Yamaha part info

Archived from groups: rec.audio.tech (More info?)

I have a Yamaha AX-570 amplifier with a dirty input selector. The left side
is very touchy on all but the aux input. Is there any possibility of
getting a replacement part any more, or some way to clean up the selector?
I have
already have it apart once and "cleaned" it with some lithium grease spray,
which worked great for a few months, but it's starting to revert back to its
old self now.

Archived from groups: rec.audio.tech (More info?)

"JM" <jmsn@ns.sympatico.ca> wrote in message
news:SzPKd.221046$Np3.9261984@ursa-nb00s0.nbnet.nb.ca...
>I have a Yamaha AX-570 amplifier with a dirty input selector. The left
>side
> is very touchy on all but the aux input. Is there any possibility of
> getting a replacement part any more, or some way to clean up the selector?
> I have
> already have it apart once and "cleaned" it with some lithium grease
> spray,
> which worked great for a few months, but it's starting to revert back to
> its
> old self now.

**Buy a new switch. This is a common fault. BTW: Lithium grease is ONLY a
mechanical grease. It should NOT be used for electrical contacts.


--
Trevor Wilson
www.rageaudio.com.au

Archived from groups: rec.audio.tech (More info?)

"Trevor Wilson" <trevor@SPAMBLOCKrageaudio.com.au> wrote in message
news:3625tgF4e84hfU1@individual.net...
> **Buy a new switch. This is a common fault. BTW: Lithium grease is ONLY a
> mechanical grease. It should NOT be used for electrical contacts.

Well, I've heard so many different stories on what to use and what not to
use in cases like this, I wasn't sure what to try. Back in the old days I
used to shoot WD-40 into the pots on my old Radio Shack amp, which would
work pretty well for a while, but then I read that was bad. I then heard
about electronic control cleaner, used it a few times, but then read it was
bad, and I came across a few suggestions of lithium grease for this kind of
problem, so I tried it. Can't see that it would cause any more harm than
WD-40.

As for the new part, any ideas where I should look other than just Yamaha
themselves?

Archived from groups: rec.audio.tech (More info?)

"JM" <jmsn@ns.sympatico.ca> wrote in message
news:g1SKd.221174$Np3.9266957@ursa-nb00s0.nbnet.nb.ca...
>
> "Trevor Wilson" <trevor@SPAMBLOCKrageaudio.com.au> wrote in message
> news:3625tgF4e84hfU1@individual.net...
>> **Buy a new switch. This is a common fault. BTW: Lithium grease is ONLY a
>> mechanical grease. It should NOT be used for electrical contacts.
>
> Well, I've heard so many different stories on what to use and what not to
> use in cases like this, I wasn't sure what to try.

**Then you need to ask people who actually know what they are talking about.
That would be people who actually repair stuff. Lithium grease is just a
dumb choice. Never listen to the people who suggested such a thing, ever
again.

Back in the old days I
> used to shoot WD-40 into the pots on my old Radio Shack amp, which would
> work pretty well for a while, but then I read that was bad.

**It always was bad. WD-40 is a Water Displacement oil. It should never be
used as a contact conditioner. Again, you listened to bad advice.

I then heard
> about electronic control cleaner, used it a few times, but then read it
> was
> bad,

**A quality contact cleaner is the ONLY product to use.

and I came across a few suggestions of lithium grease for this kind of
> problem, so I tried it. Can't see that it would cause any more harm than
> WD-40.

**I can. Lithium is conductive. At least WD-40 is an insulator.

>
> As for the new part, any ideas where I should look other than just Yamaha
> themselves?

**No. Buy the Yamaha part from Yamaha. You have been instructed to do this,
several times. Listen to the people who actually know what they're talking
about, rather than idiots, who don't have a clue. As Mark correctly stated,
Yamaha now supply an improved version of this switch.


--
Trevor Wilson
www.rageaudio.com.au

Archived from groups: rec.audio.tech (More info?)

