I am part way through a repair on one of these too and just wanted to share some knowledge regarding removing the transport. Mine was also stuck to the bottom and difficult to remove but I found a trick that helped me slide out the transport: As per the video: 1. Remove the two screws from the bottom and the two bolts at the top rear. 2. Remove the caps on the tape control keys. The trick: 3. With the control key caps removed, there is a gap between the keys that is wide enough to wedge a flat blade screwdriver between. 4. Wedge the screwdriver between each gap and gently pry upwards. In my case, this was enough to sufficiently lift the transport from the adhesive to a point were I could pull it out toward the rear of the unit.
Hi Dave, Thanks a lot for doing this video. I've got an NAD 6100 cassette deck that needs a replacement belt. I was only able to find one belt for it, but I suspect that once I take it apart, it'll need more than the one belt I already have. Your video gave me an idea of what I'm in for. Regards, Tom
Very useful thanks. Helped me to work out how to get to the belts on my NAD 6050C deck which seems to have the same mechanism but slightly easier access👍
I recently did some work on an Aiwa AD-F260 I got and after seeing this I'm sooo glad the mechanism in mine was screwed down only. Four screws and the whole mechanism was out; wires were also plugged into the main board instead of soldered. The belts were actually okay, only the counter belt needed replacing. Only reason why I had to take it apart was to replace the pinchroller, which was skewing the tape
Thank you for the video. I got a NAD 614 that needs new belts too - will see if the course of action is the same (or at least, in some degree similar) as for your 6155
Smashing job :-D, sounds spot on and should last a hell of a long time now. I've taken on some nightmare tape deck repairs when i was younger. So many belts to get in place, i had to stick the tip of my tongue out of the side of my mouth to successfully jiggle the parts all into place :-D Dam record/play mode switch!, Often faulty and spraying it did no good, dissasembly and the sliders and plates were cleaned manually. They always had a black muck all over the contacts. All fun :-D
Thanks for the great video. I have an old 6155 in a box that needs new belts. Ironically, I don't own any cassettes anymore. This video convinced me just to toss the deck on trash day and save myself a major headache :) P.S. I still own two NAD 2200's, preamp, tuner, all from the late eighties. Still sound good.
Great Video, Working on a 6050c at the moment. Removed mass of soft rubber from capston wheel with long wooden pick. Used Methalated spirits on a swab with the motor running to clear the rest. You can measure missing belts by using a length of string, and marking point of crossing with a fine ink pen. I made one mistake, used a ling blade against the capstan wheel whilst motor running to remove some fibres from the swab. There were some sparks and the motor stopped! Cant see what I had shorted, but I blew the 500ma fuse under the board. ++ Do we have actual sizes for the belts? ++
Great work on a bear of a unit! Found your video while prepping to do the same belt changes on a NAD 6155. I actually found myself laughing out loud about 12 minutes in wondering how many ways I would have botched the job without your guidance. THANKS!!
sorry to be off topic but does any of you know a trick to get back into an Instagram account? I was dumb forgot the account password. I would appreciate any tips you can offer me.
@Dexter Kash I really appreciate your reply. I found the site thru google and I'm waiting for the hacking stuff now. Looks like it's gonna take quite some time so I will reply here later when my account password hopefully is recovered.
And I thought this deck had a record relay instead of the old r/p switch plus a pita to change the belts. I thought the Nakamichi rx-202 was tough. Well the idler tire wasn't a cakewalk. Never owned a NAD but heard good things about them. Good detailed video!
Could anyone tell me what the sizes of the individual belts are please?I need to order some in the UK. Great video,very useful and helpful,thank you so much.
I'm in the middle of repairing one of these now. Unfortunately, one of the blue wires came unattached while maneuvering the cassette mechanism. So this should be fun finding the soldering point. Ugh.
Looks more heavy duty, yeah a lot screws and nuts. The recording level potentiometer (green) seems to be high quality sealed unit. Was the belt kit from MARRS ?
I am not experienced in Belt change but did it on my AIWA AD WX707 and it was also a nightmare for me. If I remember correctly I had to solder off the motordriver board to get to the guts. That Belt set was a whopping 18$ on Egay, damn.
It is absurd to change the belt on such a simple 2 head deck. I wonder what these engineers were think about. I'm glad you were able to repair it. I am proud to say that I changed the belt on a BIC T-4M ;)
I have a 6325 from my late father in law and after seeing what is involved in changing just the main motor to flywheel belt, couldn’t they have designed it better for a much simpler repair?
Some people think only modern devices are designed to be so cost ineffective to service the customer will just buy new instead. But the trend started a generation ago as we can see here.
Wow, what a PIA! Is this the worst belt repair you've done? Congrats on your 70K subs, I remember when you were just a couple hundred! I'm not a fan of Dutch angles, but it did work perfect for that shot...plus great blocking and the pacing in general in this video was 5/5 OM! ~Jack, VEG
No the worst was a nakamichi dragon. Once bitten..... Never again. Technics have some nasty mechanisms as did aiwa. This one was actually not bad. Bose 3 cd wave radio changers are a pain in the but too and I have one of those pos coming in.
Wow, nice job ! This is a patience test you succeeded: too many screws, cord and pulley, buttons caps... to access 4 belts!!! This deck seems a pretty good part of equipment, with a full metal deck, a nice and well populated PCB, but it's poorly designed with this complicated procedure. A few connectors are not so pricey they could have helped access without risk of tearing things apart... If you compare with most JVC or Sony deck: 4 screws and 5 connectors and the mechanism is ready to service! NAD was said to be conceived and designed in England... I believe in that case most engineers can do far better. When I was selling these NAD and Rotel, they were said to give priority to sound quality at the detriment of what they qualified gadgets, but there's apparently something more lost or neglected. This confirms as many of these equipment seem not maintenance friendly. Never Ask to Dismantle? In last resort, I think we can ask you?
One of the reasons they used to say they didn't place connectors was that was a point of distortion and they were of course striving for sonic quality. Normally these are not as bad. I don't know if something was spilled in the unit or it was glue but the mech wouldn't slide out. Nowmally it is 2 screws on the bottom the 2 bolts on the top and remove the button caps and it slides out.
@@12voltvids Aren't the these decks using the essentially similar Sankyo Transports that Nakamichi used on say the BX series decks? They are stupid simple to get out, two screw at the top, and 2 screws at the bottom and 4 connectors (I think if memory serves) and voila, the transport is out for service. I have the BX 100 myself and would love to get a three header, either the NAD 6300 or Nakamichi BX 300 myself. :-)
The background music is really not necessary. It is a distraction that I try to block out. It seems to get louder when Dave is talking too. Otherwise, an excellent video to add to my collection. I recently bought a high torque electric screwdriver and it came with several JIS bits, including Dave's favourite "0”. It was reasonably cheap too.
Agreed... Background music bs doesn’t do anything but detract from the video... some people will never get it though.
Před 4 lety
you must have a compressor limiter pushing your volume levels to all peak gain..the music was extremely light on this video. He rarely has music going through the whole thing. What is it you're having a difficult time with? Maybe get your ears checked for bugs living inside . 😂
Not an issue here, but I don't generally watch YT on my phone or laptop's crappy speakers anyway, but a full blown desktop with much better speakers and he keeps it at a very, very low bed level and it's the music he's chosen that has the occasional peaks. I had no issues either, granted, he does not always use bedded music, but since he pauses talking a lot as he dissembles, music keeps the sound moving without a lot of silence is why it's there.
@ Music is added because there was not much talking going in and the levels were peeking at -20db where the program audio was going to -1. It was not on auto level. The vast majority like it and that is why it is there. In the past month I have had over 200 messages on other videos that have music in the background telling me how much better it is with background music.
I was waiting for this question. It is to reduce interference from the magnetic flux that radiates around the transformer pwependictular to the core. Same reason on tube audio amps the power and output transformers are 90' rotated.
@@petertryndoch8857 Toroidal transformers are actually more efficient and they have low noise and electromagnetic interference so it is a win win for audio applications despite the higher manufacturing costs.
It's a 2 head deck. As soon as you put it in record, the bias oscillator comes on and puts a high voltage AC bias on both the record/play head and erase. This instantly neutralizes any magnetic residue on the heads. Demagnetizing is only required for playback heads.
