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Aux911DG Problem

Vincent D

Vincent D

Vino.
Hi all,
Hoping for some help with my Aux 911DG. I usually use this system for listening to CDs, and I'm using a TOSLINK interconnect from the Digital out on the CDP ( Marantz CD63 S.E. K.I.) to the Optical in on the Amp. The input is set to "Digital Direct" and the Amp is running a pair of Sansui EX series speakers. So far, so good. The Sound this combination puts out is absolute ear candy.
However, last night I decided to listen to some vinyl, and was shocked to find that as soon as I turned off the Digital Direct, no other source would work. when I select Phono (or any other analogue source) the indicator will light for a few seconds and then go off. I opened it up and applied Deoxit, but even with the faceplate removed, it was pretty hard to get to the pots, and I really didn't want to take it apart too much in case I damaged something. Anyway I reassembled it, but its still the same. Would anyone know if it might be the source selector belt? Or, I would be glad of any other suggestions. I'm hoping JOMARK911 will see this, as I know he has three 911s, and is very knowledgeable on this particular Amp.
 
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Hi Vincent,

I do think its because of the selector. If its not working,then you cant select the input button. I recently bought a AU X911dg and also has the same issue,sometimes when i press the tuner,its goes to the CD and i also had drop channels issue. The weird thing when i use the digital in,coaxial or optical with "digital direct",it works good. Hope Jomark will see you post soon and provide some useful information to get it back in shape. :)
 
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rasenthiran said:
Hi Vincent,

I do think its because of the selector. If its not working,then you cant select the input button. I recently bought a AU X911dg and also has the same issue,sometimes when i press the tuner,its goes to the CD and i also had drop channels issue. The weird thing when i use the digital in,coaxial or optical with "digital direct",it works good. Hope Jomark will see you post soon and provide some useful information to get it back in shape. :)
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Well in a way that's probably good news. I was hoping it would be a known issue. Not looking forward to replacing the belt though, I'm guessing the chances of getting the correct replacement part will be zero, and I'll just have to use an elastic band or make the part myself. Anyway thanks for letting me know, I can familiarize myself with the replacement procedure while I wait for more information.
 
Hi Vincent D and rasenthiran. When I first got my used X911 DG the DAC didn't work, nor did the other settings work consistently. Then I had further failures. All were resolved by changing the belt. My 2cents.

Marc
 
mjs1 said:
Hi Vincent D and rasenthiran. When I first got my used X911 DG the DAC didn't work, nor did the other settings work consistently. Then I had further failures. All were resolved by changing the belt. My 2cents.

Marc
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Thanks Marc,
That's encouraging to hear. I'm in Melbourne Australia and I've never been able to find anyone who I could trust to work on my treasured Sansui equipment. because of this I've fitted belts to a turntable, a few tape decks and about two years ago I fitted an elastic band to a Sansui CDP which has been singing away ever since. So I'm hoping the belt replacement will fix the problem, and that its something that I can do myself.
 
High Vincent . I suspect your source selector is in need of service. If the light of the other source selected lights up and then all going off it means two things. Either the belt is there but slips on the wheel , or the belt is cut . Either way you have to disassemble the back of the unit , remove the right channel block to get access to the selector , DAMS SANSUI called it. (direct access mechanical switch). AKER KEVZEP is in Australia I suppose he can help you.
 
Hi Vincent,

I have done the disassembly (a couple of years ago) of one of these for the belt replacement for a friend, he took it and fitted a new belt (one he had for a tape cassette that was the right length) and then he did the reassembly. Worked fine. Form memory it was not too difficult to get access. If you can measure the belt length (loop some fine string or cotton thread around the pulleys and mark the length, then measure it). There is at least one place in Australia where you can get a wide selection of belts, once the length is known then a belt can be selected. If you were in Sydney I would offer to help you out with the dissassembly and belt selection sourcing.

Cheers

John
 
JOMARK911 said:
High Vincent . I suspect your source selector is in need of service. If the light of the other source selected lights up and then all going off it means two things. Either the belt is there but slips on the wheel , or the belt is cut . Either way you have to disassemble the back of the unit , remove the right channel block to get access to the selector , DAMS SANSUI called it. (direct access mechanical switch). AKER KEVZEP is in Australia I suppose he can help you.
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Thanks for getting back to me John. I just put AKER KEVZEP into Google and got nothing. Anyway, as you say, it looks like that belt is going to be the problem. I'm going to try and replace it myself. I was printing the service manual, and half way through my printer broke down, Is there anything in particular that I should be wary of when disassembling the Amp? any hints you can give me will be greatly appreciated.
 
skippy124 said:
Hi Vincent,

I have done the disassembly (a couple of years ago) of one of these for the belt replacement for a friend, he took it and fitted a new belt (one he had for a tape cassette that was the right length) and then he did the reassembly. Worked fine. Form memory it was not too difficult to get access. If you can measure the belt length (loop some fine string or cotton thread around the pulleys and mark the length, then measure it). There is at least one place in Australia where you can get a wide selection of belts, once the length is known then a belt can be selected. If you were in Sydney I would offer to help you out with the dissassembly and belt selection sourcing.

