If you get into one of these to clean switches and such, this contact behind the plastic can produce a lot of noise until very well cleaned.


Jim

The A-60certainly is an eye-catcher. What really got me drooling, though, is the Sui tuner.

I´m fast becoming a sucker for vintage tuners. Gotta get me a Sansui one of these days.

Jorge

Hi! I have this great Pioneer A-60. He serves me very good for a year and few mounths more. This is the only link I found about it`s cleaning (contacts, buttons,...). Actually, I have a little problem with a selector button for CD/AUX. I have to clean it, because it causes a little noise. Indeed, the left speaker can lost a signal, it breaks out than I don`t push this selector very nice. What`s the procedure to clean this CD/AUX selector in a safe way, without any damages? Thanks a lot! Best regards!

Welcome to Sound-Thinking.



The circled switches are the ones you are refering to, the bottom one being the CD/AUX, to properly clean this switches you will need some DeOxit5 or a comparable cleaner, you will need to remove the covers to get access to the back of the switches, spraying cleaner in the front of a switch is a waste of cleaner, you should be able to see inside of the switch while you are operating it, spray the cleaner into the inside of the switch and work the switch several times, you will need the straw attachment to reach down inside, do the procedure several times, Allow to dry and hook a source and speakers and see if it is clean, if not repeat.

What I found with my unit was the contact I refer to in the last picute above caused me more trouble as far as noise than any other, it would just speratically appear until I had this contact well cleaned, it took several attempts.

Let us know how it works out.

While you are in there clean the other potentiometers and switches, they can be dirty also, the balance control on some units can cause a lot of issues to do the little amount of use it sees.

Jim

Thank you very much on your fast and detail explanation! I will try this cleaning probably tomorrow, than I buy set for cleaning (WD 40 spray- if you heard), and I will tell you what happened.

DO NOT USE WD-40!!!!!!!!!!!!!!!!!!!

WD-40 is very bad for finer electronics!!! Get a good grade of contact cleaner if you can't get DeOxit, if you like your amp at all DO NOT USE WD-40!

Be careful, some solvents can do more damage than good, WD_40 has water in it, very bad.

Jim

I hate Pioneer micro-switches from the mid-Eighties. Difficult to clean and very small contacts.

The little ba-tard I am refering to has small contact points similar to old car points only smaller, very difficutlt to get clean and make a lot of noise when they are dirty.

Jim

Well, I took off the front cover, and now my amp looks like this one on posted image. Now, the question is from where could I infuse the cleaner? Is it from the right side of the switch, like on this image, or how? Is it necessarily to remove out the whole mainboard behind (it`s so hard, because of the pots for bass, treble, balans), or is it possible to do all job without removing the board? I thought to infuse the cleaner with straw from the right side of the switch, like the yellow arrow shows...It has a very little button hole from that right side. Is it okay to do that on this way?

wow, you and jim have similar bench's and sansui's

elroy

That`s his amp and tuner, not mine.

I succesfully finished the cleaning of my Pioneer A-60. I done that with a holland cleaner called "Valma". For now, I solve my problem about cd/aux switch and I treat preventive and all others switches and pots. It wasn`t so hard as I thougth it will be. Thanks a lot for help, Jim! Greetings!

Yes, that was the way in. Glad to hear all has went well. Pots and switches are they biggest problem that is easily solved that happens to electronics.

Stick around and have some fun with us. Others here may be able to answer your speaker question.

Jim

Jim,

Is that a Sansui 5900 or 7900 tuner?

I have a 5900 and it's fantastic.

7900 I have 7700 in my main system.

Jim