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Yamaha CR 620

T

teleforman

New Member
I have a 30 year old Yamaha CR 620 receiver that has developed a nasty little scratchy left channel. Anyone have any idea what it is and how to fix it?

Someone told me this receiver was a great receiver for the time and sonically it challenges good new ones. Any truth to that? thanks guys and gals!!!
 
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You have come to the right place-welcome to AK!!

The CR-620 was my first Yamaha...

Ah the left scratchy channel syndrome...with your 620 unplugged and the lid off, reach the long thin red straw on a can of DeoxIT D5 into the potentiometers (pots) and switches, and work them back and forth for a good 5 minutes...you might need to do it a couple of times, but it just takes a small spritz at each. This will clean off the years of corrosion and dirt within the pots.

Wait a couple of hours, and plug it back in and presto...there SHOULD be no more scratchiness and you are ready for another 10 years.

This occurred with my CA-810 and now it's all-better. If the scratchiness is still there...it could be something else, and others will pipe in on other possibilities, but start simple first.
 
wajobu gave you great advice. Where are you located? There are AK members all over the world and if you are not comfortable cleaning the receiver I bet if a member is local they'd give you a hand.
 
yeah the little yammies are dandy, better than a lot of new stuff. better looking too. definitely a keeper... welcome!
 
thanks all.

Great advice all. Thanks. I am a newbie from Columbia Maryland, not too far from Merrylander, another member. I have not met him yet but look forward to it.

From what I have seen this is a way cool site and i look forward to picking everyones brain. Thanks again.
 
teleforman said:
Great advice all. Thanks. I am a newbie from Columbia Maryland, not too far from Merrylander, another member. I have not met him yet but look forward to it.

From what I have seen this is a way cool site and i look forward to picking everyones brain. Thanks again.
Click to expand...

You are in luck! Send him a PM he is our Yamaha specialist. :thmbsp:
 
Welcome to AK. I've got one CR 620 and hope to have another for my office system soon (from Merrylander). What follows are my general cleaning instructions. Deoxit can be purchased at Guitar Center.

1) Unplug the unit. Electricity + liquid = shock.
2) Open unit.
3) Spray deoxit into pots one at a time. Pots are the moving thingies inside the unit on the other side of the knobs and buttons you use to operate the unit. Use three good bursts per pot or one good burst for every obvious hole in the pot. An old towel on the bottom will save your work bench from the drips.
4) Do not spray the tuner gang. If you do not know what this is, stick to spraying the moving thingies that are just on the other side of the knobs and buttons. Don't fret if any deoxit gets on the boards -- it's OK.
5) Turn each knob, switch, or button (on the outside) full range in a gentle but firm fashion after spraying its corresponding pot on the inside. Do this about 50 times per pot. The object is to spread the deoxit around.
6) Let dry overnight. You can let it dry less, but why take the chance.
7) Close unit.
8) Play and enjoy.

Ken
 
I really have to get back in the shop, I have a CR-620, a CR-800, a CR-1020, a PX-3 and a YP-D71 all in need of work but I have to clear other peoples stuff first and some of those units are being hard to get along with. I have a nice clean Kenwood KR-4070 that had been cleaned, aligned and adjusted and a pretty little CA-600 (no Class A on that one) but it needs the case veneered and then it will be auctioned for AK.

Despite snowflakes earlier this AM everything is growing like mad, so there go the weekends.
 
merrylander said:
Despite snowflakes earlier this AM everything is growing like mad, so there go the weekends.
Click to expand...

Sounds like I need to drive up during lunch hour with my lawnmower. Or, better yet, put young Eric to work.:D
 
Our gardner called last night so he will be by this evening for as long as the light holds, with luck the tractor will be back this afternoon. I forgot the CR-2040 that is still waiting restoral and veneer, but it is already spoken for. There is going to be a garage sale once all of this stuff is fixed as I need to have the tables and benches cleared so that I can re-arrange the shop. Got a bunch of window screens that need new nylon mesh and I am not going to do that on the floor.
 
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