[TechAssist] Re: Emerson TV/VCR EWC1901 TV shuts off after 10 seconds
- From: "J Silverman" <greentron@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sat, 22 Jan 2005 13:14:21 -0500
Are we talking about end sensors or reel sensors? The reel sensor isnt going
to make the TV shut down just sitting there! A defective end sensor could do
that with no tape in the unit. The micro is being told that a sensor is
blocked with the basket in the up position. Some of those models had the end
sensors standing up on a stalk of several pieces of printed circuit material
soldered together and there was a cracked trace where two pieces join, so
the unit tried to take the basket in without a tape and then the power would
shut off.
Jerry Silverman
Greentron Inc
4 Newland Ave
Greenville SC 29609
Fax/Phone 864 232 3889
mail to: greentron@xxxxxxx
----- Original Message -----
From: "Jim Shupe" <jim@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Saturday, January 22, 2005 8:06 AM
Subject: [TechAssist] Re: Emerson TV/VCR EWC1901 TV shuts off after 10
seconds
> John..
>
> If I understand your test results, it would seem
> that the takeup reel sensor is bad...doesn't appear to
> pull low enough.If the deck has a supply reel sensor,
> I'd swap them if possible and see if your symptoms
> change. If that's not do-able, then I'd even suggest
> manually "pulsing" that sensor to see if that cures
> the problem BEFORE searching for a replacement.
> If you short across the sensor at regular intervals
> while the machine is running you will simulate a
> properly functioning sensor. If the problem goes away,
> you know the sensor is bad(or at least something is
> wrong in the light path).
> Sorry, I don't have a part #, as I usually scrounge
> this type of part from a deceased donor.
>
> Jim Shupe, CET
> Lloyd's TV
> Yucca Valley, CA
>
> --- Bill Grabowski <bgrabowski@xxxxxxxxx> wrote:
>
> > I'd clean or change the mode switch. I use a drop of
> > lighter fluid, it
> > cleans and lubricates well. Evaporates quickly.
> >
> > Bill Grabowski
> > Triangle Appliance
> > Kenosha,WI 53142
> >
> > John H Smit wrote:
> >
> > > Hi Jim
> > > Thank you for your input on this,but the prism
> > looks good also that
> > > extension to the other sensor.
> > >
> > > When I just plug the the power cord in the outlet
> > I get on the supply real
> > > sensor a 0.154V reading
> > > when I cover up the center LED the reading goes
> > high to 4.45V
> > >
> > > On the take up real sensor it shows 3.50V and the
> > LED covered it goes to
> > > 4.66V
> > > You think the sensor is defective
> > > If so do you have the part # on these items center
> > LED, and the endsensors
> > > please
> > >
> > > The center LED is putting out a bright infra red
> > light.
> > > Thank you in advance
> > > And also I like to thank everybody else who
> > responded on this.
> > >
> > > John H Smit
> > > Smit's TV Service
> > > Box10
> > > Gunnison Utah 84634
> > > 800-355-4948 Phone&Fax
> > > 435-528-7955 Phone&Fax
> > > smijoh74@xxxxxxxxxxxx
> > > ----- Original Message -----
> > > From: "Jim Shupe" <jim@xxxxxxxxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Sent: Friday, January 21, 2005 6:52 AM
> > > Subject: [TechAssist] Re: Emerson TV/VCR EWC1901
> > TV shuts off after 10
> > > seconds
> > >
> > >
> > >
> > >>Sounds like the little extension on the prism is
> > >>broken off...10 seconds is, more or less, about
> > the
> > >>right amount of time for the reel rotation circuit
> > to
> > >>respond. That extension routes the IR down to the
> > >>photo-interrupter to sense takeup rotation. I
> > think
> > >>the machine would act much differently if the
> > whole
> > >>thing was broken.
> > >>
> > >> Jim Shupe, CET
> > >> Lloyd's TV
> > >> Yucca Valley, CA
> > >>
> > >>--- John H Smit <SMIJOH74@xxxxxxxxxxxx> wrote:
> > >>
> > >>
> > >>>Hello to all
> > >>>I have this TV/VCR Emerson TV/VCR, and the
> > customer
> > >>>tore a stuck tape out of
> > >>>the unit.
> > >>>I have repaired the basket and aligned the VCR
> > part.
> > >>>But when I turn the set on it will show a good
> > >>>picture, and sound but it
> > >>>will click off in about 10 seconds.
> > >>>And it shows eject on the screen.
> > >>>I cleaned and lubed the modeswitch.
> > >>>I suspects the 5 or 12 volts missing at the front
> > >>>buttons,but do not have
> > >>>the S/M available.
> > >>>I hope someone could give me a hint on this one.
> > >>>Thank you in advance
> > >>>John H Smit
> > >>>Smit's TV Service
> > >>>Box10
> > >>>Gunnison Utah 84634
> > >>>800-355-4948 Phone&Fax
> > >>>435-528-7955 Phone&Fax
> > >>>smijoh74@xxxxxxxxxxxx
> > >>>
> > >>>
> > >>>
> > >>
> >
>
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> > --
> > *****************************
> > Bill Grabowski
> > Triangle Appliance
> > Kenosha,Wi 53142
> > 262-694-6500
> > 262-694-6523 fax
> > bgrabowski@xxxxxxxxx
> > *****************************
> >
> >
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