Sherwood S-7110(B?)

[R-2-R]

Have a Sherwood S-7110 receiver but it could be a B model from what the manual(s) from HiFiEngine show?

Anyway it suffers from a couple of known common problems that Sherwood receivers are known for.

1.) The dreaded ON/OFF switch either needs to be replaced or repaired. Currently have it connected to a power strip and use that as it's on/off source but would really like to repair the original switch itself. Have searched here on AK on a few threads that indulge in that specific topic, etc. so it's something to go on.

2.) One Channel (Right) has diminished (not gone out completely) but not totally. This problem occurs only when setting the switch to FM or AM and having to adjust the Left/Right control knob to compensate for balanced volume. The strange thing about it all is that when setting the switch to AUX both LEFT & RIGHT Channels work perfectly? Go figure.

Regardless, any help on how to proceed on correcting the problem would be very much appreciated.

Thank y'all in advance!

 

[A23gt]

What have you done to it so far? Have the controls received a good deoxit cleaning yet? What do you think of the sound, or have you only brought it up on sacrificial speakers so far?

I would be interested in hearing what the more knowledgeable folks think about the am/fm weak channel. I wonder if the issue is with the tuner or the multifunction selector switch.

 

[dly66]

Fixed the broken power switch in my S-7200. Opened up the power switch (on the back of the volume control) and epoxied the split plastic disk back into place. Looking at that little plastic piece a bit surprising they last as long as they do. Too bad I did not take pictures of what I did. Then again if the switch in the S-8900A fails may get another chance.

Right channel down is interesting, especially considering AM is mono so both channels should have same signal. Function selector may need a good cleaning or some work.

 

[R-2-R]

I purchased the receiver back in 2016 ($20 bucks at a yard sale) and at that time I cleaned the entire inside, deoxit'd all switches, etc. so it was clean and has stayed clean. Regardless of what type(s) of speakers it is connected to, the receiver gives out a very nice sound, AM sounds good and especially when in FM Stereo.

Thing is back then the only problem with it was that the ON/OFF switch was broken, other than that, the receiver sounded really good (and still does with the exception of the the RIGHT Channel now going out).

The RIGHT Channel has gradually been diminishing over a short period of time.

Still though I find it interesting that when switched in AUX mode both LEFT & RIGHT Channels sound excellent.
I use the AUX mode, which is connected to an ECHO DOT, when listening to my playlist from my iPhone.

The receiver does not have TAPE select (but does have Tape mode button) and I have not tried PHONO (and don't plan on ever doing so either).
So basically I don't really care if LEFT or RIGHT would work on Tape or Phone or not because I won't be using either of those modes.

 

[A23gt]

I purchased the receiver back in 2016 ($20 bucks at a yard sale) and at that time I cleaned the entire inside, deoxit'd all switches, etc. so it was clean and has stayed clean. Regardless of what type(s) of speakers it is connected to, the receiver gives out a very nice sound, AM sounds good and especially when in FM Stereo.

Thing is back then the only problem with it was that the ON/OFF switch was broken, other than that, the receiver sounded really good (and still does with the exception of the the RIGHT Channel now going out).

The RIGHT Channel has gradually been diminishing over a short period of time.

Still though I find it interesting that when switched in AUX mode both LEFT & RIGHT Channels sound excellent.
I use the AUX mode, which is connected to an ECHO DOT, when listening to my playlist from my iPhone.

The receiver does not have TAPE select (but does have Tape mode button) and I have not tried PHONO either (and don't plan on ever doing so either).
So basically I don't really care if LEFT or RIGHT would work on Tape or Phone or not because I won't be using either of those modes.

I’ve had Sherwoods sitting in their box that required cleaning again after not being used. It’s almost like oxidation finds them wherever they hide. It could be the humidity of where I live. Next time I store I might try putting some of those dehumidifier packets in the box and see if that helps.

 

[dly66]

You might also check wiring and for any bad solder joints in that part of the signal path. On my S-7200 a number of small wires made the connections to the pots and ran across the edge of the board and I got victimized a few times by apparently putting too much stress on some of them when working on the board and the fine stranded wire would break at a pot soldering tab. Was not easy to find them. Have had a number of poor/cracked solder joints bring down channels in a few old units too. Had an intermittent drop in the S-8900A apparently one of the solid wires running between the tone board and the tape monitor had cracked at a sharp bend. Drove me a bit crazy trying to find that one.

I created a modified lead to my headphone amp so I can tap into circuits and listen it has been a help in figuring out where the signal dies. Helped a lot with the S-8900A. Also on the SX-1500TD. FM stereo output died on it. With headphone amp found nice sounding signal to MPX chip, nothing was coming out on L or R channel output. Replacements pretty much obsolete but someone was selling some NOS ECG ones, put it in working FM stereo again. If one had an old unused powered computer speaker and modify the input wire and put clips on it they should be able use it to listen at certain points. Or pick on up cheap at a Goodwill or the like.

