Updated 16 December 2014


The BleusNak 680ZX Project
Rehab & Maintenance of a Legendary Nakamichi Cassette Deck




Above is a photo of the Nak 680ZX partially undressed. Preliminary evaluation of the insides about to commence.
Refer to the BleusNak CyberSpot main page for additional info on this deck and other Nakamichi cassette decks.







Photos above of the 680ZX partially disassembled on the bench, being prepared for initial
cleaning, component parts evaluation and flywheel belt inspection / replacement.


As the project continues, including expert assistance from a good friend and pro technologist, we will post photos showing progress of the BleusNak 680ZX cassette deck rehabilitation. We hope that this page of photos and explanations will intrigue and help you understand what goes on inside of a classic Nakamichi cassette deck. Enjoy the view, ask questions if you wish!




A view of the cassette bay with partial transport frame pieces removed to allow inspection of reel hubs erase, record & playback
heads, and head adjustment mechanism. That's how clean and dust-free your cassette deck transport should appear !!!



Above photo is a glimpse of the 680ZX flipped over and stripped open to reveal array of adjustment controls,
plus a view of the bottom solid-state preamp circuit boards and wiring harness. A lot of electronic components
packed into the inner frame of this deck, as is common for classic Nakamichi decks!

Also there is a clear view of the critical capacitor and preamp circuit boards. Note the orange colored capacitors,
often these little orangies are the cause of audio output performance problems due to age and leakage.
That's where reference to the term electronic capacitor 'Orange Cap Disease' (OCD) originates.




Big work tearing down, diagnosing, adjusting, replacing, testing and reassembling a rig as sophisticated as the Nak 680ZX cassette deck. The photo shows use of the Nakamichi Tilt Check Gauge in operation. This gauge checks correct tilt of the three magnetic heads.

(oops, this is a photo of a Nak ZX-9 tilt gauge procedure - to be replaced)

This maintenance adjustment is as essential as azimuth or other key alignment procedures. After doing this tilt gauge adjustment and verification, the head top surface will be perfectly parallel to the tape surface. Since play and record heads are floating independently in a Nakamichi deck, this step ensures tape path movement is ideal and correct for tape record and playback performance.


Chronological status of project activities & replacement parts cost will be posted here.......

For those that are seeking expert advice and technical services for Nakamichi 680ZX and other cassette decks,
contact Willy Hermann Services in the San Francisco, CA metro region in USA:

Introducing Willy Hermann Services

Future BleusNak project ~ Rehabbing the most exhalted and esteemed
Nak 550 Versatile Recording System Components, which is being planned for sometime during year 2016.





Welcome to the Mohican Pass basement vault!

Return to KJ Bleus' Nakamichi CyberSpot


Created 26 March 2014
Updated 16 December 2014

Email: BleusNak Studios, Ltd

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