Kenwood Fcd7 Manual

							3900 ANNAPOLIS LANE NORTH / PLYMOUTH, MINNESOTA 55447-5447 / PHONE: 763-577-9700  FAX: 763-577-0323
ModelReference CD7
CD PLAY E R - D I G I TAL TRANSPORT
Owner’sManual 
						

							Model Reference CD7
Model Reference CD7
SectionPage No.
Preface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Tube Installation Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,2
Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Power-up Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Shut-Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Front Panel Control Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Remote Control Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2, 3
CD Door Functions/Warnings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3, 4
Digital Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Analog Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Warranty Terms and Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
FCC Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 
						

							Model Reference CD7
InllIOII
D I S P L A Y
R E F E R E N C ECD PLAYERMODEL CD7 HIGH DEFINITION
®
PREVPLAYNEXTSTOPPA U S EP O W E R
B A L A N C E DB A L A N C E DA ES/E B UC O A X
R I G H T
S ES E
L E F T
ANALOG OUTPUTS
PLYMOUTH, MINNESOTA
MADE IN U.S.A.
12000 WATTS
MAXIMUM
50/60 HZ~
THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES
OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS:
(1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE. AND (2)
THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED INCLUDING
INTERFERENCE THAT MAY CAUSE UNDERSIRED OPERATION
MODEL CD7
VACUUM TUBE CD PLAYER
SERIAL
VOLTS
DIGITAL OUTPUTS 
						

							Preface
Please take the time to carefully read this instruction 
manual prior to installation or use of your Reference CD7
compact disc player. Because it is a highly advanced elec-
tronic instrument, there are several facts and procedures
you should know before you place it in operation.
Introduction
We believe the CD7 breaks new ground in the retrieval and
transmission of digital data from the CD format. In fact,
thats a large part of the fun: just as in the past, when a
new cartridge and tonearm combination brought music to
life with startlingly improved resolution, subtlety and 
dynamics, so too you will discover layers of musical infor-
mation you never knew were there in the mirrored surface
of the compact disc.
Whats the reason for this superior performance? Well, a
look inside the CD7 reveals a wealth of proven Audio 
Research design philosophy. Circuit boards are Audio 
Research engineered, with robust construction, careful
hand soldering and layouts optimized for lowest digital
noise. Sophisticated electronic “jitter stripping” techniques
help minimize jitter in the overall circuit. Advanced 
massive power supply design, with two transformers and
extensive regulation, has proved crucial even in digital 
applications like the CD7. The BNC and XLR digital outputs
are transformer coupled and are driven by a high-current
balanced line driver. Mechanical damping theory has also
been applied to internal mounting of key components and
to critical aspects of the transport and chassis structures 
(including tuned polymer feet), to minimize vibration-
induced noise.
Both the analog output stage amplification and the power 
supply regulation are all-tube and handled by a total of 
seven class A triode operation 6H30 vacuum tubes (four 
for the analog stage and three in the power supply).
A bitstream digital-to-analog converter and a high-current
pure class A analog output stage  allow the CD7 to be used
with a line-level preamplifier or integrated amplifier. Both
single-ended (RCA) and balanced (XLR) outputs are includ-
ed. Alternatively, the owner may use the CD7 as a high-
quality CD transport in conjunction with an external digital
processor. 
The CD drive mechanism itself represents the latest think-
ing from digital engineers, and offers performance clearly
superior to older drives. In part, this is because even the
servos of the CD7 drive operate fully in the digital domain,
whereas older transport models were actually hybrid 
designs using analog servos, which placed greater demands
on power supply reserves. The CD7 laser also has a 
superior eye pattern for more effective resolution of CD 
data and, again, lower jitter.
In appearance, the CD7 is pure Audio Research: heavy 
bevelled front panel, with handles flanking the controls on
the right and the readout display on the left. Both controls
and display readout are recessed within bevelled openings
for a more sculptured appearance. A convenient handheld
remote control of all front-panel functions and additional
functions is also included. 
On the rear chassis panel you will find BNC coaxial and
XLR digital outputs. (An RCA/BNC adaptor is included with
each unit.) Analog outputs include single-ended (RCA) and
balanced (XLR). 
Warnings
1.To prevent fire, or shock hazard, do not expose your
CD7 to rain or moisture.
2.This unit contains voltages which can cause serious 
injury or death. Do not operate with cover removed. 
Refer servicing to your authorized Audio Research dealer
or other qualified personnel.
3.The detachable power cord on your CD7 is equipped
with a heavy gauge, 3-conductor cable and a standard
three-prong grounding plug. For absolute protection,do
not defeat the ground power plug. This provides 
powerline grounding of the CD7 chassis to provide 
absolute protection from electrical shock.
4.For continued protection against fire hazard, replace the
fuse only with the same type and rating as specified at
the fuse holder.
5.Do not operate the CD7 player without the supplied
CD7 clamp installed on the CD.
6.Whenever the CD7 is powered up the door covering the
drive mechanism/tray area should remain closed after 
inserting or removing a CD, so as not to block the front-
most ventilated area of the top cover. Following this 
procedure will maintain proper ventilation and also mini-
mize dust intrusion on the lens and drive mechanism.
Packaging
Save all packaging in a dry place away from fire hazard.
Your CD7 compact disc player is a precision electronic
instrument and should be properly cartoned any time ship-
ment is made. You may not have occasion to return your
unit to the factory for service, but if that should prove 
necessary, or other occasion requiring shipment occurs, the
original packaging will protect your CD7 from unnecessary
damage or delay.
Model Reference CD7
1 
						

