Digest for sci.electronics.repair@googlegroups.com - 9 updates in 5 topics

999bga@gmail.com: Feb 07 07:12AM -0800

Was working perfectly fine for many years. 5.1 setup with Paradigm Atom speakers and Sony sub.
Connected to TV via SPDIF cable.
One day sound "popped" and now LED shows volume numbers go UP and DOWN(knob or remote), but sound level stays the same.
Sound is distorted and when plugged in headphones, one channel only.
Tested all transistors on the AMP board, - nothing shorted or open. Tested all diodes. Caps seem fine.
Same tests with main board.
All voltages are seems there.
The rest of the boards tested the same also...
 
 
Any help is highly appreciated.
jaugustine@verizon.net: Feb 07 08:42AM -0500

On Mon, 3 Feb 2020 07:56:10 -0800 (PST), Ken Layton <KLayton888@aol.com>
wrote:
 
 
>> Thank You in advance, John
 
>Back in 1995, I was able to order the manual from their parts department. It is Uniden part number SMBC855XLT (also known as part number 12A90-3AT200). It is 54 pages long, but the copy I purchased back then was missing pages 19 and 20. I contacted Uniden and they copied the missing pages and sent them to me. Back then the manual cost $16.00 plus $4.50 shipping from Uniden's parts department.
 
>If you can't get the manual from Uniden any longer, I could photocopy the manual, but it's got about ten 11 x 17 full sized schematics. It's a very comprehensive manual which covers everything and even has voltage measurements.
 
Hi Ken,
 
I am only interested in the schematic/s.
 
I can give you my real email address here if you can scan the schematic
into an image file (.BMP, .JPG, or other) and send it to me as an attachment.
Otherwise, you can mail a photocopy to me after I give you my address
in an email to you.
 
I will mail you cash. Let me know how much you want in the email.
 
Before I indicate my real email address, please let me know
if this is ok with you.
 
Thank You, John
OtterGuy <OtterGuy@OtterGuy-aioe.com>: Feb 06 03:20PM -0800

What is the best way to protect bare steel metal surface (IT RUSTS
EASILY) for use in woodworking ? It is on a band saw.
 
Bee's Wax ?
 
Suggestions please.
Tom Biasi <tombiasi@optonline.net>: Feb 06 06:44PM -0500

On 2/6/2020 6:20 PM, OtterGuy wrote:
> EASILY) for use in woodworking ?   It is on a band saw.
 
> Bee's Wax ?
 
> Suggestions please.
 
https://www.travers.com/prevent-rust-631/p/81-006-001/?msclkid=32b87b87729914b9abc825bbd6137d47&utm_source=bing&utm_medium=cpc&utm_campaign=BPA%20-%20Brands%20-%20Tooling%20Components%20and%20Workholding&utm_term=4584826052967624&utm_content=BPA%20Brand%20-%20Tooling%20Components%20and%20Workholding%7C10-20%7CC%3A45
"pfjw@aol.com" <peterwieck33@gmail.com>: Feb 07 04:10AM -0800

On Thursday, February 6, 2020 at 6:20:56 PM UTC-5, OtterGuy wrote:
> EASILY) for use in woodworking ? It is on a band saw.
 
> Bee's Wax ?
 
> Suggestions please.
 
Tom has an excellent suggestion. However, when I worked as a machinist, we used a dry silicon spray for that purpose.
 
https://www.zoro.com/lps-dry-film-silicone-lubricant-aerosol-01616/i/G1377537/feature-product?gclid=Cj0KCQiAsvTxBRDkARIsAH4W_j_ngWbb5XCSIEzieOynkomCz-DfRLRvNmu4D0kKA_JvSgyD2OS8nXoaArKVEALw_wcB
 
We needed a material that did not attract or entrap dust.
 
Peter Wieck
Melrose Park, PA
Bob Engelhardt <BobEngelhardt@comcast.net>: Feb 07 07:33AM -0500

> Tom has an excellent suggestion. However, when I worked as a machinist, we used a dry silicon spray for that purpose.
> ...
 
One does NOT want to get silicone on any wood that is going to be
finished (stained, varnished, oiled).
 
A classic approach is paste floor wax, e.g., Butcher's.
 
Try a woodworking newsgroup.
"pfjw@aol.com" <peterwieck33@gmail.com>: Feb 07 04:53AM -0800

On Friday, February 7, 2020 at 7:34:28 AM UTC-5, Bob Engelhardt wrote:
 
> finished (stained, varnished, oiled).
 
> A classic approach is paste floor wax, e.g., Butcher's.
 
> Try a woodworking newsgroup.
 
 
"Sheet metal surfaces"
 
Not wood. Which does not rust in any case.
 
Peter Wieck
Melrose Park, PA
Phil Allison <pallison49@gmail.com>: Feb 06 09:29PM -0800

Gareth Magennis wrote:
 
--------------------------
> http://www.cosmo-ic.com/object/products/KAQV216.pdf
 
> The switching is done via the switched speaker jack.
> No speaker lead, no Screen Grid HT.
 
** Hmmmmm........
 
Wot if a power tube develops a screen to cathode short ?
 
Bye-bye nice little SS switch ?
 
Tube amp output stages are regularly subject to some appalling accidental abuse plus some disturbing deliberate ones.
 
Damage needs to be limited to fuses and maybe the odd resistor.
 
Some designers get too cute.
 
 
.... Phil
germanrestrepo57@gmail.com: Feb 06 11:15AM -0800

Thank you very much for sharing the solution to this problem. It works immediately, but then V-Tunner disappear from the screen, the rest of functions keep normally working.
Any additional suggestion?
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