[TechAssist] Re: Factory security requirements for service facilities
- From: peter kowalik <pe.kow@xxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Thu, 14 Mar 2002 22:22:31 -0500
Damon the ground strap is not to protect you from an electrical shock. The point
has been missed by many-----you ground yourself to protect semi-conductors which
are static sensitive....isolation transformers are used to isolate the device
you are working on from the outside world....should one have a problem with a
power supply or the RF input on a hot chassis they would not wish to compound it
by trying to fire the set up on an un-isolated line causing a rather rapid
snap..a blown fuse ...shorted rectifiers...punched reg IC's...maybe even blown
print....the 1 meg ohm resistor in the ground strap would be of little benefit
to an IC particularly in colder climate areas where to remain comfortable there
is a need for a certain degree of heat which usually is accompanied by very dry
air.....some of the suggestions made in the earliest replies were very simple
basic and workable....I try not to throw any stones ....I've made many mistakes
in 30 years of service....peter
J Silverman wrote:
> Just thick up your skin and enjoy the T/A.
> Jerry Silverman
> Greentron Inc
> 4 Newland Ave
> Greenville SC 29609
> 864 232 3889
> Fax 271 2080
> mailto:greentron@xxxxxxx
> ----- Original Message -----
> From: "mitchstv" <mitchstv@xxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, March 14, 2002 1:26 PM
> Subject: [TechAssist] Re: Factory security requirements for service
> facilities
>
> >
> > Ken:
> > Well haven't been called a Liar since grade school. Been called worse I
> > guess, didn't deserve those names either. Only been in this group two days
> > and its just pretty obvious most posts are from people who should maybe,
> be
> > doing some other line of work if Electronics is their work that is.
> > Sorry.
> > Best Regards
> > Mr. Rick L Mitchell
> > Mitch's Home Elec. Ser. Co.
> > 3935 south 20th
> > Lincoln, NE 68502
> > Mitchstv@xxxxxxxxxx
> > Original Message -----
> > From: <gulftech@xxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Thursday, March 14, 2002 9:54 AM
> > Subject: [TechAssist] Re: Factory security requirements for service
> > facilities
> >
> >
> > >
> > > Mitch,
> > >
> > > You missed the point Damon was making. Anyone in this business who can
> > > say he or she has never goofed up an gotten shocked is either a liar or
> > > just answers the phone at a service shop. IF one chooses to wear a
> > > ground strap, there MUST be a high-value resistor (usually 1 Meg)
> between
> > > the technician and earth ground.
> > >
> > >
> > > Ken Smith
> > > Gulf Technical Services
> > > 3034 Gulf Breeze Parkway
> > > Gulf Breeze, FL 32563
> > > 850-934-8324 (Voice) 850-932-0819 (Fax)
> > >
> > >
> > > On Thu, 14 Mar 2002 08:04:48 -0600 "mitchstv" <mitchstv@xxxxxxxxxx>
> > > writes:
> > > >
> > > > True Damon, but on the other hand if you don't know what a HOT
> > > > chassis is or
> > > > a isolation Transformer you should be working at McDonalds.
> > > >
> > > > Mitch
> > > > Mitchstv@xxxxxxxxxx
> > > >
> > > > ----- Original Message -----
> > > > From: "Damon" <DAMON101@xxxxxxxxxxxxxx>
> > > > To: <techassist@xxxxxxxxxxxxx>
> > > > Sent: Thursday, March 14, 2002 6:48 AM
> > > > Subject: [TechAssist] Re: Factory security requirements for service
> > > > facilities
> > > >
> > > >
> > > > >
> > > > > Yeah, my Citizen quartz watch is a great place to hook up to also,
> > > > but it
> > > > > doesn't have the 1 megohm resistor built in which will limit the
> > > > current
> > > > > passing thru your body if you contact a live set.
> > > > >
> > > > > Damon Brunger
> > > > > damon101@xxxxxxxxxxxxxx
> > > > > Telrad Electronic Services
> > > > > Ft Wayne, IN 46815
> > > > > ----- Original Message -----
> > > > > From: "mitchstv" <mitchstv@xxxxxxxxxx>
> > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > Sent: Wednesday, March 13, 2002 8:09 PM
> > > > > Subject: [TechAssist] Re: Factory security requirements for service
> > > > > facilities
> > > > >
> > > > >
> > > > > >
> > > > > > Not to mention hand lotion once in a while and forget the wrist
> > > > strap,
> > > > ive
> > > > > > used a clip lead to my Rolex for 22 years haven't blown anything
> > > > yet.