"JM" <jmsn@ns.sympatico.ca> wrote in message
news:grUKd.221322$Np3.9270622@ursa-nb00s0.nbnet.nb.ca...
>
> "Trevor Wilson" <trevor@SPAMBLOCKrageaudio.com.au> wrote in message
> news:362h4nF4shca0U1@individual.net...
>> **Then you need to ask people who actually know what they are talking
> about.
>> That would be people who actually repair stuff. Lithium grease is just a
>> dumb choice. Never listen to the people who suggested such a thing, ever
>> again.
>
> Ok. It's hard to tell who knows what they're talking about and who
> doesn't
> just from a Google search or a few usenet posts though. Anyway it's my
> gear, and those were my choices, but I guess I'll consider myself
> enlightened. What do you recommend as a good, safe contact or control
> cleaner that is available to the average consumer?

**I don't know what is available in Canada. I use a couple of products, here
in Australia, which may (or may not) be available in Canada. They include:

RF58
CRC2001, CRC2004
Electrolube SOB200M

HOWEVER, you are wasting your time with cleaning. REPLACE THE DAMNED SWITCH!

>
>> > As for the new part, any ideas where I should look other than just
> Yamaha
>> > themselves?
>> **No. Buy the Yamaha part from Yamaha. You have been instructed to do
> this,
>> several times. Listen to the people who actually know what they're
>> talking
>> about, rather than idiots, who don't have a clue. As Mark correctly
> stated,
>> Yamaha now supply an improved version of this switch.
>
> Fine, I was only asking because I was unsure whether the part would still
> be
> available from Yamaha.

**You need to call them and ask.

> Does anyone have the part number for the input selector handy? Might come
> in handy if there's any doubt when I'm talking to them.

**It may. However, the part fails so often that Yamaha will know EXACTLY
what you require.

>
> Thanks for all the info so far.

**S'OK.


--
Trevor Wilson
www.rageaudio.com.au

Archived from groups: rec.audio.tech (More info?)

This is a common defect in many amplifiers. Order the original part from
Yamaha. There is no other reliable source, unless it is a Yamaha parts
dealer.

If you use any type of cleaner in an electronic switch, pot, control, and
whatever, it must be rated for the application. There are a verity of switch
(contact cleaners) and pot cleaners on the market.

You should never use any automatic grease, or oil in these devices. Any
lubricants you use, must be properly rated.

Using WD-40, and many of the non rated petroleum products in electronic
equipment can be dangerous for fire. Many of these non rated ones can be
highly flammable, and very toxic when burning. .

--

Jerry G.
=====

"JM" <jmsn@ns.sympatico.ca> wrote in message
news:SzPKd.221046$Np3.9261984@ursa-nb00s0.nbnet.nb.ca...
I have a Yamaha AX-570 amplifier with a dirty input selector. The left side
is very touchy on all but the aux input. Is there any possibility of
getting a replacement part any more, or some way to clean up the selector?
I have
already have it apart once and "cleaned" it with some lithium grease spray,
which worked great for a few months, but it's starting to revert back to its
old self now.

Archived from groups: rec.audio.tech (More info?)

In <3641bmF4ski23U1@individual.net>, on 01/30/05
at 06:13 AM, "Mark D. Zacharias" <mzacharias@yis.us> said:

[ ... ]

>If it puts your mind to rest a bit, I'm an authorized Yamaha servicer
>in Wichita, KS. You can consider the info on the new switch to be
>authoritative.

>The switch is constructed like several vcr mode switches in a large
>housing. The internal contacts get so tarnished they barely work.

To set everyone's mind to rest -- The current and replacement switches
use improved technology. I don't recall having any of the new switches
fail.

Each series of units (from any manufacturer) has it's Achilles Heel.
Sometimes it can be quite silly such as an adhesive that becomes
conductive after 10-15 years, a lamp failure that impedes operation, a
resistor that ran close to the limit and gave out after 15 years, a
particular soldered connection, and on and on. Typically, a given model
will fail in one or two characteristic patterns. Servicers eventually
figure out each unit's pattern.

With this series of Yamaha units, it is that switch. These units don't
fail often, but when they do, it is almost always that switch.
Unfortunately, I can't tell you the exact percentage of those switches
that will eventually fail or when they might fail. I only get to see
the units that have failed and the customer wants repaired. I never
hear about the units that continue to work flawlessly or the ones that
customers replace without repairing.

While some switches respond well to cleaning, this series does not.

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