[TechAssist] Re: SONY VCR, SLV-676HF eject motor has 5V on it continuously [FIXED]
- From: Gary McCartney <number63@xxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Thu, 21 Feb 2002 10:40:10 -0500
To make me feel better, I'm gonna blame this one on Sony, at least
partially.
On the board I call the sensor board # M-49 (also called the table),
there are two 3 pin sockets at the edge, beside each other. The one
socket is white (CN008) and the other is yellow (CN005). There is one 3
pin plug, white in color which comes from the eject motor.
Naturally, I plugged the white plug into the white socket. After doing
some continuity tests, I found that there was no continuity between the
eject motor and the motor driver IC, IC502. Then realized that the
continuity was there between yellow socket CN005 and the motor driver
IC, IC502. Plugged 3 pin connector from motor into CN005 and unit now
ejects as normal.
I guess the people on the Sony assembly line are color blind.
Thanks, Bill for your reply. That was an excellent idea to pull the
motor plug to see if the VCR functioned, which it did, so that
elimiminated mode switch and sensors as the problem.
Gary McCartney
McCartney Electronics
7134 Fife Rd, RR 7
Guelph Ontario Canada N1H 6J4
Fax: (519)821-1530
email: number63@xxxxxxxxxxxxx
Premium Technologies wrote:
>
> Gary, what happens when you pull the carriage and allow the load motor to
> free-wheel?
> >From what you described, that it was working before you pulled the table, I
> would suspect the load switch and the tape end sensors before the motor IC.
> I don't have a schem, or pinout for that one, but I'd bet that the IC is not
> you're problem. Pull the carriage and let it free-wheel for a moment, with
> the tape-end sensors disabled. Then re-check the alignment on you're mode
> switch.
> Hope this helps.
> Bill
>
> Premium Technologies
> 27501 V Street
> Ocean Park, Washington 98640
> Phone: (360) 665-5984
> Fax: (775) 860-7747
> email: premtech@xxxxxxxxxxxxxx
> ----- Original Message -----
> From: "Gary McCartney" <number63@xxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Wednesday, February 20, 2002 8:21 AM
> Subject: [TechAssist] SONY VCR, SLV-676HF eject motor has 5V on it
> continuously
>
> >
> > When I first got this VCR, it was taking cassette in and ejecting no
> > problem.
> > Then I removed the sensor circuit board on bottom
> > so I could pull the capstan motor out to clean and lube it. Then after
> > putting it
> > back together, the unit would not take a cassette in.
> > I noticed that I didn't have all the connectors on the board plugged in.
> > Have now made sure everything is plugged in, still doesn't work. What I
> > have found is that there is +5V on the eject motor all the time. If I
> > push the cassette in manually with the VCR unplugged and then plug it
> > in, instantly the tape ejects because of the 5V to the
> > motor. I soldered the sensor circuit board, checked the leaf switch on
> > the right side of the carriage, checked the cassette in switch. Checked
> > that index mark on mode switch lined up with mark on gear. I am thinking
> > maybe bad eject motor driver IC. Have searched the net with Google and
> > tried free Trade Zone to get pinouts for the eject motor IC BU6238A.
> >
> > Does anyone have pinouts for eject motor IC BU6238A or a schematic of
> > that area of the circuit?
> >
> > Thanks for any help.
> > --
> >
> >
> >
> > Gary McCartney
> >
> > McCartney Electronics
> > 7134 Fife Rd, RR 7
> > Guelph Ontario Canada N1H 6J4
> > Fax: (519)821-1530
> > email: number63@xxxxxxxxxxxxx
> > ------------------------------------------
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