[TechAssist] Re: Emerson Combo EWC1901
- From: "J Silverman" <greentron@xxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 1 Jul 2003 14:47:21 -0400
Input is pin 9. Supposed to sit at 2.5 volts, so I guess higher and lower
makes it run one direction or the other. If that 2.5 volts is from a square
wave the they must use duty cycle or some other coding for the logic. Have
the same model in for service. Display says eject no matter where I put the
mechanism but the motor does not run and the power shuts off. Already
changed the mode switch and checked the mechanism. If I thread it up all the
way and plug it in the loading motor runs back and forth just a little and
the drum and capstan run. Power stays on just long enough for me to see the
crt OSD so I know power and deflection are OK. Have ordered the loading
motor/cylinder driver IC from Funai as next step. Philips and Hitachi may be
using the same stuff so you might try one of their distributors if you dont
want to order from Funai.
Jerry Silverman
Greentron Inc
4 Newland Ave
Greenville SC 29609
864 232 3889
Fax 271 2080
mailto:greentron@xxxxxxx
----- Original Message -----
From: "Bob@Bobs tv" <woodman1@xxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, July 01, 2003 1:58 PM
Subject: [TechAssist] Re: Emerson Combo EWC1901
> Peggs,
> I had a similar problem on a funai 9" few months ago.. Found a bad
> cap 47/16 cap.. Sorry don't remember the location except it was on primary
> side of the power supply area...near heat sink..
> Hope this will help..
> Bob,
>
> Bobs TV Worcester, ma
>
> woodman1@xxxxxxxx
>
> Main 508-853-1482
> Fax 508-853-1480
> ----- Original Message -----
> From: "peggs" <peggs@xxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Tuesday, July 01, 2003 1:57 PM
> Subject: [TechAssist] Emerson Combo EWC1901
>
>
> > This thing is made by Funai,and it looks like I must get parts
> > from them as well.
> > Powers Up, then Kills Power a few seconds later.
> > The Loading Motor runs in one Direction(Load) only.
> > The voltage on the Motor never changes Polarity(Unload).
> > I cleaned the Mode switch.................... 2 times.
> > I can travel the Mechanics in and out by hand just fine,so
> > nothing is in a bind.
> >
> > My Second thought was,LED/Prism/Sensors, but if they were
> > bad I could at least get it to Eject.The Motor Polarity never changes
> > to the Unload/Eject Polarity.
> > Plus the Motor never stops being 'driven',it loads all the way,Voltage
> > Drops to 0v,then tries to drive in the same direction again(Load),then
> > Kills Power.
> >
> > This Motor is Driven by a SM IC, BD6655FP.
> > Can't find a Pin-out,so I don't know which Pins are Input(drive) from
> > Micro.
> >
> > Anyone have a Service Manual on this Emerson ???
> > WinStips says it's similar to a CCB194(Philips/Mag)
> >
> > Peggs
> > Peggs' Electronics
> > 1519 West 2nd Street
> > Owensboro,KY 42301
> > 270-926-4968
> > fax 270-686-7399
> > peggs@xxxxxxxxxxxxx
> >
> >
>
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