[TechAssist] Re: Dead set
- From: John McKinney <winturbine@xxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Tue, 22 Jan 2002 20:16:34 -0800
After replacing TP15 you should measure the Emitter voltage. It should be
around 12 to 14 VDC. The Emitter of TR03 should be 5 VDC. Both these
standby voltages are needed for startup. TP15 can easily fail again as all
it's stress occurs in standby when the set is plugged in and turned
off. After startup the voltages are provided by the horizontal pick-offs
which relieves this transistor of it's load. After analyzing the circuit I
replace TP15 with NTE399. Just make sure to dress the leads and clock them
correctly (original is EBC and NTE is ECB). This transistor has more power
handling capacity than the original.
John McKinney Service
Anaheim CA.
At 05:11 PM 1/22/2002 -0600, you wrote:
>Jeff,
>The regulator transister in these sets runs extremely hot when in the
>standby mode(off), but cools down when the set is turned on. Don't know why
>but they all do, that's probably why they fail in the first place, although
>I've never had one come back in after replacing the original. I'm not a RCA
>tech, but maybe there is someone who know's if there is a way to solve this
>transister from getting hot, or if its just another of Thomson's
>engineering marvels(like with the tuner grounds)
>
> Dan Webster
> Webster's TV
> Shullsburg, Wi.
>
>----- Original Message -----
>From: Jeff Dougherty <jeff@xxxxxxxxxxxxxxxxxx>
>To: <techassist@xxxxxxxxxxxxx>
>Sent: Tuesday, January 22, 2002 3:24 PM
>Subject: [TechAssist] Re: Dead set
>
>
> >
> > Thanks Dan.
> > This may be why mine is getting hot, though it works for hours.
> >
> > Jeff
> >
> > Intrepid Video & Electronics
> > 501 Luther Rd
> > Harrisburg PA 17111 (FAX)1-717-564-4952
> > www.intrepid-video.com www.tech-repair.net www.thetoolcaddy.com
> > www.9-11-2001tragedy.com
> > mailto:jeff@xxxxxxxxxxxxxxxxxx
> >
> >
> > -----Original Message-----
> > From: techassist-bounce@xxxxxxxxxxxxx
> > [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Webster TV
> > Sent: Tuesday, January 22, 2002 10:35 AM
> > To: techassist@xxxxxxxxxxxxx
> > Subject: [TechAssist] Re: Dead set
> >
> >
> > Jeff,
> > The original Reg. transister was #198752 which had the same baseing as
> > the
> > original transister in the set. The last few times I've ordered the
> > #198752
> > my distributor has said this transister now subs to a #185197. There is
> > instructions in with the #185197 that tells you it may be based
> > differently.
> > I believe instead of E-B-C the new one is E-C-B, so in answer to your
> > question you do have to change the leads. I just slip a piece of heat
> > shrink
> > tubing on to one of the leads to make sure they don't touch one another.
> >
> > Dan Webster
> > Webster's TV
> > Shullsburg, Wi.
> > ----- Original Message -----
> > From: Jeff Dougherty <jeff@xxxxxxxxxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Monday, January 21, 2002 9:07 PM
> > Subject: [TechAssist] Re: Dead set
> >
> >
> > >
> > > Dan and all,
> > > Can someone enlighten me on these?
> > > Do you have to switch the leads for the new transistor?
> > > I have always just replaced the transistor without switching the leads
> > > around to match configuration of original one.
> > >
> > > Jeff
> > >
> > > Intrepid Video & Electronics
> > > 501 Luther Rd
> > > Harrisburg PA 17111 (FAX)1-717-564-4952
> > > www.intrepid-video.com www.tech-repair.net www.thetoolcaddy.com
> > > www.9-11-2001tragedy.com
> > > mailto:jeff@xxxxxxxxxxxxxxxxxx
> > >
> > >
> > > -----Original Message-----
> > > From: techassist-bounce@xxxxxxxxxxxxx
> > > [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Webster TV
> > > Sent: Monday, January 21, 2002 12:24 PM
> > > To: techassist@xxxxxxxxxxxxx
> > > Subject: [TechAssist] Re: Dead set
> > >
> > >
> > > Try changing the Regulator Transister #TP15, part # 198752 which subs
> > to
> > > a
> > > #185197, the new transister(#185197) is based differently than the
> > > original,
> > > so make sure you install it correctly. Common failure in these RCA/GE
> > > sets.
