Restoration Trials: Addressing the Aftermath of Unsuccessful Fixes on Nakamichi ZX-7
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- Опубликовано: 10 сен 2024
- Embark on a challenging restoration journey as we address the consequences of multiple unsuccessful repair attempts on the Nakamichi ZX-7. This episode showcases a painstaking process of identifying and rectifying issues, some of which were exacerbated by earlier, immature service attempts. The sheer volume of problems discovered necessitates further parts and extended efforts. This is a fascinating, albeit frustrating, glimpse into the realities of vintage audio equipment restoration. Stick with us on this challenging adventure!
Hi Hifiruleszzz. I've worked on so many of these machines. The cause of the fader going down during calibration is due to the orange caps in the erase head / bias generator circuit. The orange caps can cause so many illogical problems that you would not have thought these caps could cause. Or it could be that Frankenstein work done on the power supply section that's screwing up the voltages. I should watch the follow up video on this machine to see how you go.
Looks like this unit was in a hot climate as the nylon looks yellow on the transport
Another great video from the Master.
This should be interesting.
I just received your notification I ZX 7, I am watching it curiously.
I have a ZX7. It's normal behaviour that the left master fader llights up when starting the calibration mode
Thanks, I don't remember, I had one a while ago.
My favorite Spaghetti Incident deck! :) The only deck in the world able to calibrate an ABSOLUTE Azimuth for any cassette... it's a bit uncanny though how it does work seeing all the plastic gears involved. And I'd be very very tempted to try retrobriting that plastic.
The masterr at work
It is worth repair , big time , this is Reference deck , Ultimate both player and recorder . One of my favourite decks
@audio technika How reference deck can be a trash ?) Not this one for sure ) Trash is something which thrown away or given away for free . I would agree if ZX-7 were sold for few tens of euros or bucks ) They are not even in bad state )
the rec led blinking intermitently looks like something isn t making contact well.
I suspect half of the remaining problems are bad solder joints.
I also saw a missing diode at the beginning of the vid (around 3:16, D402, also missing a solder pad).
I believe it is a power undersupply issue, they installed a 1.5A IC on the +5V line when the original transistor keeps 3A.
amazing video . once a great recorder. can it survive the test of time? he's is in the hands of a Guru. right? cheers
Wow. That poor deck has a ton of issues. I wonder if it got hit by a power surge or something? Do you think you will be able to fix the logic board issues?
It seems it has connector issues to me.
вот хорошая съемка все видно.
WHERE ARE YOU like to send you my deck to change the belts and any other rubber stuff
PA