Identification for onboard switch needed (Receiver Pioneer A

[Jens Herrmann]

Hello,
the source selection on the front panel of the Pioneer A-331 has 6
switches of which 4 are temporary switches (source) and 2 are permanent
switches (tape monitor). They have stopped working properly and I was
not able to fix the problem with contact spray this time. Now I want to
replace them but cannot identify the brand and model.

Take a look at
http://img3.fotos-hochladen.net/uploads/pioneera331woivr6zn0p.jpg
The footprint on the bottom side is a 2x6 dil -> 12 contact pins. Note
that it is not possible to use a random model switch with the same
footprint as there is a release mechanism which then would not work
anymore. Thats why the blue knobs have the shape they have.

Regards
Jens

 

[Phil Allison]

"Jens Herrmann"

Hello,
the source selection on the front panel of the Pioneer A-331 has 6
switches of which 4 are temporary switches (source) and 2 are permanent
switches (tape monitor). They have stopped working properly and I was not
able to fix the problem with contact spray this time. Now I want to
replace them but cannot identify the brand and model.

Take a look at
http://img3.fotos-hochladen.net/uploads/pioneera331woivr6zn0p.jpg

** There is no sign of residue on the switches in the pic.

So you used an evaporative contact spray like Freon or IPA.

IME, usually only of short term benefit - if any at all.

Try some WD40 or similar spray lubricant - seriously bet it makes all the
switches work again.



.... Phil

 

[Jens Herrmann]

On 08/06/2013 11:49 AM, Phil Allison wrote:

** There is no sign of residue on the switches in the pic.
So you used an evaporative contact spray like Freon or IPA.
Yes evaporative, but I had to open the switches to apply it.

Try some WD40 or similar spray lubricant - seriously bet it makes all the
switches work again.
I would prefer to replace them as the switch mechanism inside did not

look very well.

Jens

 

[Phil Allison]

"Jens Herrmann"

Phil Allison wrote:

** There is no sign of residue on the switches in the pic.
So you used an evaporative contact spray like Freon or IPA.

Yes evaporative, but I had to open the switches to apply it.

** Silly, risky thing to do.

WD40 works in seconds with no disassembly.

Try some WD40 or similar spray lubricant - seriously bet it makes all
the
switches work again.

I would prefer to replace them as the switch mechanism inside did not look
very well.

** You have NOTHING to lose by TRYING my suggestion.

Been working near miracles for me, nearly every day, for 40+ years.



.... Phil

 

[N_Cook]

On 06/08/2013 09:19, Jens Herrmann wrote:

Hello,
the source selection on the front panel of the Pioneer A-331 has 6
switches of which 4 are temporary switches (source) and 2 are permanent
switches (tape monitor). They have stopped working properly and I was
not able to fix the problem with contact spray this time. Now I want to
replace them but cannot identify the brand and model.

Take a look at
http://img3.fotos-hochladen.net/uploads/pioneera331woivr6zn0p.jpg
The footprint on the bottom side is a 2x6 dil -> 12 contact pins. Note
that it is not possible to use a random model switch with the same
footprint as there is a release mechanism which then would not work
anymore. Thats why the blue knobs have the shape they have.

Regards
Jens

Even robbing a salvaged one is problematic as the plastic body of those
sort of switches can only take the bare minimum of soldering heat before
they start to deform. Can you wire in switches to somewhere that has
more space and can take more conventional switches , assuming you cannot
find an exact replacement. I've burrowed inside similar switches and I
would say they are next to impossible to rebuild, even if you can safely
get them apart with their sub-mm parts

 

[Tim Schwartz]

On 8/6/2013 4:19 AM, Jens Herrmann wrote:

Hello,
the source selection on the front panel of the Pioneer A-331 has 6
switches of which 4 are temporary switches (source) and 2 are permanent
switches (tape monitor). They have stopped working properly and I was
not able to fix the problem with contact spray this time. Now I want to
replace them but cannot identify the brand and model.

Take a look at
http://img3.fotos-hochladen.net/uploads/pioneera331woivr6zn0p.jpg
The footprint on the bottom side is a 2x6 dil -> 12 contact pins. Note
that it is not possible to use a random model switch with the same
footprint as there is a release mechanism which then would not work
anymore. Thats why the blue knobs have the shape they have.

Regards
Jens
Have you tried contacting Pioneer's parts department in your area?

--Tim

 

[Rheilly Phoull]

On 06/08/13 18:20, Phil Allison wrote:

"Jens Herrmann"
Phil Allison wrote:

** There is no sign of residue on the switches in the pic.
So you used an evaporative contact spray like Freon or IPA.

Yes evaporative, but I had to open the switches to apply it.

** Silly, risky thing to do.

WD40 works in seconds with no disassembly.


Try some WD40 or similar spray lubricant - seriously bet it makes all
the
switches work again.

I would prefer to replace them as the switch mechanism inside did not look
very well.

** You have NOTHING to lose by TRYING my suggestion.

Been working near miracles for me, nearly every day, for 40+ years.



... Phil


Hey Phil,

How does the WD40 go for pots ?
I have always thought it was short term and destructive.

 

[Phil Allison]

"Rheilly Phoull"

Phil Allison wrote:
"Jens Herrmann"
Phil Allison wrote:

** There is no sign of residue on the switches in the pic.
So you used an evaporative contact spray like Freon or IPA.

Yes evaporative, but I had to open the switches to apply it.

** Silly, risky thing to do.

WD40 works in seconds with no disassembly.


Try some WD40 or similar spray lubricant - seriously bet it makes all
the
switches work again.

I would prefer to replace them as the switch mechanism inside did not
look
very well.

** You have NOTHING to lose by TRYING my suggestion.

Been working near miracles for me, nearly every day, for 40+ years.


How does the WD40 go for pots ?

** If a squirt of WD40 does not restore good operation - nothing else
will.

But be very careful with linear faders as it can dissolve the grease that
gives them a nice feel - if possible, open them up and clean the track and
wipers with a rag and small brush dipped in WD40.

I have always thought it was short term and destructive.

** Nonsense.


.... Phil

 

[dave]

On 08/06/2013 03:20 AM, Phil Allison wrote:

"Jens Herrmann"
Phil Allison wrote:

** There is no sign of residue on the switches in the pic.
So you used an evaporative contact spray like Freon or IPA.

Yes evaporative, but I had to open the switches to apply it.

** Silly, risky thing to do.

WD40 works in seconds with no disassembly.

WD40 is known to delaminate pc boards.

 

[dave]

On 08/06/2013 01:19 AM, Jens Herrmann wrote:

Hello,
the source selection on the front panel of the Pioneer A-331 has 6
switches of which 4 are temporary switches (source) and 2 are permanent
switches (tape monitor). They have stopped working properly and I was
not able to fix the problem with contact spray this time. Now I want to
replace them but cannot identify the brand and model.

Take a look at
http://img3.fotos-hochladen.net/uploads/pioneera331woivr6zn0p.jpg
The footprint on the bottom side is a 2x6 dil -> 12 contact pins. Note
that it is not possible to use a random model switch with the same
footprint as there is a release mechanism which then would not work
anymore. Thats why the blue knobs have the shape they have.

Regards
Jens

Digikey or Mouser should have those. I have a bunch on an intercom
control panel..They aren't that rare. Half the battle is finding the
correct nomenclature.

 

[dave]

On 08/06/2013 06:56 AM, Phil Allison wrote:

"Rheilly Phoull"
Phil Allison wrote:
"Jens Herrmann"
Phil Allison wrote:

** There is no sign of residue on the switches in the pic.
So you used an evaporative contact spray like Freon or IPA.

Yes evaporative, but I had to open the switches to apply it.

** Silly, risky thing to do.

WD40 works in seconds with no disassembly.


Try some WD40 or similar spray lubricant - seriously bet it makes all
the
switches work again.

I would prefer to replace them as the switch mechanism inside did not
look
very well.

** You have NOTHING to lose by TRYING my suggestion.

Been working near miracles for me, nearly every day, for 40+ years.


How does the WD40 go for pots ?

** If a squirt of WD40 does not restore good operation - nothing else
will.

But be very careful with linear faders as it can dissolve the grease that
gives them a nice feel - if possible, open them up and clean the track and
wipers with a rag and small brush dipped in WD40.

I have always thought it was short term and destructive.

** Nonsense.


... Phil

DeOxit Red is what I use for rotary pots. Deoxit Gold for switches and
jacks. They make a DeOxit for linear pots, but it often makes things
worse. Use a swab with Lubriplate, after careful diassembly and cleaning.

 

[N_Cook]

On 06/08/2013 16:09, dave wrote:

On 08/06/2013 06:56 AM, Phil Allison wrote:
"Rheilly Phoull"
Phil Allison wrote:
"Jens Herrmann"
Phil Allison wrote:

** There is no sign of residue on the switches in the pic.
So you used an evaporative contact spray like Freon or IPA.

Yes evaporative, but I had to open the switches to apply it.

** Silly, risky thing to do.

WD40 works in seconds with no disassembly.


Try some WD40 or similar spray lubricant - seriously bet it makes
all
the
switches work again.

I would prefer to replace them as the switch mechanism inside did not
look
very well.

** You have NOTHING to lose by TRYING my suggestion.

Been working near miracles for me, nearly every day, for 40+ years.


How does the WD40 go for pots ?

** If a squirt of WD40 does not restore good operation - nothing else
will.

But be very careful with linear faders as it can dissolve the grease that
gives them a nice feel - if possible, open them up and clean the
track and
wipers with a rag and small brush dipped in WD40.

I have always thought it was short term and destructive.

** Nonsense.


... Phil


DeOxit Red is what I use for rotary pots. Deoxit Gold for switches and
jacks. They make a DeOxit for linear pots, but it often makes things
worse. Use a swab with Lubriplate, after careful diassembly and cleaning.

going by what looks like broken pcb in that photo, then likely
mechanical damage to the switch, chemicals will not remedy that

 

[Jeff Liebermann]

On Tue, 6 Aug 2013 19:49:09 +1000, "Phil Allison" <phil_a@tpg.com.au>
wrote:

Try some WD40 or similar spray lubricant - seriously bet it makes all the
switches work again.

That works, if you don't mind doing it again in about a month. The
residual oils left behind by WD-40 seems to turn to sticky gum. Try
it yourself. Spray some WD-40 on some glass and let it evaporate.
Check the oil after a few weeks of exposure to air. I used some
microscope slides with various contact cleaners. Only WD-40 became
sticky. Note that the "electrical contact cleaner" term was removed
from the WD-40 can at some times in the 1970's. The company also
introduced a product designed specifically for contact cleaning, which
contains NO oils:
<http://www.wd40specialist.com/products/contact-cleaner/>
If you want to break loose frozen controls, I have no problem using
WD-40. However, for contact cleaner, I use something else.

--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

 

[Kalyan Ram]

://www.web-design-hyderabad.in/seo-course-in-neredmet/


Contact for advisor : +91 9177522892

Web Design Hyderabad has a great demand and much more competition, But many of companies are not able to provide good service for customers, The problem might be because of design quality, not providing dynamic works like contact form or may be client expecting more work with very low cost.

To work with Web Design in Hyderabad, A designer should more honest with the client, you have to be explain the work of cost exactly, If not a designer will be struggled one day with client, Every one knows a designer can do any work but it takes time right, We have to cost as per our time

web design companies in hyderabad

Web design history

The Hypertext concept was invented by Ted Nelson in 60s, however it was used only for some decades after. During 1992 to 1994 other developers started adding up their own bits of HTML codes. HTML 1 tags and the HTML 2 born. As internet faster now the Web designers are putting more HTML capabilities. In 1995 more HTML tags have appeared and HTMl 3 was born. Now designers have an lot of option to use HTML B tables and style sheets and many more. They also have animated images, and Flash also introduced. It changed the whole landscape of web design from static to dynamic.

