[TechAssist] Re: Best way to clean a head.
- From: Dennis Viereck <wa6ati@xxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Sat, 24 Nov 2001 17:22:45 -0800
I Instruct my techs not to use toothbrushes with chemicals like MEK.
Inexpensive acid brushes or wooden paint brushes work excellent in these type
of chemicals because the brush or handle will not dissolve and contaminate
the board with the plastic from toothbrushes.
For the paint brushes I use up to 1 inch wide with the bristles cut to about
3/4 ~ 1 inch in length. These last for years. I loose them before they wear
out.
Watch out for MEK it is a outstanding solvent for flux but us it in a
ventilated room. It is not a chemical you want to used to smelling.
Dennis Viereck
gulftech@xxxxxxxx wrote:
> I use MEK to clean boards before and after a repair. It works really
> great and MUCH cheaper than flux remover. (About $5.00 a quart at Ace
> Hardware.) Just have to get used to the strong smell! I use a
> toothbrush to apply--have to change out every few months. It works on
> the plastic and gives me a bad taste when I brush my teeth. (Just
> kidding...)
>
> I must respectfully disagree on using Q-Tips on video heads. IMO, it's
> fine for the rest of the tape path, but not for the video heads. I use
> denatured alcohol (also from Ace) for the tape path. MEK might be great,
> especially for the pinch roller, but since my can of MEK is contaminated
> from board cleanings, I won't even try it. Have used Acetone as a last
> resort a few times, but am fearful of damage to the head core and
> windings.
>
> Ken Smith
> Gulf Technical Services
> 3034 Gulf Breeze Parkway
> Gulf Breeze, FL 32561
> 850-934-8324 (Voice) 850-932-0819 (Fax)
>
> ----------------
>
> On Sat, 24 Nov 2001 14:17:32 -0800 "Richard Golden d.b.a. Golden Video
> Repair Center" <reldong@xxxxxxxxx> writes:
> >
> > I've used mek (methyl ethyl ketone) and qtips for 15 yrs
> > 3 shops over I,ooo 's of vcrs tried everything else first
> > works best and I quart last a long time. buy from home depo etc. had
> > a
> > customer who was a chemist find it for me. Will EAT plastic!!! can
> > use on
> > all heads audio ,
> > video tape guides pinch rollers pc boards but no soft
> > Plastic!!cleans rubber
> > ok
> > Richard
> >
> > ---- Original Message -----
> > From: "Tel-Tek Electronics" <teltek@xxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Friday, November 23, 2001 8:33 AM
> > Subject: [TechAssist] Re: Best way to clean a head.
> >
> >
> > >
> > > Hey guys........
> > > I use an Ultrasonic Denture Cleaner.
> > > Use Isopropyl alcohol in the unit.
> > > Unit has an airtight lid on it so the alcohol doesn't disperse
> > between
> > uses.
> > > Works wonders on any parts that need cleaning.
> > >
> > > -Ed-
> > >
> > > teltek@xxxxxxxxxxx
> > > TEL-TEK ELECTRONICS.
> > >
> > >
> > >
> > >
> > >
> > > ----- Original Message -----
> > > From: "Leonard G. Caillouet" <lcaillo@xxxxxxxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Sent: Friday, November 23, 2001 11:03 AM
> > > Subject: [TechAssist] Re: Best way to clean a head.
> > >
> > >
> > > >
> > > > I also use denatured alcolhol but use strips of synthetic
> > chamois ( it
> > > holds
> > > > up better without giving up little bits and is smoother than
> > natural).
> > If
> > > > you fold it into several layers it will hold enough solvent to
> > get the
> > > > dirtiest heads clean and allows you to put a good deal of
> > pressure on
> > the
> > > > head drum. I run the head with a dummy cassette and rarely have
> > a head
> > > that
> > > > doesn't clean on the first try. You can throw these synthetic
> > chamois
> > > into
> > > > the washer several times before you replace them and the whole
> > thing
> > will
> > > > last years.
> > > >
> > > > Leon.
> > > >
> > > > Leonard G. Caillouet
> > > > Service Manager
> > > > Electronics World
> > > > Gainesville, FL
> > > > 352-332-5608
> > > > 352-332-5668 (fax)
> > > >
> > > > ----- Original Message -----
> > > > From: "Dennis Viereck" <wa6ati@xxxxxxxxxxxxxx>
> > > > To: <techassist@xxxxxxxxxxxxx>
> > > > Sent: Friday, November 23, 2001 12:20 AM
> > > > Subject: [TechAssist] Re: Best way to clean a head.
> > > >
> > > >
> > > > >
> > > > > I just use plain white printer paper and denatured alcohol.
> > cut the
> > > paper
> > > > in 1
> > > > > inch wide strips 4 inches long. Soak one end of the paper in
> > the
> > alcohol
> > > > and place
> > > > > it against the video hear drum with my finger on the other
> > side.