> > > > > > Mitch
> > > > > > Mitchstv@xxxxxxxxxx
> > > > > > ----- Original Message -----
> > > > > > From: "Damon" <DAMON101@xxxxxxxxxxxxxx>
> > > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > > Sent: Wednesday, March 13, 2002 5:59 PM
> > > > > > Subject: [TechAssist] Re: Factory security requirements for
> > > > service
> > > > > > facilities
> > > > > >
> > > > > >
> > > > > > >
> > > > > > > Don't worry about it, don't go spending $2000.00 to protect a
> > > > $3.00
> > > > > part.
> > > > > > > But use common sense: Wear cotton or cotton/polyester clothes,
> > > > they
> > > > > > generate
> > > > > > > very little static electricity compared to wool, silk, nylon
> > > > and
> > > > rayon.
> > > > > > > Don't rub your hair. Get a wood work bench, steer clear of all
> > > > steel,
> > > > > > you'll
> > > > > > > blow more chassis than you'll save. Get an isolation
> > > > transformer. If
> > > > you
> > > > > > can
> > > > > > > find one get a big 20-30 amp 1 to 1 transformer and run a
> > > > service line
> > > > > to
> > > > > > a
> > > > > > > multitap grounded strip that you can attach to the front of
> > > > your
> > > > > > workbench.
> > > > > > > Then run normal unisolated strip to the back of your bench for
> > > > TEST
> > > > > > > EQUIPMENT ONLY. Use orange plugs to identify either the
> > > > isolated or
> > > > > > > unisolated ones. Use a wrist strap only, or touch yourself to
> > > > the
> > > > tuner,
> > > > > > if
> > > > > > > you're at the same potential as the the part and the chassis,
> > > > electrons
> > > > > > will
> > > > > > > not flow, thus no damage.
> > > > > > >
> > > > > > > Don't itch your butt, don't wipe your nose, don't play with
> > > > styrofoam
> > > > > > cups,
> > > > > > > don't wear panties.
> > > > > > >
> > > > > > > Damon Brunger
> > > > > > > damon101@xxxxxxxxxxxxxx
> > > > > > > Telrad Electronic Services
> > > > > > > Ft Wayne, IN 46815
> > > > > > > ----- Original Message -----
> > > > > > > From: "Central Service" <centralserv@xxxxxxxxxxx>
> > > > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > > > Sent: Wednesday, March 13, 2002 4:02 PM
> > > > > > > Subject: [TechAssist] Factory security requirements for service
> > > > > facilities
> > > > > > >
> > > > > > >
> > > > > > > > Hi group!
> > > > > > > > I wonder if anyone of the authorized services of well known
> > > > brands
> > > > > like
> > > > > > > RCA, AIWA, SONY, JVC, PANASONIC or others, ever received some
> > > > advice
> > > > on
> > > > > > > security measures that should be used on service facilities
> > > > (not only
> > > > > work
> > > > > > > place).
> > > > > > > >
> > > > > > > > On service manuals you can find some of them but they are
> > > > hardly
> > > > ever
> > > > > > > used (even factory service facilities themselves don't have
> > > > nor use
> > > > > them)
> > > > > > > >
> > > > > > > > I'm talking about security measures that factory may once
> > > > have said
> > > > > > > should be used when replacing IC's, (specially LSI like CPU,
> > > > Jungles
> > > > or
> > > > > > > dedicated high speed IC's), servicing cameras, video, TV sets
> > > > etc,.
> > > > Also
> > > > > > > about spare parts handling and storage, dressing and work place
> > > > itself.
> > > > > > > >
> > > > > > > > Say for example: grounding requirements, special ESD
> > > > handling (not
> > > > > only
> > > > > > > discharging your hands), work place material, floor conductive
> > > > painting,
> > > > > > > storage cabinet grounding, X-ray radiation test after TV set
> > > > fix,
> > > > > exposed
> > > > > > > metal leakage grounding, etc.
> > > > > > > >
> > > > > > > > I would appreciate your comments. Please answer to my
> > > > e-mail with
> > > > > this
> > > > > > > "of the topic info".
> > > > > > > >
> > > > > > > > Emilio Fraga
> > > > > > > > CentralService
> > > > > > > > Electronics & TV service
> > > > > > > > (598 2) 929 1131
> > > > > > > > Mvd. Uruguay.
> > > > > > > >
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