The first web site published in the World Wide Web history at sometime in August of 1981. It was some 30 years ago, however the Internet born in the sixties. It wasn’t fast as today. However it was capable in transferring information from one computer to another. Tim Berners was the first person who invented the World Wide Web. Tim Berners is British computer scientist. The First website launched in year 1990. on December 25 1990 with the help of Robert Cailliau and young student at CERN, Tim Berners implemented first successful communication between a Hypertext Transfer Protocol (HTTP) patron and server via Internet.

 

[Phil Allison]

"Jeff Liebermann= IDIOT "

"Phil Allison":

Try some WD40 or similar spray lubricant - seriously bet it makes all the
switches work again.

That works, if you don't mind doing it again in about a month.

** Wrong.

The residual oils left behind by WD-40 seems to turn to sticky gum.

** Yawnnnn...


..... Phil

 

[Phil Allison]

"dave"

Phil Allison wrote:
"Jens Herrmann"
Phil Allison wrote:

** There is no sign of residue on the switches in the pic.
So you used an evaporative contact spray like Freon or IPA.

Yes evaporative, but I had to open the switches to apply it.

** Silly, risky thing to do.

WD40 works in seconds with no disassembly.


WD40 is known to delaminate pc boards.

** ROTFL !!

It kills cockroaches too.


..... Phil

 

[Phil Allison]

"dave"

Phil Allison wrote:
"Rheilly Phoull"

How does the WD40 go for pots ?

** If a squirt of WD40 does not restore good operation - nothing else
will.

But be very careful with linear faders as it can dissolve the grease that
gives them a nice feel - if possible, open them up and clean the track
and
wipers with a rag and small brush dipped in WD40.

I have always thought it was short term and destructive.

** Nonsense.


DeOxit Red is what I use for rotary pots.

** I have a small ( 75ml) can of Caig "DeOxit D100" in the workshop -
bought it a few years ago for a price about 10 times that of WD40.

Dammed if I can find a single job it is any good for.

It has almost no penetrating ability and is a poor grease solvent.

WOFTAM.



.... Phil

 

[Phil Allison]

"Geoff"

"Phil Allison"

** I have a small ( 75ml) can of Caig "DeOxit D100" in the
workshop - bought it a few years ago for a price about 10
times that of WD40.

Dammed if I can find a single job it is any good for.

It has almost no penetrating ability and is a poor grease
solvent.

WOFTAM.


What about CRC 5-56,

** You tell me - sunshine

Almost 40 years ago, I used CRC 2-26 for the same jobs as WD40.



..... Phil

 

[Geoff]

"Phil Allison" <phil_a@tpg.com.au> wrote in
news:b6e66mFd1aoU1@mid.individual.net:

** I have a small ( 75ml) can of Caig "DeOxit D100" in the
workshop - bought it a few years ago for a price about 10
times that of WD40.

Dammed if I can find a single job it is any good for.

It has almost no penetrating ability and is a poor grease
solvent.

WOFTAM.



... Phil

What about CRC 5-56, how dya reckon it compares with WD-40?

 

[dave]

On 08/06/2013 11:01 PM, Phil Allison wrote:

"dave"
Phil Allison wrote:
"Rheilly Phoull"

How does the WD40 go for pots ?

** If a squirt of WD40 does not restore good operation - nothing else
will.

But be very careful with linear faders as it can dissolve the grease that
gives them a nice feel - if possible, open them up and clean the track
and
wipers with a rag and small brush dipped in WD40.

I have always thought it was short term and destructive.

** Nonsense.


DeOxit Red is what I use for rotary pots.

** I have a small ( 75ml) can of Caig "DeOxit D100" in the workshop -
bought it a few years ago for a price about 10 times that of WD40.

Dammed if I can find a single job it is any good for.

It has almost no penetrating ability and is a poor grease solvent.

D100 has no solvents. That is why you can't use it on your greasy

electronics.

http://store.caig.com/s.nl/it.A/id.1605/.f?sc=2&category=188