[TechAssist] Re: Symphonic TVCR model WF0213C (mfgrd.2002)dead,whine
- From: Philip Bader <tjanphyl@xxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 25 Jul 2003 16:39:36 -0400
Replaced D629 (1N4148),D615 (33V zener),Q606 (used a 2sa950/NTE290).
Powered up good picture.waited 30 seconds, did a channel auto program.
after another 30 seconds, sides flutuated,shut down.
All my parts are OK.Plug in, smps does not whine. Have 5V standby at 5V
reg IC602.
Push power,can hear a slight chirp on sound,but never powers up.
Phil Bader
Philip Bader wrote:
>
> Appears to interconnect with several white ribbon cables.
> At the risk of sounding ignorant, I am on the download site now,but
> what's the file name? None appear to be the right one without opening
> them all...
> D615 you refer to as over voltage crowbar appears to be from my
> research, a 33 volt zener.
> My A1271Y transistor crosses to an NTE383 PNP.
> Thanks in advance,
> Phil Bader
>
> John at Main TV wrote:
> >
> > I am not familiar with that exact model number. Does the VCR mechanism
> > unpluf from the board or is it connected to the board with ribbon cable?
> > It appears your model is the same as Symphonic SC313C, Syl 6313CC,
> > Emerson EWC1302 and that manual is on the tech-assist members area for
> > download. There is also a cross reference for Funai combi's in the
> > members area. (combi model cross). Please let me know how your
> > mechanism attatchs to the board so I know which mechanism it is and I
> > will add it to the "combi model cross".
> > On your TV, Q606 is apparently the 12v power on switch/regulator and
> > D615 is an over-voltage protection crowbar on the 25v line. If that is
> > shorted it would make the power supply whine and not run. John.
> >
> > Philip Bader wrote:
> > > Unresponsive.Dead.Fuses all OK.
> > > Plug in and hear a very faint whine from the SMPS.
> > > Testing found the following SMPS parts shorted:
> > > Transistor Q606,(small case, A1271 on part).(2SA1271?)
> > > Diode D615,, small black, Zener symbol on board: (on part:2.B, ZC, 33)
> > > Diode D629, small glass.No# on part.
> > > All shorted. Need parts ID on these, and possible pattern of known
> > > damage from any histories on this symptom/model.
> > > Possible lightning,considering our weather.
> > > Phil Bader
> >
> > --
> > John Mielke
> > Main TV
> > Longmont,Co 80501
> > 303 776 6955
> > 303 776 0792 fax
> > maintv@xxxxxxxxxxx
> >
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> --
> Philip Bader
> Jan Phyl TV Inc. (estab. 1976)
> 3420 Recker Hwy. Winter Haven, Fl. 33880
> Fax (863) 299-8821
> email: tjanphyl@xxxxxxxxxxxxxxx
>
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--
Philip Bader
Jan Phyl TV Inc. (estab. 1976)
3420 Recker Hwy. Winter Haven, Fl. 33880
Fax (863) 299-8821
email: tjanphyl@xxxxxxxxxxxxxxx
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