[TechAssist] Re: SYMPHONIC TV/VCR, M:TVCR9F1, power supply problem

  • From: gulftech@xxxxxxxx
  • To: techassist@xxxxxxxxxxxxx
  • Date: Tue, 15 Oct 2002 19:54:07 -0500

Matt,

Did you change the 7806?  Fixed a half dozen this year with that same
symptom.  Don't mean to imply that that is the only thing to cause that,
but give it a try.  Check the output voltage, or just replace the darn
thing.


Ken Smith
Gulf Technical Services
3034 Gulf Breeze Parkway
Gulf Breeze, FL  32563
850-934-8324 (Voice) 850-932-0819 (Fax)


On Tue, 15 Oct 2002 17:40:32 -0600 John Mielke <maintv2002@xxxxxxxxxxxxx>
writes:
> 
> Yes, you are right, there is an IC651 (6v regulator) on the power 
> supply 
> board just above the DC regulator transistor.  It was my mistake, I 
> hope 
> I didn't mislead you.   Are you still working on this TV or have you 
> found the problem.   John.
> 
> 
> gulftech@xxxxxxxx wrote:
> > According to my records, there is an IC651 in that set, a 7806 
> regulator,
> > and I have replaced it to solve that problem.  The TVCR9G1 has 
> problems
> > of no start caused by a little 47ufd, 16 volt cap, C1622.  I 
> mention this
> > because I once had two sets with the same model number, that were 
> quite
> > different inside.
> > 
> > HTH,
> > 
> > 
> > Ken Smith
> > Gulf Technical Services
> > 3034 Gulf Breeze Parkway
> > Gulf Breeze, FL  32563
> > 850-934-8324 (Voice) 850-932-0819 (Fax)
> > 
> > 
> > On Mon, 14 Oct 2002 13:24:17 -0600 John Mielke 
> <maintv2002@xxxxxxxxxxxxx>
> > writes:
> > 
> >>Check the connections at the DC jack, if the ground connections 
> are 
> >>open 
> >>it could cause those symptoms.  Then check the caps on the PS-Defl 
> >>board 
> >>and check Q631 (2SA1469) for short.  No, there is not a IC651 in 
> >>this 
> >>set.  They could mean IC601, the power supply driver or IC851, the 
> >>audio 
> >>output.  Why not connect it to DC, that would eliminate the power 
> >>supply.  And of course suspect connections bad on that board.  If 
> >>you 
> >>need I can send the voltages that should be on the 2 plugs on the 
> >>front 
> >>of the PS board.   John.
> >>
> >>matt sherer wrote:
> >>
> >>>Symphonic
> >>>TV/VCR
> >>>Model: TVCR9F1
> >>>When you plug the unit in,it comes on automatically.  Loud buzz 
> >>
> >>from the
> >>
> >>>speaker, no button functions work.  dark pic but turning up the 
> >>
> >>screen on
> >>
> >>>the flyback bring sup a raster.  checked caps in the ps and found 
> >>
> >>nothing.
> >>
> >>>This is a 120vac/12vdc model.  I found a tip in database to check 
> >>
> >>for IC651
> >>
> >>>and did not find that chip.  PS and deflection share the same 
> >>
> >>board.  Anyone
> >>
> >>>know some test points to check the PS voltages?  TIA!!
> >>>
> >>>
> >>>Gear Guy
> >>>Electronic repair
> >>>A/V systems design, maintenance and installation
> >>>AMX programming
> >>>Matt Sherer, CET
> >>>1411 Honeysuckle Lane
> >>>Champaign, IL 61821
> >>>(217)356-9479
> >>>m.sheer@xxxxxxxxxxxxx
> >>>
> >>>
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> >>
> >>-- 
> >>John Mielke
> >>Main TV
> >>Longmont,Co
> >>303 776 6955
> >>maintv2002@xxxxxxxxxxxxx
> >>
> >>
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> 
> -- 
> John Mielke
> Main TV
> Longmont,Co
> 303 776 6955
> maintv2002@xxxxxxxxxxxxx
> 
> 
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