							Tube Installation Procedure
BEFORE OPERATING THE CD7:
Carefully remove each of the seven 6H30 vacuum tubes
from their protective foam blocks and install them in their
sockets on the circuit board, matching the “V” number on
the tube with each matching numbered tube socket. Note:
double damping rings are installed at the factory on each
tube for maximum sonic performance.
Installation Instructions
While the CD7 does not dissipate an unusual amount of
heat, it is important that it be provided with reasonable air-
flow to assure long, trouble-free operation. In addition, the
following installation guidelines will help insure maximum
sonic performance as well as reliable service.
1. Upright and level horizontal mounting is mandatory,
preferably on solid, non-resonant shelving. Allow suffi-
cient space for tube convection cooling. Do not block
the ventilation holes when the unit is turned on.
2. Do not stack the CD7 on top of another component: not
only could this cause overheating, but hum may be 
introduced into the system.
3. Do not place any objects on top of the CD7; its suspen-
sion feet are tuned for the specific weight of the CD7.
4. Do not place or operate your CD7 on a soft or 
irregular surface such as a rug. This can prevent proper
leveling and restrict ventilation 
5. Do not operate your CD7 without the top and bottom
covers installed. These are required both for safety 
as well as shielding from interference (except in service
operations by qualified personnel).
6. If side-by-side mounting with other equipment is 
employed, place the CD7 to the left of the other chassis,
so as to provide maximum spacing between the trans-
formers of the CD7 and the other component.
Power-up Procedure
Once plugged into the power receptacle, after the tubes
have been installed (see above), push the Power switch to
turn on the CD7. The central green front panel LED will
glow dimly for about a 40 second circuit warm-up interval
with the output automatically muted. When the LED glows
brightly, the CD7 is ready for operation.
Once powered up and operational, with the CD door fully
closed, the unit will default to the operate setting (display,
transport and front panel controls are activated).
Because the CD7 reaches its full sonic potential from “cold”
in a shorter warm-up time period than a solid state CD
player, it is recommended that the CD7 be powered down
for any extended time it is not in use. This will save on
tube life.
Shut-Down
1.Set preamplifier Mute switch to “Mute” position.
2.Press CD7 Power switch to turn off. 
Front Panel Control Functions 
(Functions in [  ] indicate labeling abbreviations appearing
on remote control unit.)
POWER O:The Power switch turns the CD7 completely on
for operation (indicated by the LED being brightly lit), each
time preceded by a warm-up interval of about 40 seconds
when the LED is dim and the output is automatically mut-
ed.
PAUSE II:Interrupts play (display will read “PAUSE”).
Release PAUSE by pressing it a second time to resume 
playing disc.
STOP :Stops play. (Number of tracks and total disc track
time appear on display.)
PLAY
l
:Starts play. CD door must first be fully closed.
Begins to play first track unless another is selected. Restarts
track if pressed during play. (Track number and elapsed
track time appear on display.)
PREV 
|n
:Selects the previous track to play. Continue
pressing to cycle backward through previous tracks. (Track
number will appear on display.)
NEXT
l|:
Selects the next track to play. Continue pressing
to cycle forward through tracks. (Track number will appear
on display.)
Remote Control Functions
The remote control unit includes all of the above described
CD7 front panel control functions plus the following 
additional functions.
0-9 BUTTONS:Pressing numbered button(s) corresponding
to the disc track number will advance disc to desired track.
Also used to select tracks when compiling a custom disc
playback program (see PROGRAM [PROG] function descrip-
tion below).
SCAN:With a stopped CD and the CD door closed, press
SCAN and the first 10 seconds of each track will be played
in sequence. (“SCAN” will light up on display, then 10 
seconds are counted out next to each track number.) To
hear a track in full that player is presently scanning, press
SCAN button again which will cancel SCAN function.
Model Reference CD7
2 
						