> > Rotate
> > > > the the
> > > > > drum with a little pressure but no movement of my finger. I
> > inspect
> > the
> > > > cleaning
> > > > > with a machinist microscope and make sure the head is clean
> > and no
> > > debris
> > > > left
> > > > > over. I have used this method since the VBT200 days. Works
> > great! As
> > > long
> > > > as you
> > > > > dry it with a slight puff of compressed air before tossing a
> > tape in
> > the
> > > > machine.
> > > > >
> > > > > Dennis Viereck
> > > > >
> > > > > Ralph Dorsey wrote:
> > > > >
> > > > > > a small piece of chamois cloth works great also (and it's
> > re-usable)
> > > > > >
> > > > > > Ray Lufkin wrote:
> > > > > >
> > > > > > > Best way is to use a business card soaked in acetone. Hold
> > it up
> > > > against the
> > > > > > > head and turn the head the standard direction (cc). That
> > will
> > > usually
> > > > clean
> > > > > > > the most stubborn clog.
> > > > > > >
> > > > > > > u
> > > > > > > ----- Original Message -----
> > > > > > > From: "Phillip R. Hull" <phil245@xxxxxxxxxxxxx>
> > > > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > > > Sent: Tuesday, November 20, 2001 4:44 PM
> > > > > > > Subject: [TechAssist] Re: Question reguarding Panasonic
> > VCRs
> > > > > > >
> > > > > > > >
> > > > > > > > A worn head drum will show a full picture with a small
> > area
> > thats
> > > > > > > distorted.
> > > > > > > > Its caused because the tape no longer touches the head
> > drum,
> > the
> > > > full
> > > > > > > width
> > > > > > > > of the tape. This is caused by a air gap between the
> > tape and
> > the
> > > > head.
> > > > > > > >
> > > > > > > > Phillip R Hull
> > > > > > > > phil245@xxxxxxxxxxxxx
> > > > > > > > ----- Original Message -----
> > > > > > > > From: "George Winters" <littletiger67@xxxxxxxxx>
> > > > > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > > > > Sent: Tuesday, November 20, 2001 3:59 PM
> > > > > > > > Subject: [TechAssist] Re: Question reguarding Panasonic
> > VCRs
> > > > > > > >
> > > > > > > >
> > > > > > > > >
> > > > > > > > > Howdy Wally,
> > > > > > > > > If the heads are bad there won't be any video showing
> > on the
> > > > screen, if
> > > > > > > > you have even and inch of video showing on the screen
> > the heads
> > > are
> > > > good,
> > > > > > > > clean them again. I've had some vcrs unit in my shop
> > that would
> > > have
> > > > to be
> > > > > > > > cleaned 6 times to clean the heads out. Hope this help
> > you.
> > > > > > > > > George Winters Jr.
> > > > > > > > > GLW CUSTOM ELECTRONICS
> > > > > > > > > TN.
> > > > > > > > > Jeff Dougherty <jeff@xxxxxxxxxxxxxxxxxx> wrote:
> > > > > > > > > Wally,
> > > > > > > > > If these things have the spongy self cleaners..this is
> > more
> > than
> > > > likely
> > > > > > > > the
> > > > > > > > > cause. What a sales gimmick!
> > > > > > > > >
> > > > > > > > >
> > > > > > > > > Jeff
> > > > > > > > > mailto:Jeff@xxxxxxxxxxxxxxxxxx www.9-11-2001tragedy.com
> > > > > > > > > FAX 1-413-280-0677
> > > > > > > > > Intrepid Video & Electronics
> > > > > > > > > Harrisburg, PA 17111
> > > > > > > > > 717-909-8844
> > > > > > > > > www.intrepid-video.com www.tech-repair.net
> > www.thetoolcaddy.com
> > > > > > > > > ----- Original Message -----
> > > > > > > > > From: "Wally Heise"
> > > > > > > > > To:
> > > > > > > > > Sent: Tuesday, November 20, 2001 1:39 AM
> > > > > > > > > Subject: [TechAssist] Question reguarding Panasonic
> > VCRs
> > > > > > > > >
> > > > > > > > >
> > > > > > > > > >
> > > > > > > > > > I now have about 4 Panasonic vcrs which all have what
> > appears
> > > to
> > > > be
> > > > > > > bad
> > > > > > > > > > video heads when you play. All of these vcrs are 1-4
> > years
> > old
> > > > and
> > > > > > > > > > different model numbers. I don't have a video head
> > tester to
> > > > check the
> > > > > > > > > > heads yet, (have not had a big need for one). I am
> > wondering
> > > if
> > > > others
> > > > > > > > > > have seen a high failure rate with Panasonic video
> > heads? Or
> > > is
> > > > there
> > > > > > > > > > something else I'm missing? Is there an easy method
> > of
> > > > determining if
> > > > > > > a
> > > > > > > > > > video head is defective, without the tester?
> > Needless to say
> > I
> > > > have
> > > > > > > > > > cleaned and cleaned the heads to no avail.
> > > > > > > > > >
> > > > > > > > > > Any help is greatly appreciated.
> > > > > > > > > >
> > > > > > > > > > Thank you
> > > > > > > > > > Wally Heise
> > > > > > > > > > South Isle Repair
> > > > > > > > > > =================================
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