@@LifeSized101 Your left level being low could be a few things. A worn head is one. A dirty head is another. Weak pressure spring in the cassette or even a worn pinch roller that is pulling the tape at an angle and causing it to skew off the head. And of course head alignment.
... or you can just back-off the plastic set screw holding the flywheel in place and fish all the belts in without removing the transport system at all ...
Wow! I've got a couple of JVC D66's to do! Haven't had my hand in this for many years!! Probably when they were making them in the factory!! Thanks!
Great service Dave crazy design have take button caps off get machine apart look forward nx video keep coming across old videos haven't watched 👍
Amazes me how you get these things back together.
That is many years of practice. Remember I used to do this for a living. From 1983 to 2003 I made a living servicing consumer electronics.
I am part way through a repair on one of these too and just wanted to share some knowledge regarding removing the transport. Mine was also stuck to the bottom and difficult to remove but I found a trick that helped me slide out the transport:
As per the video:
1. Remove the two screws from the bottom and the two bolts at the top rear.
2. Remove the caps on the tape control keys.
The trick:
3. With the control key caps removed, there is a gap between the keys that is wide enough to wedge a flat blade screwdriver between.
4. Wedge the screwdriver between each gap and gently pry upwards.
In my case, this was enough to sufficiently lift the transport from the adhesive to a point were I could pull it out toward the rear of the unit.
Hi Dave,
Thanks a lot for doing this video. I've got an NAD 6100 cassette deck that needs a replacement belt. I was only able to find one belt for it, but I suspect that once I take it apart, it'll need more than the one belt I already have. Your video gave me an idea of what I'm in for.
Regards, Tom
Very useful thanks. Helped me to work out how to get to the belts on my NAD 6050C deck which seems to have the same mechanism but slightly easier access👍
I recently did some work on an Aiwa AD-F260 I got and after seeing this I'm sooo glad the mechanism in mine was screwed down only. Four screws and the whole mechanism was out; wires were also plugged into the main board instead of soldered. The belts were actually okay, only the counter belt needed replacing. Only reason why I had to take it apart was to replace the pinchroller, which was skewing the tape
What a palava to replace a few belts !! you must have the patience of a saint
Thank you for the video. I got a NAD 614 that needs new belts too - will see if the course of action is the same (or at least, in some degree similar) as for your 6155
Smashing job :-D, sounds spot on and should last a hell of a long time now.
I've taken on some nightmare tape deck repairs when i was younger.
So many belts to get in place, i had to stick the tip of my tongue out of the side of my mouth to successfully jiggle the parts all into place :-D
Dam record/play mode switch!, Often faulty and spraying it did no good, dissasembly and the sliders and plates were cleaned manually.
They always had a black muck all over the contacts.
All fun :-D
Thanks for the great video. I have an old 6155 in a box that needs new belts. Ironically, I don't own any cassettes anymore. This video convinced me just to toss the deck on trash day and save myself a major headache :) P.S. I still own two NAD 2200's, preamp, tuner, all from the late eighties. Still sound good.
Sell it to some sucker that thinks cassettes are coming back.
You saved my day
Great Video, Working on a 6050c at the moment. Removed mass of soft rubber from capston wheel with long wooden pick. Used Methalated spirits on a swab with the motor running to clear the rest. You can measure missing belts by using a length of string, and marking point of crossing with a fine ink pen.
I made one mistake, used a ling blade against the capstan wheel whilst motor running to remove some fibres from the swab. There were some sparks and the motor stopped! Cant see what I had shorted, but I blew the 500ma fuse under the board.
++ Do we have actual sizes for the belts? ++
Great work on a bear of a unit! Found your video while prepping to do the same belt changes on a NAD 6155. I actually found myself laughing out loud about 12 minutes in wondering how many ways I would have botched the job without your guidance. THANKS!!
sorry to be off topic but does any of you know a trick to get back into an Instagram account?
I was dumb forgot the account password. I would appreciate any tips you can offer me.
@Chad Samson instablaster ;)
@Dexter Kash I really appreciate your reply. I found the site thru google and I'm waiting for the hacking stuff now.
