Digest for sci.electronics.repair@googlegroups.com - 15 updates in 5 topics

legg <legg@nospam.magma.ca>: Nov 08 12:10PM -0500

On Mon, 07 Nov 2022 23:22:26 +0000, Cursitor Doom <cd@notformail.com>
wrote:
 
 
>This kind of fault would be so much easier to detect if we had IR
>glasses to view the suspect areas with. Someone really needs to invent
>those.
 
You should be able to track a short this close to the
AC input with a multimeter on diode test mode.
 
brodge rec,
inverter fets
bulk caps
 
to start.
 
RL
three_jeeps <jjhudak@gmail.com>: Nov 08 10:36AM -0800

On Tuesday, November 8, 2022 at 12:09:23 PM UTC-5, legg wrote:
> bulk caps
 
> to start.
 
> RL
 
yes, and actually, tracking down the short on the downstream sections (modules) should not be that difficult either, using the same approach. After all the faulty component is SHORTED which should be easy to find. Yea, it is a PITA to check every single component (sort of the brute force way to check), but judicious studying of the schematic and identifying appropriate points to isolate and subsequently test can prune away a number of branches in the tree fairly quickly so as to speak.
 
Maybe bounce over to the tek google groups and ask if there are any common component failures that should be targeted first?
Otherwise, enjoy getting intimate with the guts of your scope....
Cursitor Doom <cd@notformail.com>: Nov 09 12:27PM

>bulk caps
 
>to start.
 
>RL
 
Turns out those early items in the power chain are fine, so I'm moving
on down the line to the less obvious items. The service manual has a
list of chief suspects to look at first, so hopefully that should
prove invaluable.
Cursitor Doom <cd@notformail.com>: Nov 09 12:28PM

On Tue, 8 Nov 2022 10:36:41 -0800 (PST), three_jeeps
 
>yes, and actually, tracking down the short on the downstream sections (modules) should not be that difficult either, using the same approach. After all the faulty component is SHORTED which should be easy to find. Yea, it is a PITA to check every single component (sort of the brute force way to check), but judicious studying of the schematic and identifying appropriate points to isolate and subsequently test can prune away a number of branches in the tree fairly quickly so as to speak.
 
>Maybe bounce over to the tek google groups and ask if there are any common component failures that should be targeted first?
>Otherwise, enjoy getting intimate with the guts of your scope....
 
Yup. Totally agree. I'm doing just that now.....
"Commander Kinsey" <CK1@nospam.com>: Nov 09 12:12AM


>> And Amish with refridgeration? That would be against their rules surely?
 
> Not hardly. What the Amish discourage is direct connections to the outside.
 
I thought it was any machinery. As in a combine harvester, a car, etc. Refridgeration is machinery.
 
> Keep in mind that Amish tend to be farmers, and tend to do a lot of dairy. So, in order to sell their product, they must comply with safety rules applicable to all farm products. They will use on-site generators for power, Absorption chillers (propane-fired) for cooling, and stationary engines to run fans and other devices via belts or pulleys.
 
So they go against their own customs to please the morons in power?
 
> https://amishamerica.com/do-amish-use-electricity/ Some of their farms are incredibly sophisticated in terms of energy use, between turbines, solar panels, even, in some cases, hydropower.
 
> Note also: Amish may use a (Cell) Phone, but may not dial one. And they may ride in a IC vehicle, but may not drive one.
 
That's illogical and sounds like cheating, like a Jew I know who sets timers for Sunday so he doesn't have to go to the trouble and energy of pushing that really heavy lightswitch.
 
So this refridgeration is ok as long as they hire a non-Amish bloke to press the power button? I'd love to have that job....
rbowman <bowman@montana.com>: Nov 09 03:48AM

On Wed, 09 Nov 2022 00:12:08 -0000, Commander Kinsey wrote:
 
>> outside.
 
> I thought it was any machinery. As in a combine harvester, a car, etc.
> Refridgeration is machinery.
 
Like they say, it's complicated. There isn't an Amish pope so each colony
has their own rules. One Indiana colony split over whether rubber tires on
a buggy were the work of the Devil.
 
I loaded furniture at a plant that was was staffed, if not owned, by
Amish. The machinery was modern but when I had to go to another warehouse
the guy loading the truck wouldn't ride over, but galloped across the
fields to meet me there.
 
Besides furniture, quite a few mid-west RV factories employ Amish.
 
https://amishamerica.com/why-are-amish-building-rvs/
 
It's disconcerting to see a guy in the traditional clothing and beard
smoking a cigarette and drinking a can of Coke or a bottle of beer for
that matter. In many ways they're a lot more liberal than some of the
tight-assed Protestant sects derived from Calvinism.
Peeler <trolltrap@valid.invalid>: Nov 09 10:43AM +0100

On 9 Nov 2022 03:48:52 GMT, lowbrowwoman, the endlessly driveling,
troll-feeding, senile idiot, blabbered again:
 
 
> Like they say, it's complicated. There isn't an Amish pope so each colony
 
Is it now about the Amish, you weird endlessly gossiping and driveling
senile Trumptard?
 
