UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Aiwa NSX-AV75

RissyMcG · 5th Dec 2017, 10:30 am

So i've mostly cleaned up my pulley's now. And i've received what i'd hoped was the actual necessary belt kit from an ebay seller for this tape deck (although it was advertised appropriate for other hifi tape decks, not mine (but still Aiwa). I went for it because his pictures looked identical practically, when compared to my tape deck assembly.

His pictures: http://www.dealsan.co.uk/buy/aiwa-cassette-deck

From his ebay shop: https://www.ebay.co.uk/itm/202123771...107&rmvSB=true

Here's another link to a similar stereo which appears to have the same design of tape deck as mine: http://repaircafe.shoutwiki.com/wiki...ystem_NSX_D707

The actual Aiwa NSX-AV75 service manual page (51) showing the exploded diagram of the tape deck with belt routing:

https://www.manualslib.com/manual/69...page=51#manual

(IGNORE pulley's 5 and 6 as these are much lower down and i'm happy with these two)

So the problem i've got, as i've illustrated hopefully clearly enough in the following photos, is that this apparent belt routing doesn't work well as there are two belt pulleys on the motor. The lower groove on the motor lines up perfectly in the Z-axis with pulleys 1, 2, 4, 7 and the lower groove only on pulley 3. The upper groove on the motor pulley lines up perfectly in the Z-axis with the upper groove on pulley 3 ONLY.

BUT, i'm supposed to be putting the TWO belts around the pulleys as illustrated in the specified picture , whereas i can only see it working with THREE belts as illustrated in the proposed picture...!?

The reason for this is, with only TWO belts, and having to use the upper pulley on the motor for the pulleys to the right hand side (3, 4 and 7), means that the belt would be having to be angled down from the motor to both pulleys 3 and 7. To 7 isn't such a big deal, as it's so far away, so the apparent angle isn't alarming, but between the motor pulley and pulley 3, it's much more severe and IS alarming! I think it wont last long before it either slips or gets stressed out with friction.

Because of this concern (and confusion), i've come up with the alternative THREE belt routing as mentioned.

So i'm basically looking for some comments or concerns, or indeed, if anyone has a hi-fi similar to this one, with this same tape deck assembly in it, if they can advise how theirs is routed, as this stumps me. I can never see it working as per the design!?

5th Dec 2017, 10:30 am	#14
RissyMcG Triode Join Date: Oct 2017 Location: Rugby, Warwickshire, UK. Posts: 17	Re: Aiwa NSX-AV75 So i've mostly cleaned up my pulley's now. And i've received what i'd hoped was the actual necessary belt kit from an ebay seller for this tape deck (although it was advertised appropriate for other hifi tape decks, not mine (but still Aiwa). I went for it because his pictures looked identical practically, when compared to my tape deck assembly. His pictures: http://www.dealsan.co.uk/buy/aiwa-cassette-deck From his ebay shop: https://www.ebay.co.uk/itm/202123771...107&rmvSB=true Here's another link to a similar stereo which appears to have the same design of tape deck as mine: http://repaircafe.shoutwiki.com/wiki...ystem_NSX_D707 The actual Aiwa NSX-AV75 service manual page (51) showing the exploded diagram of the tape deck with belt routing: https://www.manualslib.com/manual/69...page=51#manual (IGNORE pulley's 5 and 6 as these are much lower down and i'm happy with these two) So the problem i've got, as i've illustrated hopefully clearly enough in the following photos, is that this apparent belt routing doesn't work well as there are two belt pulleys on the motor. The lower groove on the motor lines up perfectly in the Z-axis with pulleys 1, 2, 4, 7 and the lower groove only on pulley 3. The upper groove on the motor pulley lines up perfectly in the Z-axis with the upper groove on pulley 3 ONLY. BUT, i'm supposed to be putting the TWO belts around the pulleys as illustrated in the specified picture , whereas i can only see it working with THREE belts as illustrated in the proposed picture...!? The reason for this is, with only TWO belts, and having to use the upper pulley on the motor for the pulleys to the right hand side (3, 4 and 7), means that the belt would be having to be angled down from the motor to both pulleys 3 and 7. To 7 isn't such a big deal, as it's so far away, so the apparent angle isn't alarming, but between the motor pulley and pulley 3, it's much more severe and IS alarming! I think it wont last long before it either slips or gets stressed out with friction. Because of this concern (and confusion), i've come up with the alternative THREE belt routing as mentioned. So i'm basically looking for some comments or concerns, or indeed, if anyone has a hi-fi similar to this one, with this same tape deck assembly in it, if they can advise how theirs is routed, as this stumps me. I can never see it working as per the design!? Attached Thumbnails Last edited by RissyMcG; 5th Dec 2017 at 10:41 am.