Speaker - terminal connected to the AC line?
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From: William R. Walsh on 24 May 2010 00:03 Hello all... I have a Technics SA-929 stereo receiver that is in good working order. However, when I was inside it replacing a burnt out light bulb and repairing the protection relay, I noticed that there is a wire coming from the printboard that holds both the AC power input and accessory outlet connections going to the "speaker -" connector for the "B" speaker terminals. There is a resistor inline with the wire coming from the AC wiring board. I've never noticed anything like this in a stereo receiver before. As the previous owner seems to have been very meticulous about packing it up, I believe the non-polarized power cord set is original to the unit. What would this do? Is it dangerous? William
From: Phil Allison on 24 May 2010 00:12 "William R. Walsh" > > I have a Technics SA-929 stereo receiver that is in good working order. > However, when I was inside it replacing a burnt out light bulb and > repairing > the protection relay, I noticed that there is a wire coming from the > printboard that holds both the AC power input and accessory outlet > connections going to the "speaker -" connector for the "B" speaker > terminals. > > There is a resistor inline with the wire coming from the AC wiring board. > ** Resistors have values - did you not check it ?? > I've never noticed anything like this in a stereo receiver before. ** Certainly unusual. > What would this do? ** Tell us the value of the resistor. Betcha it is about 10 Mohms. ...... Phil
From: PeterD on 24 May 2010 08:45 On Sun, 23 May 2010 23:03:29 -0500, "William R. Walsh" <newsgroups1(a)idontwantjunqueemail.walshcomptech.com> wrote: >Hello all... > >I have a Technics SA-929 stereo receiver that is in good working order. >However, when I was inside it replacing a burnt out light bulb and repairing >the protection relay, I noticed that there is a wire coming from the >printboard that holds both the AC power input and accessory outlet >connections going to the "speaker -" connector for the "B" speaker >terminals. > >There is a resistor What value? >inline with the wire coming from the AC wiring board. Where on the AC wiring board? The ground? The neutral? The hot wire? Where? > >I've never noticed anything like this in a stereo receiver before. You've never looked then... >As the >previous owner seems to have been very meticulous about packing it up, I >believe the non-polarized power cord set is original to the unit. > >What would this do? Is it dangerous? > >William >
From: Meat Plow on 24 May 2010 09:04 On Sun, 23 May 2010 23:03:29 -0500, William R. Walsh wrote: > Hello all... > > I have a Technics SA-929 stereo receiver that is in good working order. > However, when I was inside it replacing a burnt out light bulb and > repairing the protection relay, I noticed that there is a wire coming > from the printboard that holds both the AC power input and accessory > outlet connections going to the "speaker -" connector for the "B" > speaker terminals. > > There is a resistor inline with the wire coming from the AC wiring > board. > > I've never noticed anything like this in a stereo receiver before. As > the previous owner seems to have been very meticulous about packing it > up, I believe the non-polarized power cord set is original to the unit. > > What would this do? Is it dangerous? > > William Got schematic?
From: Adrian C on 24 May 2010 09:37
On 24/05/2010 05:03, William R. Walsh wrote: > Hello all... > > I have a Technics SA-929 stereo receiver that is in good working order. > However, when I was inside it replacing a burnt out light bulb and repairing > the protection relay, I noticed that there is a wire coming from the > printboard that holds both the AC power input and accessory outlet > connections going to the "speaker -" connector for the "B" speaker > terminals. > > There is a resistor inline with the wire coming from the AC wiring board. It's strange. Skip forward 8m:05s on following video. http://www.youtube.com/watch?v=sgdTnBU0_N0 No idea :-| -- Adrian C |