--
More of the senile gossip's absolutely idiotic senile blather:
"I stopped for breakfast at a diner in Virginia when the state didn't do
DST. I remarked on the time difference and the crusty old waitress said
'We keep God's time in Virginia.'
 
I also lived in Ft. Wayne for a while."
 
MID: <t0tjfa$6r5$1@dont-email.me>
"Peter W." <peterwieck33@gmail.com>: Nov 09 03:50AM -0800

> That's illogical and sounds like cheating, like a Jew I know who sets timers for Sunday so he doesn't have to go to the trouble and energy of pushing that really heavy lightswitch.
 
> So this refridgeration is ok as long as they hire a non-Amish bloke to press the power button? I'd love to have that job....
 
You must be one very, very blissful person.
 
Peter Wieck
Melrose Park, PA
vjp2.at@at.BioStrategist.dot.dot.com: Nov 08 09:11PM

Is it reasonable to expect a smartphone builtin magnetometer to measure the
current in a wire by induction?
 
 
--
Vasos Panagiotopoulos panix.com/~vjp2/vasos.htm
---{Nothing herein constitutes advice. Everything fully disclaimed.}---
"Peter W." <peterwieck33@gmail.com>: Nov 09 03:47AM -0800


> --
> Vasos Panagiotopoulos panix.com/~vjp2/vasos.htm
> ---{Nothing herein constitutes advice. Everything fully disclaimed.}---
 
Um.... No.
 
As you have carefully not given us any sort of parameters as in what kind of wire, what kind of current, any distances involved and much more (less).
 
Peter Wieck
Melrose Park, PA
Bob F <bobnospam@gmail.com>: Nov 08 07:03PM -0800

On 11/8/2022 3:30 AM, Peter W. wrote:
 
> https://www.ebay.com/itm/363537162096
 
> Peter Wieck
> Melrose Park, PA
 
I found the service manual for the BD-P3600
 
https://elektrotanya.com/cgi-bin/download2.cgi?dk=jvlafopokc3doxjn9arlkq26fl155ebgeylnz7pwatf5juoa&fid=205786&file=samsung_bd-p3600_sm.pdf
 
I can not find any reference in it to the VR 1,2,3 adjustments.
 
Would there be a separate manual for the internal drive? I find no
reference to it in this one.
 
There are some "deck adjustments" in the manual (page 4-25 to 4-27)
which are accomplished by entering numbers at certain time using the
remote control. They only seem to make a bong-bong noise when entered
soon after powering up, and do not display what the manual says they will.
 
The laser assembly seems to be a BDP5G-MAIN Rev 2-3.1 . I cannot so far
find any service info on that to suggest waht the VR1,2,3 adjustments are.
"Peter W." <peterwieck33@gmail.com>: Nov 09 03:45AM -0800

> The laser assembly seems to be a BDP5G-MAIN Rev 2-3.1 . I cannot so far
> find any service info on that to suggest waht the VR1,2,3 adjustments are.
 
That is the one pictured, yes. I expect that you will have to find a service manual for that specific device - or, as I am fond of suggesting, if the alternative is landfill, a little bit of careful experimenting is in order.
 
NOTE: You are adjusting the DVD (red) laser!
 
https://www.techwalla.com/articles/how-to-adjust-the-laser-in-your-dvd-player
 
When the alternative is landfill, extraordinary measures are acceptable.
 
Peter Wieck
Melrose Park, PA
Chuck <chuck23@dejanews.net>: Nov 08 11:13AM -0600

On Mon, 7 Nov 2022 09:56:29 -0800 (PST), kajzerek90 <kajzerek90@wp.pl>
wrote:
 
>Hi, I am from Poland. I am looking for a realistic sta 740 amplifier diagram. Please contact me.
 
Here you go.
https://www.hifiengine.com/manual_library/realistic/sta-720.shtml
"Peter W." <peterwieck33@gmail.com>: Nov 08 09:47AM -0800

> https://www.hifiengine.com/manual_library/realistic/sta-720.shtml
 
That would be the 720. A substantially different animal.
 
Peter Wieck
Melrose Park, PA
three_jeeps <jjhudak@gmail.com>: Nov 08 10:54AM -0800

On Monday, November 7, 2022 at 12:56:32 PM UTC-5, kajzerek90 wrote:
> Hi, I am from Poland. I am looking for a realistic sta 740 amplifier diagram. Please contact me.
My googlefu did not turn up anything free, however:
https://www.servicemanuals.net/en/REALISTIC-STA740-Service-Manual
and the always reputable Sams
https://www.samswebsite.com/en/photofact/search/index/page/24/brand/REALISTIC
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