[TechAssist] Re: Panasonic 20" TVCR PV-M2046 dead,now VCR shuts down]
- From: "J Silverman" <greentron@xxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 26 Sep 2002 19:47:41 -0400
Even more fun if it turns out to be a defective drum motor or drum driver
IC. Most of the service shops around here will not try to change the big
flat-pak ICs, but if they must, they bring the board to us to do it for them
because we have lots of experience at it. If someone is going to give it a
try I suggest they try removing and installing on something from the
boneyard to see what problems they are going to have.
Jerry Silverman
Greentron Inc
4 Newland Ave
Greenville SC 29609
864 232 3889
Fax 271 2080
mailto:greentron@xxxxxxx
----- Original Message -----
From: "armando guerra" <birdie@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, September 26, 2002 5:01 PM
Subject: [TechAssist] Re: Panasonic 20" TVCR PV-M2046 dead,now VCR shuts
down]
>
> Did you check with Andrews Electronics at 1-800-289-0300? I bet you are
going
> to have some fun disoldering this babe not to mention soldering it in
place.
> Mando
> Birdie's TV & Electronics
> Casa Grande, AZ
>
> Phil Bader wrote:
>
> > I found a flat pack IC on bottom location IC1 marked MN6750647A3E. A
> > similar chassis schemo (Quasar VV series) shows an almost identical
> > number amd it is a "syscon/servo/timer/micro. A 100 pin SMD IC. Whew.
> > ($27.79, no stock@ Herman).
> > Probably this IC is what I want.
> > Phil Bader
> >
> > Phil Bader wrote:
> > >
> > > I would appreciate this "servo IC" location and/or number. I tried
> > > researching,but all parts lists on this model have been incomplete.
> > > Thanks,
> > > Phil Bader
> > >
> > > rogerfixit@xxxxxxxx wrote:
> > > >
> > > > Had a 2048 that took both the Audio micro and servo micro so I ditto
> > > > Jerry's response.
> > > >
> > > > Roger G.
> > > >
> > > > Mr. Fix-It Harrisburg, PA WebSite-
> > > > http://mrfixit.netfirms.com
> > > > rogerfixit@xxxxxxxx (alternate - rogerfixit@xxxxxxxxxxxxx )
> > > > FAX 801-705-3748 ; Tel: 717-763-7098 (shop) 717-652-1703(home)
> > > >
> > > > On Tue, 24 Sep 2002 17:43:12 -0400 "J Silverman"
> > > > <greentron@xxxxxxxxxxxxxxxx> writes:
> > > > >
> > > > > Dont see that specific manual, but I recall with that symptom on
the
> > > > > units
> > > > > made in the mid 1990s, checking the PG/FG output pin on the
cylinder
> > > > > driver
> > > > > IC would show very low DC voltage with no signal and measure low
> > > > > ohms to
> > > > > ground. always turned out to be the Syscon/servo IC.
> > > > > Jerry Silverman
> > > > > Greentron Inc
> > > > > 4 Newland Ave
> > > > > Greenville SC 29609
> > > > > 864 232 3889
> > > > > Fax 271 2080
> > > > > mailto:greentron@xxxxxxx
> > > > > ----- Original Message -----
> > > > > From: "Phil Bader" <philbad@xxxxxxxxxx>
> > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > Sent: Tuesday, September 24, 2002 12:40 PM
> > > > > Subject: [TechAssist] Panasonic 20" TVCR PV-M2046 dead,now VCR
shuts
> > > > > down]
> > > > >
> > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > Storm. Dead. Found the usual two transistors shorted: Q801 relay
> > > > > driver
> > > > > > (2SC945) and the "excess current protector" Q523 (2SA564A).
> > > > > Replaced
> > > > > > both,now powers on,channels tune,TV section seems fixed. Insert
a
> > > > > tape
> > > > > > and immediately hear a fast whirring sound increasing in
> > > > > speed,then a
> > > > > > flash of snow,and VCR shuts down. Push any VCR related button
and
> > > > > > ignores it. No eject. Turn power off then on and push eject at
> > > > > once,
> > > > > > will eject tape. I think it sounds like the drum is run-away
speed
> > > > > > spinning.
> > > > > > Phil Bader
> > > > > > --
> > > > > > Philip Bader
> > > > > > Jan Phyl TV Inc. (estab. 1976)
> > > > > > 3420 Recker Hwy. Winter Haven, Fl. 33880
> > > > > > Fax (863) 299-8821
> > > > > > email: philbad@xxxxxxxxxx
> > > > > >
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> > > >
> > > > Roger G.
> > > >
> > > > Mr. Fix-It Harrisburg, PA WebSite-
> > > > http://mrfixit.netfirms.com
> > > > rogerfixit@xxxxxxxx (alternate - rogerfixit@xxxxxxxxxxxxx )
> > > > FAX 801-705-3748 ; Tel: 717-763-7098 (shop) 717-652-1703(home)
> > > >
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> > > --
> > > Philip Bader
> > > Jan Phyl TV Inc. (estab. 1976)
> > > 3420 Recker Hwy. Winter Haven, Fl. 33880
> > > Fax (863) 299-8821
> > > email: philbad@xxxxxxxxxx
> > >
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> >
> > --
> > Philip Bader
> > Jan Phyl TV Inc. (estab. 1976)
> > 3420 Recker Hwy. Winter Haven, Fl. 33880
> > Fax (863) 299-8821
> > email: philbad@xxxxxxxxxx
> >
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