> > >
> > > Dan Webster
> > > Webster's TV
> > > Shullsburg, Wi.
> > > ----- Original Message -----
> > > From: <javiles929@xxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Sent: Sunday, January 20, 2002 2:02 PM
> > > Subject: [TechAssist] Dead set
> > >
> > >
> > > > Set came in dead and fuse blown. I check the HOT and it was shorted
> > so
> > > i
> > > > replace it and CP17 that was overstressed. Turn set on and it works
> > so
> > > i
> > > let
> > > > set warm up and see for any possible changes but nothing, set was
> > > working
> > > > fine. So i replace back cover and try set again but this time set
> > > did`nt
> > > turn
> > > > on. Remove back cover and wiggle the flyback and set went back on so
> > i
> > > > resolder all of the flyback pins and a few other cold solder. Set
> > came
> > > back
> > > > on so i replace back cover and same thing. Can anybody tell what i
> > > have
> > > miss
> > > > to check. There are no cracks on board. Need help.
> > > >
> > > > GE # 13gp10
> > > > Tx825td chassis
> > > >
> > > >
> > > > God Bless you all
> > > >
> > > >
> > > > Aviles Computer & TV Repairs
> > > > Bronx, NY 10452
> > > > Fax # 718-681-3117
> > > >
> > > >
> > > > ------------------------------------------
> > > > Make your TechAssist database better!
> > > > Submit Repair Tips here: http://www.tech-assist.org/secure/tip/
> > > > ------------------------------------------
> > > > To UNSUBSCRIBE your email address, click here:
> > > > mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe
> > > > Or send a BLANK email with unsubscribe in the
> > > > SUBJECT field to the address above.
> > > >
> > >
> > > ------------------------------------------
> > > Make your TechAssist database better!
> > > Submit Repair Tips here: http://www.tech-assist.org/secure/tip/
> > > ------------------------------------------
> > > To UNSUBSCRIBE your email address, click here:
> > > mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe
> > > Or send a BLANK email with unsubscribe in the
> > > SUBJECT field to the address above.
> > >
> > > ------------------------------------------
> > > Make your TechAssist database better!
> > > Submit Repair Tips here: http://www.tech-assist.org/secure/tip/
> > > ------------------------------------------
> > > To UNSUBSCRIBE your email address, click here:
> > > mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe
> > > Or send a BLANK email with unsubscribe in the
> > > SUBJECT field to the address above.
> > >
> >
> > ------------------------------------------
> > Make your TechAssist database better!
> > Submit Repair Tips here: http://www.tech-assist.org/secure/tip/
> > ------------------------------------------
> > To UNSUBSCRIBE your email address, click here:
> > mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe
> > Or send a BLANK email with unsubscribe in the
> > SUBJECT field to the address above.
> >
> > ------------------------------------------
> > Make your TechAssist database better!
> > Submit Repair Tips here: http://www.tech-assist.org/secure/tip/
> > ------------------------------------------
> > To UNSUBSCRIBE your email address, click here:
> > mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe
> > Or send a BLANK email with unsubscribe in the
> > SUBJECT field to the address above.
> >
>
>------------------------------------------
>Make your TechAssist database better!
>Submit Repair Tips here: http://www.tech-assist.org/secure/tip/
>------------------------------------------
>To UNSUBSCRIBE your email address, click here:
>mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe
>Or send a BLANK email with unsubscribe in the
>SUBJECT field to the address above.
------------------------------------------
Make your TechAssist database better!
Submit Repair Tips here: http://www.tech-assist.org/secure/tip/
------------------------------------------
To UNSUBSCRIBE your email address, click here:
mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe
Or send a BLANK email with unsubscribe in the
SUBJECT field to the address above.
Other related posts:
