50. Is it the same part i have to replace? If so, where is it on the sr-50 (from what i've seen there are a few (three i think)). How much does a part like this suppose to cost? and my final question is where can i get it? Thanks alot :). Dan.

--
dan kot
Reply to
dan kot

The SR-63 gets a 2.2 uF capacitor bad in the protect circuit. Don't know if this applies to the SR-50.

Mark Z.

Reply to
Mark D. Zacharias

Does it mean i have to replace the capacitor?

How much does a part like this suppose to cost? Where can i but it from? Thanks. Dan.

--
dan kot
Reply to
dan kot

IF it's an SR-63, yes, the cap would need to be replaced. The part is cheap but a technician's labor not so cheap. The SR-50 probably has a capacitor performing the same function in it's protection circuit - but the rating and physical location may very well be different.

If you're not a tech type, and it certainly seems as if you are not, I have little else to offer. I don't have a schematic on an SR-50, and this newsgroup is really designed for those with at least a certain technical competence, not just a vehicle for those too cheap to pay for a repair.

Mark Z.

Reply to
Mark D. Zacharias

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.