YAMAHA CX 1000 vintage stereo control

kdlsrinu · 18th September 2007, 04:20 PM

hai friends my YAMAHA CX 1000 vintage stereo control preamplifier motor driven volume control is not responding to remote signal. i found that when i am using the remote to raise or lower the volume the motor is rotating but the volume knob is not rotating.
any suggetions?

Bigred · 18th September 2007, 07:58 PM

You found that when using the remote to raise or lower the volume the motor is rotating but the volume knob is not rotating. That tells me that the remote IS responding. Check to see if the motor is actually turning the potentiometer.

Edit: Since the knob isn't turning I suspect the motor isn't turning the pot and its not an actual circuit fault.

anatech · 19th September 2007, 02:42 AM

Hi kdlsrinu,
Nice preamp.
Since the motor is turning but not the control, you have a mechanical failure. I assume you can hear the motor turning.

Since you live in a hot area, it is possible the nylon gear on the motor shaft has cracked due to expansion. If you manage to fix it, it may not last. See if you can get a new control from Yamaha. Others may work, but shaft length and end style (for the knob) may differ. Make it easy on yourself and get the original if you can.

The last option is to accept that you must get up to change the volume.

-Chris

kdlsrinu · 19th September 2007, 06:30 AM

hai friends
today i opended the cx 1000(very good build quality) and found that the motor is rotating for remote signals but the potentio meter is not rotating. getting the oreginal spare is not possibel,because the stuff belongs to more than 16 years old. is there any suggetions to repair?

anatech · 19th September 2007, 04:32 PM

Hi kdlsrinu,
The fault is mechanical. Have a good look. Examine before touching anything.

Yamaha can sometimes special order old parts. Each country has it's own stock as well.

-Chris

18th September 2007, 04:20 PM	#1
kdlsrinu diyAudio Member Join Date: Aug 2005	YAMAHA CX 1000 vintage stereo control hai friends my YAMAHA CX 1000 vintage stereo control preamplifier motor driven volume control is not responding to remote signal. i found that when i am using the remote to raise or lower the volume the motor is rotating but the volume knob is not rotating. any suggetions?

19th September 2007, 02:42 AM	#3
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi kdlsrinu, Nice preamp. Since the motor is turning but not the control, you have a mechanical failure. I assume you can hear the motor turning. Since you live in a hot area, it is possible the nylon gear on the motor shaft has cracked due to expansion. If you manage to fix it, it may not last. See if you can get a new control from Yamaha. Others may work, but shaft length and end style (for the knob) may differ. Make it easy on yourself and get the original if you can. The last option is to accept that you must get up to change the volume. -Chris __________________ "Just because you can, doesn't mean you should" © my Wife

19th September 2007, 04:32 PM	#5
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi kdlsrinu, The fault is mechanical. Have a good look. Examine before touching anything. Yamaha can sometimes special order old parts. Each country has it's own stock as well. -Chris __________________ "Just because you can, doesn't mean you should" © my Wife

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18th September 2007, 07:58 PM	#2
Bigred diyAudio Member Join Date: Jul 2007	You found that when using the remote to raise or lower the volume the motor is rotating but the volume knob is not rotating. That tells me that the remote IS responding. Check to see if the motor is actually turning the potentiometer. Edit: Since the knob isn't turning I suspect the motor isn't turning the pot and its not an actual circuit fault.

19th September 2007, 06:30 AM	#4
kdlsrinu diyAudio Member Join Date: Aug 2005	hai friends today i opended the cx 1000(very good build quality) and found that the motor is rotating for remote signals but the potentio meter is not rotating. getting the oreginal spare is not possibel,because the stuff belongs to more than 16 years old. is there any suggetions to repair?

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