 

[miltaryman]

Hi, Im trying to find info on the beautiful silver faced Sherwood receivers between 77-80.
I fell in lust with one an older friend of mine had back then and would like to get one now.
What were the highest wpc of those models?
Ive only found up to the 7650.
thank

 

[A23gt]

The S-9910 and CP-110 at 100 watts per channel were the highest rated in that timeframe. Great receivers and I still listen to the S-9910 from time to time. The HP2000 integrated amplifier is the highest rms rated equipment they made at the time. 120 wpc rms and made in Chicago. The receivers were made in Japan by this point in Sherwood’s history.

 

[miltaryman]

Ufff, they may thump at 100wpc, but theyre ugly. I want the clean straight across silver faced ones (no Black).
Like this beautiful creature:

 

[A23gt]

Ufff, they may thump at 100wpc, but theyre ugly. I want the clean straight across silver faced ones (no Black).
Like this beautiful creature:

The receiver you posted is early eighties, and made in Korea after Sherwood was sold to Inkel.

They aren’t too bad, but most of them use STK modules. (I have the very receiver you posted waiting for an STK module for the right channel)
Quality is much better on the ones I mentioned.

Beauty is in the eye of the beholder as I prefer the 70’s Sherwood look. Most of the CP series look like a Sherwood had sex with an x50 series Pioneer to me.

 

[miltaryman]

I think that 7650 is 1979, and yes, Im aware the 70's ones are thumpier and better quality. Im chasing an image from my teens when I thought that receiver was spectacular "looking", and I still believe so. So Im not chasing quality, Im chasing nostalgia. So my question was referring to the fact of whether or not there was a silver-faced Sherwood that had more wpc than the 7650, or was the 7650 (at 40wpc) as thumpy (with the silver face and white meters) as it got with that look. Because if someone told me, "No, theres a 7950 with the same look and it puts out 80wpc, then Id search the earth for it. But if someone said, "Nope this is the TOTL for the completely faced silver ones", then Id buy (which I actually did this morning on the auction site for $175 bc Id didnt wanna chance it being sold to someone else).
So, I probably phrased my initial question incorrectly...not the 1st time...lol

 

[miltaryman]

And yes, I did notice it resembled the Pioneer series, EXCEPT, that the Sherwood looks cleaner and classier bc it has the double white/silver frequency meters, and the Pioneers are black (at least the ones Ive seen).

 

[miltaryman]

The receiver you posted is early eighties, and made in Korea after Sherwood was sold to Inkel.

They aren’t too bad, but most of them use STK modules. (I have the very receiver you posted waiting for an STK module for the right channel)
Quality is much better on the ones I mentioned.

Beauty is in the eye of the beholder as I prefer the 70’s Sherwood look. Most of the CP series look like a Sherwood had sex with an x50 series Pioneer to me.

So whats a stk module and what happens when it goes bad? And will I likely encounter that issue?

 

[A23gt]

I think that 7650 is 1979, and yes, Im aware the 70's ones are thumpier and better quality. Im chasing an image from my teens when I thought that receiver was spectacular "looking", and I still believe so. So Im not chasing quality, Im chasing nostalgia. So my question was referring to the fact of whether or not there was a silver-faced Sherwood that had more wpc than the 7650, or was the 7650 (at 40wpc) as thumpy (with the silver face and white meters) as it got with that look. Because if someone told me, "No, theres a 7950 with the same look and it puts out 80wpc, then Id search the earth for it. But if someone said, "Nope this is the TOTL for the completely faced silver ones", then Id buy (which I actually did this morning on the auction site for $175 bc Id didnt wanna chance it being sold to someone else).
So, I probably phrased my initial question incorrectly...not the 1st time...lol

I think You found the top of the line for that style. The next model CP’s look similar, but went back to a dark tuner dial.

 

[dly66]

Looking at the schematic of the the S-7650CP at hifiengine it shows discrete output transistors so no STK type amplifier modules. Blown amplifier circuits not uncommon in vintage units. The older they are more likely to be having issues unless already serviced.

 

[A23gt]

Looking at the schematic of the the S-7650CP at hifiengine it shows discrete output transistors so no STK type amplifier modules. Blown amplifier circuits not uncommon in vintage units. The older they are more likely to be having issues unless already serviced.

That’s weird. I have one with a channel out, and I would have sworn it had STK modules. I’ll have to dig it out and open it up. It wasn’t a bad sounding receiver, and it’s worthy of putting a little money into if it doesn’t have semi unobtainable parts.

 

[dly66]

That’s weird. I have one with a channel out, and I would have sworn it had STK modules. I’ll have to dig it out and open it up. It wasn’t a bad sounding receiver, and it’s worthy of putting a little money into if it doesn’t have semi unobtainable parts.

Found another copy of the S-7650CP service manual at the akdatabase site pictures in it show TO-3 type outputs on the heat sink listed as 2SB557 and 2SD427 pairs in the parts list and on schematic.

AK Database PDF Gallery - Sherwood/Sherwood S7650CP Service Manual