Hi, the volume control of my yamaha ap-u70 doensn't function correct anymore. it goes up and down when you turn the knob. can this be repeared (by cleaning the inside or replacement by what type?)
thanks, Rob Groot, the Netherlands
- Unplug Ap-U70 from power - Remove side and top plates - Remove front panel (3 connectors onboard) - Lift up front pcb from the main plasic front
Then you see the poti with 4 clamps - bend the 4 clamps carefully aside and open the poti - you will see there's alot of oil/fat inside the poti that shouldn't be there - remove it all with some cleaning fluids
Assemble all together and see: Volume control is back
Within the years the oil/fat goes where it shouldn't ...
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Very simple. It is not a defective unit. Simply a matter of volume attenuation, hold the "function" and "grove"keys for aprox 5 seconds until a message saying vac off appears. Problem solved. Resets itself eveytime the unit is turned off .
The volume keys should be working by default, but you may have volume punch through turned on (meaning the remote is sending signals for TV or CABLE volume function no matter what mode you are actually on). To unlock volume control for AUX mode, do the following: 1. Press and release AUX 2. Press and hold SETUP until the remote blinks twice 3. Type 993 4. Press and release VOL- The remote should blink four times to confirm unlock.
- Single item, or fixed. This unit will only operate the unit it came with - Multi function, this type can operate the unit it came with and a fixed set of other types. Normally the remote comes with a list of supported device it could work with. - Learning, the combine both a predefined list with the ability to learn functions by sensing input from the original remote. - Programable. These are the newest remotes that work like multifunction but the list is maintained by the manufacturer and down loadable from the web.
I would guess that the DVR has a multi function remote. If you can't find the specific Yamaha in the list, then try another brand, this could take a while.
Some multi function remotes have an option that allow a semi automatic configuration. You turn on the item and then using a special key sequence try to turn off the device. once the item turns off you should be able to control it.
If you can't the Yamaha has a learning remote. If you really want an easy solution try looking at a programmable remote. I just got a Logitech, (Harrmony). Life has never been so easy.
This sounds like a case of a dirty/defective rotary encoder. The volume control used here is not the conventional potentiometer type , but a rotary set of switches that tell the sytem if the knob is being turned left ot right.
Do you think you'd be able to open the unit and spray some contact cleaner into the rotary encoder? It might involve dis-assembling it down to front bezel removal.
It may be that your device is operating in 6 channels mode. You can correct that by pressing the USB button on the AP-U70 until the display says USB_Xch. Then select the right mode (USB_2ch) with the < and > buttons and press the USB button again until is says Xch->2ch. Sometimes you have to disconnect the device from your computer, or you may not be able to select an other mode.
I use the AP-U70 with Vista and even then it works, although the program for making adjustments does not. By telling you this I want to say that the AP-U70 is rather compatible and not one of that always having trouble devices.
Per Yamaha support page:
The volume light on my Yamaha AV receiver is flashing, what does this mean ?
The "MUTE" function on your remote control has been activated. The reason that you can still hear a very low sound is that the muting circuit within your stereo is not a full mute, but rather a -20dB mute. To deactivate the "MUTE" function, simply press the "MUTE" button on your remote control. (Make sure the volume control is turned down to avoid damage to your system.) If you misplace or lose your remote control, you will have to purchase a new remote control unit, as there is no duplicate function on the front panel of your stereo. Unplugging the stereo will not deactivate the muting circuit, as the microprocessor "remembers" if the muting circuit was active prior to being turned off or unplugged. If you need to purchase a remote control, you may order one directly from our parts office. You may reach them by dialing (714) 522-9888 from 8 am to 3 p.m. Pacific Time, Monday through Friday. If you have any other questions, please contact our customer service department by dialing (800) 292-2982 Monday through Friday from 8:00 a.m. to 4:00 p.m.