Looks like it's gonna take quite some time so I will reply here later when my account password hopefully is recovered.
@Dexter Kash it did the trick and I now got access to my account again. I am so happy:D
Thank you so much you saved my ass !
@Chad Samson you are welcome xD
And I thought this deck had a record relay instead of the old r/p switch plus a pita to change the belts. I thought the Nakamichi rx-202 was tough. Well the idler tire wasn't a cakewalk. Never owned a NAD but heard good things about them. Good detailed video!
just too good thank you sirr
Hi... you did an excelent work! Is this the same method for the 6325 deck? Thanks.. your channel is full of such a great info
Could anyone tell me what the sizes of the individual belts are please?I need to order some in the UK.
Great video,very useful and helpful,thank you so much.
Hello, great video! Trying to replace the belt on my NAD 6340, would the same amount of dismantling be required as this model in your video? Thanks
I really don't remember because that was awhile ago that I did this and I don't know all the models of nad.
Great job! Tks
Where did you take the oscilloscope reading from -where were your leads attached please great vid😊
This is what I have to look forward to! Eeek !!
I'm in the middle of repairing one of these now. Unfortunately, one of the blue wires came unattached while maneuvering the cassette mechanism. So this should be fun finding the soldering point. Ugh.
Looks more heavy duty, yeah a lot screws and nuts. The recording level potentiometer (green) seems to be high quality sealed unit. Was the belt kit from MARRS ?
Great work as usual. I learned several things from this video. But unfortunately one of them was to NEVER buy a secondhand NAD cassette deck.
That can be said for most second hand electronics from the 80s. Most are totally worn out.
I am not experienced in Belt change but did it on my AIWA AD WX707 and it was also a nightmare for me. If I remember correctly I had to solder off the motordriver board to get to the guts. That Belt set was a whopping 18$ on Egay, damn.
It is absurd to change the belt on such a simple 2 head deck. I wonder what these engineers were think about.
I'm glad you were able to repair it.
I am proud to say that I changed the belt on a BIC T-4M ;)
As far as I'm concerned there shouldn't be any belts in tape decks anyway they should all be direct drive like my JVC TDR 1010 are my technics rsm275.
@@12voltvids I wonder why manufacturers didn't make all decks Direct drive, probably cost efficient!
I have one of these units... I understand they are quite desirable ... what does NAD stand for?
New Acoustic Dimension
Nasty Ass Distortion!
I have a 6325 from my late father in law and after seeing what is involved in changing just the main motor to flywheel belt, couldn’t they have designed it better for a much simpler repair?
Some people think only modern devices are designed to be so cost ineffective to service the customer will just buy new instead. But the trend started a generation ago as we can see here.
Full belt replacement procedure, lol, did it survive?
It ended up in the covid ward for awhile
Did they demontize you again? I have not been seeing any ads.
I just got 2 before the video started.
Nice
i am surprised , you have a very good experience in repairing these systems , can i be your assistant.?
Wow, what a PIA! Is this the worst belt repair you've done? Congrats on your 70K subs, I remember when you were just a couple hundred! I'm not a fan of Dutch angles, but it did work perfect for that shot...plus great blocking and the pacing in general in this video was 5/5 OM! ~Jack, VEG
No the worst was a nakamichi dragon. Once bitten..... Never again. Technics have some nasty mechanisms as did aiwa. This one was actually not bad. Bose 3 cd wave radio changers are a pain in the but too and I have one of those pos coming in.
Wow, nice job !
This is a patience test you succeeded: too many screws, cord and pulley, buttons caps... to access 4 belts!!!
This deck seems a pretty good part of equipment, with a full metal deck, a nice and well populated PCB, but it's poorly designed with this complicated procedure. A few connectors are not so pricey they could have helped access without risk of tearing things apart...
If you compare with most JVC or Sony deck: 4 screws and 5 connectors and the mechanism is ready to service!
NAD was said to be conceived and designed in England... I believe in that case most engineers can do far better.
When I was selling these NAD and Rotel, they were said to give priority to sound quality at the detriment of what they qualified gadgets, but there's apparently something more lost or neglected. This confirms as many of these equipment seem not maintenance friendly.
