[TechAssist] Re: Update: Panasonic PVM939 combi, chassis KM99V dead (sort of)
- From: Edvin E Weickum <edandroy@xxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 22 Aug 2003 14:23:04 -0700
Hello again,
I didn't find your Combi model but from my Records the unit It was a
Sansusi COM 0953 combi. "I pulled the power connector and found it had a
built-in switch (used to detect AC power cord and set unit up for either
AC or DC power. Found one of the three pins for the internal switch burnt
off. Pushing in plug into the connector operated the internal switch.
Pulled one from stock parts set restoring units operations."
If I remember the unit right, there was also a DC jack for DC operations.
During AC operations the internal switch set unit up for AC and not DC
operation. I pulled an old connector from a parts set and using it
cleared my problems.
Ed...
On Thu, 21 Aug 2003 10:39:31 -0600 John at Main TV <maintv@xxxxxxxxxxx>
writes:
> Hello. Thanks for your suggestion. That could easily be the problem
>
> but it is hard to tell without a schematic. The DC power cord has 3
> pin
> plus a shield and the third pin does make a connection to the
> circuit
> but I could not trace it out. Were you working on this same model?
> It
> is also similar to PV-C921. Thanks again, John.
>
>
> Edvin E Weickum wrote:
>
> > Hello,
> >
> > Not sure if this will help but I worked on a AC/DC Combi with
> similar
> > problem and it turned out to be the power plug connector. It had an
> > internal switch in it that informed the unit as to AC or DC
> operations.
> > You might check that.
> >
> > Hope that was of some help. Didn't see your earlier post's.
> >
> > Good luck,
> >
> > Ed..
> > CET, K7NJD
> > Jim West Tv Service
> > Oregon City,Oregon
> >
> >
> >
> > On Tue, 19 Aug 2003 14:28:56 -0600 John at Main TV
> <maintv@xxxxxxxxxxx>
> > writes:
> >
> >>I am still working on this combi Panasonic PVM939 (chassis KM99V)
> 9"
> >>AC/DC made in 1999. It has the separate power supply across the
> >>back.
> >>It came in dead but I found that if I MOMENTARILY short the
> contacts
> >>of
> >>the relay RL1001 on the PS board it will work on AC or DC until I
> >>unplug
> >>it. When I do unplug it, it will not start again by itself. I do
> >>not
> >>have a service manual for this. Can someone tell me what controls
> >>this
> >>relay or can someone send a schematic of the power supply. I need
>
> >>to
> >>have this finished by the weekend. Thanks, John.
> >>--
> >>John Mielke
> >>Main TV
> >>Longmont,Co 80501
> >>303 776 6955
> >>303 776 0792 fax
> >>maintv@xxxxxxxxxxx
> >>
> >>
> >>
> >
> >
>
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> --
> John Mielke
> Main TV
> Longmont,Co 80501
> 303 776 6955
> 303 776 0792 fax
> maintv@xxxxxxxxxxx
>
>
>
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