Cheers

John
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Hi John,
Thanks for the offer of help. From what you say I think I should be capable of replacing the belt. I'm hesitant to start taking it to bits, as it sounds so good on "Source Direct" with CDs, but at the end of the day, although I have many Sansui Amps, It would be a bit strange to have to to use two different Amps in one system just to be able to play all sources.
 
Vincent D said:
Thanks for getting back to me John. I just put AKER KEVZEP into Google and got nothing. Anyway, as you say, it looks like that belt is going to be the problem. I'm going to try and replace it myself. I was printing the service manual, and half way through my printer broke down, Is there anything in particular that I should be wary of when disassembling the Amp? any hints you can give me will be greatly appreciated.
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When I wrote AKER KEVZEP I meant a member here in AUDIOKARMA , his nick name is kevzep. I see skipy 124 offered to help , although he's a bit far from you.
 
Also bare in mind , it's a bit complicated work to disassemble , get the dams pcb in hand clean the area of pcb below the gears change the belt and readjust the tension on the gears , and put it back , if you haven't done it before.
 
JOMARK911 said:
Also bare in mind , it's a bit complicated work to disassemble , get the dams pcb in hand clean the area of pcb below the gears change the belt and readjust the tension on the gears , and put it back , if you haven't done it before.
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John,
That sounds a bit daunting..............OR............ Challenging.........:rflmao:. I'll take lots of photos when I'm doing it and label all the screws and parts. would it be a good idea to discharge the Capacitors? and what's the best way to do that? Thanks again John.
 
Vincent,

I am actually running the same setup as yours,did you compare the sound from Marantz cd 63 KI and sound from your AU X911DG dac? May be you can give some view on the difference of both,which one you prefer more.
 
Vincent D said:
John,
That sounds a bit daunting..............OR............ Challenging.........:rflmao:. I'll take lots of photos when I'm doing it and label all the screws and parts. would it be a good idea to discharge the Capacitors? and what's the best way to do that? Thanks again John.
Click to expand...

Ok when you're ready to open it up take some photo's and i'll guide you through.
 
rasenthiran said:
Vincent,

I am actually running the same setup as yours,did you compare the sound from Marantz cd 63 KI and sound from your AU X911DG dac? May be you can give some view on the difference of both,which one you prefer more.
Click to expand...

Hi Raj,
My 63 KI is stock, I have never used any of the mods, so I usually run it through the Dacmagic 1 (which I see you have also) as I feel this gives it a more Analogue sound, If you know what I mean. But after trying it on "Digital Direct" with either a coaxial or optical interconnect, I was very surprised to find that the sound just opened up, the depth and width of the soundstage is just better than anything I have ever heard. Its a fuller, lush kind of sound, hard to describe, but if I had to describe it in one word, I would say "Better". I tried my Marantz CD17 mark 2 Ki, and my Arcam CD73 which being much more expensive players, should have sounded even better, but they both sounded almost the same as the 63 KI, slightly different, but not better. So I'm really not sure if this proves just how good the legendary CD 63 SE KI is, on its own, straight out of the box with no mods, OR, could it be that I am seeing the uppermost limitations of the 911s DAC? I do suspect that my other CDPs could do better, but that they both exceeded the ceiling of the 911s DAC. The only conclusion I can reach, is that the 911s Dac rises above the 63 KIs dac, just enough to elevate it from being an already great sounding player, to being an outstanding sounding player. Incidentally, I tried a few different speakers in the set-up including my B+W 705s, but I settled on a pair of Sansui EX series speakers which I found locally, and painstakingly restored to their original condition. I can find nothing on the net about these particular speakers, there is another EX series speaker on there, but not this one. The cabinets are huge and very deep, Its a three way design with 13 inch woofers and a wonderful sound. The sonic adventure continues...............
 
Hi Vincent,

Thanks for your information. i was also using the 63 KI and also the cambridge audio dac magic,but as you said,coaxial connection from the CD 63 KI to the Digital Direct of AU X911DG does show noticeable improved difference. I may later pass the DAC Magic to my brother if the Sansui perform better. The main advantage of the Dac Magic is the USB out and it can process till 128khz.
 
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