[TechAssist] Re: Sony STR-D315 one side blown, need schematic
- From: Gary McCartney <gary@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Thu, 23 Jan 2003 18:42:01 -0500
Also tighten all the ground screws in the chassis.
Gary McCartney
McCartney Electronics
7134 Fife Rd, RR 7
Guelph Ontario Canada N1H 6J4
Fax: (519)821-1530
email: gary (at) number63.ca
Technotronic Dimensions wrote:
>
> I did a STRDE415 not too long ago - had bad Q654 (Mp1620) & Q753 (Mn2488)
> transistors blown on one side. Replaced them - never came back again.
> If it uses those transistors, I can probably get them for you. I'd replace
> the whole gang.
>
> Steve
> Technotronic Dimensions, NY (USA)
> www.Technotronic-Dimensions.com
> 1-877-817-9885
> 1-877-817-9885 (FAX)
>
> ----- Original Message -----
> From: "Kevin" <kevintv@xxxxxxx>
> To: "TECH-ASSIST" <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, January 23, 2003 6:21 PM
> Subject: [TechAssist] Sony STR-D315 one side blown, need schematic
>
> > Hi fellow techs,
> >
> > Both output transistors, Q712, Q713 are shorted on one side-and Q755,
> > Q757 are shorted on the other side. Must be a ying/yang thing. Does
> > anyone have the schematic for this Sony STR-D315? I don't repair a lot
> > of stereos so this one seems different to me.
> >
> > I might have shorted Q755 and Q757 when I was measuring the voltages at
> > the outputs with the outputs disconnected. As I was measuring the
> > voltages Q705 fell out of circuit because it was so hot the solder
> > melted. This transistor however still tests good. That is when I
> > checked the other 3 similar transistors and found Q755 and Q757 shorted.
> > I think I tested these before and they tested good. I tested these
> > before because the solder connections looked like they had endured a lot
> > of heat.
> >
> > Kevin Wilks
> > Kevin's TV & Video Repair
> > Penticton BC Canada
> > kevintv@xxxxxxx
> >
> >
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