[TechAssist] Re: Samsung K50UC chassis Model CT-5025
- From: Alvin Rose <arose@xxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Mon, 12 May 2003 21:19:21 -0700
Hi Al
I changed c950 and micro also voltage regulator but the turn on is still
very critical at full line voltage. will check 5 volts on micro and ripple on
input
Thanks to all of the techs who replied..your help is appreciated.
Alvin
al m wrote:
> Check your voltage on C950 with a scope and see how much ripple you have.
> Like Phillip said I've had lots of problems with C950 and the other caps in
> this circuit. If your 5v drops your Micro will shut the set off. I think you
> should have at least 159V Dc on C950. Watch it to see if it drops when it
> warms up.
> al marquardt
> ampm@xxxxxxx
>
> ----- Original Message -----
> From: "Phillip R. Hull" <phil245@xxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Monday, May 12, 2003 1:10 PM
> Subject: [TechAssist] Re: Samsung K50UC chassis Model CT-5025
>
> >
> > Are you sure its shutting down or turning off?? I have had bad micros in
> > these and also r412 changing value and C950 bad
> > Phillip R Hull STET
> > phil245@xxxxxxxxxxxxx
> > FAX 517--569-3075
> > ----- Original Message -----
> > From: "Alvin Rose" <arose@xxxxxxxxxxxxxxx>
> > To: <Techassist@xxxxxxxxxxxxx>
> > Sent: Monday, May 12, 2003 5:45 PM
> > Subject: [TechAssist] Samsung K50UC chassis Model CT-5025
> >
> >
> > >
> > > We have a Samsung K50UC chassis which is shutting down
> > > found defective C951 and c952 which was replaced..also
> > > replaced on off relay but set is still shutting down..
> > > set does not draw excess current from isolation supply.
> > > may come on and work intermittently
> > > When it shuts down red front led comes on but it has no timer
> > > defects.. any help appreciated.
> > > Alvin Rose
> > > Radio & TV Centre
> > >
> > >
> > >
> >
> ****************************************************************************
> > *
> > > The Tech Address Book:
> > > http://www.tech-assist.org/secure/tip/contact.html
> > > Add a Repair Tip Here, or Change/Remove your Email Address:
> > > http://www.tech-assist.org/secure/tip/main.html
> > > Lost Password:
> > > http://www.tech-assist.org and select "Lost your Login Info?".
> > > Email Archives:
> > > //www.freelists.org/archives/techassist/
> > >
> > >
> >
> >
> ****************************************************************************
> *
> > The Tech Address Book:
> > http://www.tech-assist.org/secure/tip/contact.html
> > Add a Repair Tip Here, or Change/Remove your Email Address:
> > http://www.tech-assist.org/secure/tip/main.html
> > Lost Password:
> > http://www.tech-assist.org and select "Lost your Login Info?".
> > Email Archives:
> > //www.freelists.org/archives/techassist/
> >
> >
>
> *****************************************************************************
> The Tech Address Book:
> http://www.tech-assist.org/secure/tip/contact.html
> Add a Repair Tip Here, or Change/Remove your Email Address:
> http://www.tech-assist.org/secure/tip/main.html
> Lost Password:
> http://www.tech-assist.org and select "Lost your Login Info?".
> Email Archives:
> //www.freelists.org/archives/techassist/
*****************************************************************************
The Tech Address Book:
http://www.tech-assist.org/secure/tip/contact.html
Add a Repair Tip Here, or Change/Remove your Email Address:
http://www.tech-assist.org/secure/tip/main.html
Lost Password:
http://www.tech-assist.org and select "Lost your Login Info?".
Email Archives:
//www.freelists.org/archives/techassist/
Other related posts:
