|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
81.203.61.236
HelloI'm having problems with my Nakamichi 480.
summarizing: Supply pinch roller assembly is pushed out by spring.
Please, Have a look at the image below.
When I insert the axis into the hole, everything works right. Tape travelling seems estable
and accurate. But after some play-stop iterations, the spring pushes out the part marked
with three green dots. This part is attached to the part labelled 'axis' which is the one
that rotates every time the pinch roller is pushed to the capstan. AS a result the spring
pushes out the whole assembly, misaligning the pinchroller guide and producing the disaster.I thought that the axis would be a firm part that wouldn't move when pushing the pinch roller
to the capstan. The three green dots part would rotate over the axis, the whit cap above
the axis would stop this part if it would be free from the axis. But, I've seen that the
axis firmly attached to the three green dots assembly and turns every time the deck changes from play to stopYou can see the take up pinch roller mounted and the supply one dissasembled.
How can I fix this?? Any Idea?
Thanks
Follow Ups:
Yes.
I downloaded the service manual, had a look at it and my belief was true. There's a pic that shows that the axis can be separated from the pinch roller assembly block.Belive me. It was hardly attached to it. I took the axis with the pincers (?) and turned it. I have now a little of pain in my hands due to the force I did. The take up axis was much more strongly sticked to the assembly.
I cleaned everything and lubricated.
Now the axis have been inserted into the holes, they do not move at, all
the assembly and the pinch rollers move freely.
tomorrow I will check the device.Good night from spain.
Suggest you look at the back side of the take-up capstan pinch roller assemby and compare it to the other assembly, both are the same and you might be missing or have a broken part. I have worked on several 480s and I hate this transport. This is the curse of front loading vertical decks, TOO MANY FREAKING PARTS! As the electrical performance increased the reliability of the the transports decreased. Impractical if not impossible to repair, too many plastic parts. 600s RULE!
In this context, why do 600's rule?
I'm sure this will cause some comments but here goes. I love the old sliding metal part transports, no plastic, in horizontal or semi horizontal decks. The 600s use one belt, one motor. I can get just as good W&F and speed accuarcy as any multi-belt, multi-motor transport. Yes, the electronics may not be as good but these machines are a cinch to align and are bullet proof. As much as I love them, they are just cassettes and I understand their limitations, still better than a lot of digital, that's why Nak 600s are just fine for me. My preference is the 600II, better head than a 600, easier to adjust and better user controls.The only down- side as with all older decks, you can't record on metal tape. No problem, I have a DR-8 That is working good, knock on wood. So that's my story.
I suppose If you can record on a three head nakamichi deck and then play on the 600II then the fact that you can't monitor the recording on the 600II real time doesn't matter.
Type 4 vs Type 2 tapes on a well set up deck - little difference, especially with my ears!
Easier to maintain - a big bonus.
Purchase price - a big bonus.
Availability of spares - hit and miss.
Overall - a good choice of deck I'd say.
hopefully you can fix the issue!!!
Is there a thread in the end of the post that locates in the hole? It looks like something has unscrewed itself from the other end once its located?
Thanks for your suggestionBut the fact is that the axis is completely cilindrical at its end. Its not possible to screw it into the hole. nor it has marks to be holded with anything.
What holds the post in the hole for the take up roller assembly?
Good.
This post is made possible by the generous support of people like you and our sponsors: