Nakamichi 680ZX Owners Manual

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Nakamichi 6802X

Discrete Head Cassette Deck
Owners Manual

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WARNING

TO PREVENT FIRE OR SHOCK
HAZARD, DO NOT EXPOSE
THIS APPLIANCE T0 RAIN 0R
MOISTURE.

Please record the Model Number
and Serial Number in the space
provided below and retain these
numbers.

Model Number and Serial Number
are located on the rear panel of the
unit.

Model Number: Nakamichi 6802X
Serial Number:

CONTENTS
Safety Instructions ............. 1
Controls and Features .......... 3

Precautions .......
Connections ......
Playback ..........
Recording ........
Special Features . . . .
Recommended Tape ............ 15
Record Head Auto Azimuth
Alignment and Record

Calibration ..................... 17
The Dolby System .............. 19
Maintenance ................... 21
Troubleshooting ................ 23

Specifications .................. 24

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Recommended Tape

Choosing a high quality recording tape
is extremely important. A sophisticated
cassette deck, like the 6802X. cannot

be expected to deliver superior
performance with inferior tapes. The
numerous brands and types of blank
cassettes on the market vary not only in
the consistency of the tape coating, but
in the degree of mechanical precision as
well. The performance of an otherwise
excellent tape is often marred by a poor
housing, which can result in skewing
and other unsteady tape travel
conditions

Nakamichi offers several premium
quality cassettes manufactured to the
strictest tolerances. These cassettes are
used at the Nakamichi factory for final

adjustments to the decks. Nakamichi
cassettes are what enable Nakamichi to
guarantee cassette deck specifications.
In addition to offering these reference
grade cassettes, Nakamichi maintains a
sampling program to evaluate the
performance of the market's most
popular cassettes. The table below lists
those cassette tapes which are
acceptable by Nakamichis standards.
Brands other than Nakamichi are listed
in alphabetical order. Since this list is
subject to constant updating, we
recommend you periodically write to
Nakamichi to obtain the most recent
test results. Nakamichi does not
recommend the use of 0-120 or
ferrichrome cassettes under fl
circumstances.

Tape and Eq Switch Settings
Brand Formulations
17/8 lps 15/16 ips
Tape Tape
5.x 5.x 1.x 5.x 5.x 1.x Nakamichi EX,EX'II
Ea Eq Fuji FX-l
12p 79 12,0 7_0 Maxell UD,UDXL-l
TD AD
Tape T699
5.x 5.x 2.x 5.x 5.x z_x Nakamichi SX
Ampex Grand Master II
Eu Ea Fuji FX-Il
igo 79 12p 79 Maxell UDXL-ll
TD 5
Tape Tape
E_X sx 2x 5x s_x 2.x
Ed Eq Others'
iao 79 12:0 79

'Most major tape manufacturers will be offering a metal formulation in 1979. Lack
of specific test data prevents listing by brand at this writing. Write to Nakamichi
for up-to-date information regarding metalloy cassettes.

15

Tape and Eq Switch Settings

The Tape and Eq selector switches on
the GBOZX permit you to choose from a
variety of tape formulations. The Tape
switch selects the proper bias and
record sensitivity for each cassette type.
The Eq switch gives you a choice of
record and playback equalizations to
optimize conditions for the type of tape
in use and the nature of the program
material to be recorded.

Eiasis an inaudible high frequency
signal used to reduce the non-Iinearities
and distortions inherent in the magnetic
recording process. Bias is applied only
during record, and, hence, the Tape
selector has no effect during playback.
Low-noiselhigh-output ferric oxide (or
modified ferric oxide) formulations, like
Nakamichi EX-Il require a certain bias
level, sometimes termed normal".
Chromium dioxide and chrome-
equivalent tapes, such as Nakamichi SX,
require approximately 45% more bias.
Metal tape formulations, such as
Nakamichi ZX, require almost twice the
bias of chrome-equivalents for
distortion-free recording. Your
Nakamichi 6802X has been factory
adjusted for Nakamichi EX-II, SX and
2X tapes in each of the respectively
marked Tape switch (21) positions. The
other recommended tapes are closely
compatible in their respective
categories.

Egualization is used in record and
playback to achieve optimum signal~to~
noise and headroom performance for
different tape formulations. Like bias,
the proper Eq switch (20) setting must
be selected for each type of tape. Unlike
bias, the Eq switch must be set for both
record and playback. Normally, you
would set the Eq switch according to
the table, but the excellent high
frequency performance of the Nakamichi
GBOZX permits unusual settings of the
Eq switch for special purposes: