Looking at the [https://servlib.com/sharp/audio/xl-hp404-sm13.html|service manual] the Volume Control is designated as component #VR701 which has a Sharp component part #QSW-ZA002AWZZ.
This is a ''rotary encoder'' type control switch and not a resistive potentiometer type control switch.
The only [https://encompass.com/item/6053350/Sharp/QSW-ZA002AWZZ/|supplier] found when searching online for a replacement part shows that it is no longer available so you may have to try and fix it yourself as having the easier option of replacing it is not available.
Here’s a [https://www.youtube.com/watch?v=lylpr1anaLg|video] that shows how to clean a rotary encoder switch, that may help.
-
The manual I linked shows how to dis-assemble the unit so that access to the volume control encoder switch is possible. Admittedly the manual is not easy to use as you have to alter the page number in the box below the Document box and click Go every time that you wish to change the page. To download the manual you have to sign up with the website.
+
The manual I linked shows how to dis-assemble the unit so that access to the volume control encoder switch is possible. Admittedly the manual is not easy to use as you can only view it online and have to alter the page number in the box below the Document box and click Go every time that you wish to change the page. To download the manual so making it easier to use, you have to sign up with the website.
If doing this yourself seems too daunting, contact a reputable professional electronics repair service and ask for a quote. If they are not familiar with the system tell them about the service manual and the fact that it is a rotary encoder. If they are any good then after that it will be no problem for them
Looking at the [https://servlib.com/sharp/audio/xl-hp404-sm13.html|service manual] the Volume Control is designated as component #VR701 which has a Sharp component part #QSW-ZA002AWZZ.
-
As best as I can find out this is a ''rotary encoder'' type control switch and not a resistive potentiometer type control switch.
+
This is a ''rotary encoder'' type control switch and not a resistive potentiometer type control switch.
The only [https://encompass.com/item/6053350/Sharp/QSW-ZA002AWZZ/|supplier] found when searching online for a replacement part shows that it is no longer available so you may have to try and fix it yourself as having the easier option of replacing it is not available.
Here’s a [https://www.youtube.com/watch?v=lylpr1anaLg|video] that shows how to clean a rotary encoder switch, that may help.
The manual I linked shows how to dis-assemble the unit so that access to the volume control encoder switch is possible. Admittedly the manual is not easy to use as you have to alter the page number in the box below the Document box and click Go every time that you wish to change the page. To download the manual you have to sign up with the website.
If doing this yourself seems too daunting, contact a reputable professional electronics repair service and ask for a quote. If they are not familiar with the system tell them about the service manual and the fact that it is a rotary encoder. If they are any good then after that it will be no problem for them
Hi @bobrich18
Looking at the [https://servlib.com/sharp/audio/xl-hp404-sm13.html|service manual] the Volume Control is designated as component #VR701 which has a Sharp component part #QSW-ZA002AWZZ.
As best as I can find out this is a ''rotary encoder'' type control switch and not a resistive potentiometer type control switch.
The only [https://encompass.com/item/6053350/Sharp/QSW-ZA002AWZZ/|supplier] found when searching online for a replacement part shows that it is no longer available so you may have to try and fix it yourself as having the easier option of replacing it is not available.
Here’s a [https://www.youtube.com/watch?v=lylpr1anaLg|video] that shows how to clean a rotary encoder switch, that may help.
The manual I linked shows how to dis-assemble the unit so that access to the volume control encoder switch is possible. Admittedly the manual is not easy to use as you have to alter the page number in the box below the Document box and click Go every time that you wish to change the page. To download the manual you have to sign up with the website.
If doing this yourself seems too daunting, contact a reputable professional electronics repair service and ask for a quote. If they are not familiar with the system tell them about the service manual and the fact that it is a rotary encoder. If they are any good then after that it will be no problem for them
Hopefully this is of some help.