Never Ask to Dismantle?
In last resort, I think we can ask you?
One of the reasons they used to say they didn't place connectors was that was a point of distortion and they were of course striving for sonic quality.
Normally these are not as bad. I don't know if something was spilled in the unit or it was glue but the mech wouldn't slide out. Nowmally it is 2 screws on the bottom the 2 bolts on the top and remove the button caps and it slides out.
@@12voltvids Aren't the these decks using the essentially similar Sankyo Transports that Nakamichi used on say the BX series decks? They are stupid simple to get out, two screw at the top, and 2 screws at the bottom and 4 connectors (I think if memory serves) and voila, the transport is out for service. I have the BX 100 myself and would love to get a three header, either the NAD 6300 or Nakamichi BX 300 myself. :-)
Dla mnie NAD zawsze grał ciemnmo . Każdy sprzęt .
Wow. That makes me feel sick with anxiety!
The background music is really not necessary. It is a distraction that I try to block out. It seems to get louder when Dave is talking too. Otherwise, an excellent video to add to my collection. I recently bought a high torque electric screwdriver and it came with several JIS bits, including Dave's favourite "0”. It was reasonably cheap too.
Agreed... Background music bs doesn’t do anything but detract from the video... some people will never get it though.
you must have a compressor limiter pushing your volume levels to all peak gain..the music was extremely light on this video. He rarely has music going through the whole thing. What is it you're having a difficult time with? Maybe get your ears checked for bugs living inside . 😂
Not an issue here, but I don't generally watch YT on my phone or laptop's crappy speakers anyway, but a full blown desktop with much better speakers and he keeps it at a very, very low bed level and it's the music he's chosen that has the occasional peaks. I had no issues either, granted, he does not always use bedded music, but since he pauses talking a lot as he dissembles, music keeps the sound moving without a lot of silence is why it's there.
@
Music is added because there was not much talking going in and the levels were peeking at -20db where the program audio was going to -1. It was not on auto level. The vast majority like it and that is why it is there. In the past month I have had over 200 messages on other videos that have music in the background telling me how much better it is with background music.
@@12voltvids I don't mind the music at all myself. Once again, sensitive nitpickers will find something to cry about.
👍
Definitely NOT service friendly!
Does anyone know if there is a reason why power transformers are sometimes mounted at a 45deg angle?
I was waiting for this question. It is to reduce interference from the magnetic flux that radiates around the transformer pwependictular to the core. Same reason on tube audio amps the power and output transformers are 90' rotated.
@@12voltvids Thank you.
I guess that would also be the reason why Toroid transformers are popular in audio gear.
@@petertryndoch8857
Toroidal transformers are actually more efficient and they have low noise and electromagnetic interference so it is a win win for audio applications despite the higher manufacturing costs.
@@12voltvids Would it be a reasonable idea to remove those transformers entirely and supply the required internal power from an outboard source?
Yes I know I never want to try to work on those units
They are not that bad.
Wow..what a Pain !
Try doing a technics rsm275. Now that is a pain in the a55
what -no demagnetizing the heads after all that :D
It's a 2 head deck. As soon as you put it in record, the bias oscillator comes on and puts a high voltage AC bias on both the record/play head and erase. This instantly neutralizes any magnetic residue on the heads. Demagnetizing is only required for playback heads.
@@12voltvids interesting
Is this why my players have low left level ?
@@LifeSized101
Your left level being low could be a few things. A worn head is one. A dirty head is another. Weak pressure spring in the cassette or even a worn pinch roller that is pulling the tape at an angle and causing it to skew off the head. And of course head alignment.
Can clearly see why the guy said fuck this
... or you can just back-off the plastic set screw holding the flywheel in place and fish all the belts in without removing the transport system at all ...
500 screws later.....
Seems that was.
NEVER BUY NAD STUFF ??
NAD. No auditable distortion. Or Nasty and Distorted. You pick.
Adcom is more reliable, but more expensive, nad is good though
That's a 500 dollar repair
500 I wish. More like 50
Bardzo słabo nagrywa . Wysokie tony wcięło . Lipa .
Note to self, do not buy a Nad cassette deck...
Horrible deck to work on. No thanks!