<![CDATA[ChipMusic.org - Losing the right channel when closing (switched both pcb's)]]> https://chipmusic.org/forums/topic/8292/losing-the-right-channel-when-closing-switched-both-pcbs/ Wed, 29 Aug 2012 14:56:27 +0000 PunBB <![CDATA[Re: Losing the right channel when closing (switched both pcb's)]]> https://chipmusic.org/forums/post/129807/#p129807 relo says:

After some checking I noticed that the right channel is also gone in the speaker, strange...

12ianma wrote:

Where are your ground and 2 audio lines coming from to the RCAs

top 2 and the ground on the lowest of the regular 5 prosound spots.

]]> Wed, 29 Aug 2012 14:56:27 +0000 https://chipmusic.org/forums/post/129807/#p129807 <![CDATA[Re: Losing the right channel when closing (switched both pcb's)]]> https://chipmusic.org/forums/post/129786/#p129786 relo says:
Timbob wrote:

If it's not the front pcb or the back pcb, then it can only be the case itself or the output jack..

Somehow...

I forgot to check the RCA jack for stereo (my own stupidity...), it has it. So it seems to be the output jack.

]]> Wed, 29 Aug 2012 09:49:35 +0000 https://chipmusic.org/forums/post/129786/#p129786 <![CDATA[Re: Losing the right channel when closing (switched both pcb's)]]> https://chipmusic.org/forums/post/129782/#p129782 12ianma says:

Where are your ground and 2 audio lines coming from to the RCAs

]]> Wed, 29 Aug 2012 07:59:44 +0000 https://chipmusic.org/forums/post/129782/#p129782 <![CDATA[Re: Losing the right channel when closing (switched both pcb's)]]> https://chipmusic.org/forums/post/129781/#p129781 Telerophon says:

I mean, I'd assume the headphone amp daughterboard is included with the back PCB when he replaced it.

All I can think of is a bad solder somewhere, but I wouldn't know where to start troubleshooting that if it's been redone over and over.

Maybe part of the RCA for the right channel shorts when you close it?

]]> Wed, 29 Aug 2012 07:51:40 +0000 https://chipmusic.org/forums/post/129781/#p129781 <![CDATA[Re: Losing the right channel when closing (switched both pcb's)]]> https://chipmusic.org/forums/post/129780/#p129780 Timbob says:

If it's not the front pcb or the back pcb, then it can only be the case itself or the output jack..

Somehow...

]]> Wed, 29 Aug 2012 07:36:02 +0000 https://chipmusic.org/forums/post/129780/#p129780 <![CDATA[Re: Losing the right channel when closing (switched both pcb's)]]> https://chipmusic.org/forums/post/129704/#p129704 relo says:

May I first ask how that can help when I have replaced the full back PCB without any luck of solving it?

]]> Tue, 28 Aug 2012 21:33:23 +0000 https://chipmusic.org/forums/post/129704/#p129704 <![CDATA[Re: Losing the right channel when closing (switched both pcb's)]]> https://chipmusic.org/forums/post/129683/#p129683 Telerophon says:

For the record, that is a stereo pcb mount linear wheel potentiometer.

]]> Tue, 28 Aug 2012 20:09:12 +0000 https://chipmusic.org/forums/post/129683/#p129683 <![CDATA[Re: Losing the right channel when closing (switched both pcb's)]]> https://chipmusic.org/forums/post/129681/#p129681 GoingHam says:

Pitch mod is irrelevant to what I am purposing. To be a bit more specific, locate one of these to replace the volume knob, wheel, dial

]]> Tue, 28 Aug 2012 20:04:35 +0000 https://chipmusic.org/forums/post/129681/#p129681 <![CDATA[Re: Losing the right channel when closing (switched both pcb's)]]> https://chipmusic.org/forums/post/129680/#p129680 Telerophon says:

From the Wikipedia article about Potentiometers:

Wikipedia wrote:

Potentiometers comprise a resistive element, a sliding contact (wiper) that moves along the element, making good electrical contact with one part of it, electrical terminals at each end of the element, a mechanism that moves the wiper from one end to the other, and a housing containing the element and wiper.

Many inexpensive potentiometers are constructed with a resistive element formed into an arc of a circle usually a little less than a full turn, and a wiper rotating around the arc and contacting it. The resistive element, with a terminal at each end, is flat or angled. The wiper is connected to a third terminal, usually between the other two. On panel potentiometers, the wiper is usually the center terminal of three. For single-turn potentiometers, this wiper typically travels just under one revolution around the contact. The only point of ingress for contamination is the narrow space between the shaft and the housing it rotates in.

]]> Tue, 28 Aug 2012 20:01:26 +0000 https://chipmusic.org/forums/post/129680/#p129680 <![CDATA[Re: Losing the right channel when closing (switched both pcb's)]]> https://chipmusic.org/forums/post/129677/#p129677 relo says:
GoingHam wrote:

You could try replacing the wheel potentiometer for the volume control. I tried it and it worked for myself so I don't know give it a shot.

I dont have a pitch mod, only backlight, biversion and RCA prosound.

Telerophon wrote:

Or you could clean the existing one by getting some rubbing alcohol into the wipers with a Q-tip and rolling it back and forth a few dozen times. That might do it, I've had the wipers stick in a couple of mine before.

Wipers?

]]> Tue, 28 Aug 2012 19:54:23 +0000 https://chipmusic.org/forums/post/129677/#p129677 <![CDATA[Re: Losing the right channel when closing (switched both pcb's)]]> https://chipmusic.org/forums/post/129672/#p129672 Telerophon says:

Or you could clean the existing one by getting some rubbing alcohol into the wipers with a Q-tip and rolling it back and forth a few dozen times. That might do it, I've had the wipers stick in a couple of mine before.

]]> Tue, 28 Aug 2012 19:21:01 +0000 https://chipmusic.org/forums/post/129672/#p129672 <![CDATA[Re: Losing the right channel when closing (switched both pcb's)]]> https://chipmusic.org/forums/post/129670/#p129670 GoingHam says:

You could try replacing the wheel potentiometer for the volume control. I tried it and it worked for myself so I don't know give it a shot.

]]> Tue, 28 Aug 2012 19:12:58 +0000 https://chipmusic.org/forums/post/129670/#p129670 <![CDATA[Re: Losing the right channel when closing (switched both pcb's)]]> https://chipmusic.org/forums/post/129658/#p129658 relo says:

Not that I can tell. there aren't any bare wires that can touch anything.

]]> Tue, 28 Aug 2012 18:24:03 +0000 https://chipmusic.org/forums/post/129658/#p129658 <![CDATA[Re: Losing the right channel when closing (switched both pcb's)]]> https://chipmusic.org/forums/post/129655/#p129655 herr_prof says:

is something shorting out once the case is closed? A bare wire touching another part of the pcb?

]]> Tue, 28 Aug 2012 18:14:59 +0000 https://chipmusic.org/forums/post/129655/#p129655 <![CDATA[Losing the right channel when closing (switched both pcb's)]]> https://chipmusic.org/forums/post/129651/#p129651 relo says:

I'm losing my right stereo channel when I close the DMG, I tried switching pcb's on both the back and front with no luck. Could somebody tell me how I can fix it or at least how it can happen (precisely), because I'm at a loss.

]]> Tue, 28 Aug 2012 18:07:39 +0000 https://chipmusic.org/forums/post/129651/#p129651