							PROGRAM [PROG]:Allows compiling a custom track 
selection and playback order of up to 20 tracks on a disc.
With the player in STOP mode, enter the desired first track
number and then press the PROGRAM button. The word
“PROGRAM” will light and the display will show the total
number of tracks programmed and total programmed time.
If a second track selection is entered, the word “PRO-
GRAM” flashes, indicating that other track(s) have already
been stored in the program memory. Press the PROGRAM
button to save the second track selection. Repeat procedure
to program additional tracks as desired. This programming
procedure, with readout of the cumulative total number of
programmed tracks and total programming time (including
time between tracks), works for any of the first 13 num-
bered tracks on a disc. You may program track numbers
higher than 13, but from then on no track time information
will appear on the display. To preview a program before
playing it, press PLAY and then use the NEXT
l|
a n d
PREV
|n
buttons to cycle through track selections. Press-
ing PLAY will begin playing program. Pressing STOP once
will stop program play. Pressing PLAY again will resume
play from beginning of program. To cancel program, press
STOP twice.
T I M E :Pressing and releasing TIME repeatedly will cycle
through the following information on the display: current
track time elapsed (default setting initially seen on display),
total disc time elapsed, and total disc time remaining.
A/B:Press the A/B button once while music is playing, then
press it again; the musical passage in the interval between
pressing the button is then repeated in a loop until 
pressing the A/B button once again to discontinue it. 
Display reads “A—B ”t os h o wactivation. Note: you must
discontinue the A/B loop before pressing PLAY to resume
normal playback.
nn:
Pressing and holding this button down will fast
search backward through the track that is playing until it is
released. Rate of search accelerates as button is held down.
ll: 
Pressing and holding this button down will fast
search forward through the track that is playing until it is
released. Rate of search accelerates as button is held down.
SHUFFLE [SHUF]:Press SHUFFLE. “SHUFFLE” lights up on
display, and tracks will now play in random order. Press
SHUFFLE again to return to normal play sequence.
REPEAT [REP]:Press REPEAT once to repeat the entire
disc continuously (“REPEAT” lights up on display). Press
REPEAT once more to continuously repeat the track now
playing (“REPEAT 1” lights up on display). Press REPEAT
once again to discontinue repeat mode.
CD Door Functions/Warnings
• Do not attempt to play a CD without first installing the
supplied CD7 magnetic disc clamp on the CD.
• Use only the supplied CD7 clamp in your CD7 player.
• CD door must be fully closed for the CD7 to operate. 
• All front panel and remote control functions and display
are deactivated when CD door is open, to prevent 
exposure to laser. Do not attempt to bypass this lockout
feature. The CD7 will stop playing if the CD door is
opened while running.
• If the CD door is closed without a CD in the player and
the CD7 is powered up, the display will read No disc.
• If a CD is inserted in the CD7, the CD door is fully closed
and the CD7 is powered up, the CD will spin for a few
seconds while the track information is accessed. The
number of tracks and total disc time will then be dis-
played, indicating the CD is ready to play.
• Keep the CD door closed when the CD7 is turned off and
not in use to keep dust out of the lens and drive area.
Maintenance 
THE CDs
• Keep the shiny surface of the CD clean and free of
scratches. Use a soft lint-free cloth and always wipe the
CD in a straight line from center to outer edge.
• Never use cleaning agents for conventional records on
CDs.
• Detergents or abrasive cleaning agents should not be used
on CDs.
PROBLEMS AND THEIR LIKELY CAUSES
If a problem occurs, run through the points listed below 
before taking your player in for repair.
Check whether:
– condensation has formed on the lens of the laser due to 
a dramatic change in temperature; this will disappear 
naturally after some time.
– the CD has been inserted correctly with the printed side
up and that there is a CD in the compartment and the
cover is fully closed.
– the CD is dirty, badly scratched, warped or defective.
– the player has been inadvertently connected to the
PHONO inputs of the preamplifier.
If the problem remains, try to clear it by switching 
the player off and on again, or unplugging it, waiting 60
seconds, and plugging it in again. If this fails to help, 
consult your Audio Research dealer.
Model Reference CD7
3 
						

							Under no circumstances should you attempt to repair 
or modify the player yourself as this will invalidate the
warranty! 
Connections
The CD7 offers two standard digital output options. Which
option is best for your system will depend on your personal
listening preference, the nature of your system installation
requirements, and the options allowed by your external
digital processor, if one is used.
WARNING:The digital outputs supply only a digital signal
and should therefore only be connected to an input which
is suitable for this signal. Never connect either of these 
digital outputs to a non-digital input of a preamplifier (such
as those labeled CD, AUX, PHONO, TAPE, etc.) or to a
power amplifier. To do so is to risk damage to your system
and may void any or all warranties involved.
Digital Outputs
BNC COAXIAL:Use 75-ohm impedance coaxial cable with
locking BNC-type connectors. An RCA/BNC adaptor is also
supplied.
BALANCED XLR:For connection to digital processors 
having the AES/EBU-Standard interface.
Analog Outputs
SINGLE-ENDED (RCA): For connection to the inputs of a
line-level preamplifier or integrated amplifier, 
BALANCED (XLR):For connection to the balanced inputs
of a line-level preamplifier.
Servicing
C A U T I O N :Your CD7 contains sufficient levels of voltage
and current to be lethal. Do not tamper with a component
or parts inside the unit. Refer any needed service to 
your authorized Audio Research dealer or other qualified
technician.
Should service be necessary, please contact your Audio 
Research dealer, or Audio Research Customer Service 
(763) 577-9700.
Cleaning
To maintain the visual appearance of your CD7,occasionally
wipe the front panel and top cover surfaces with a soft
damp (not wet) cloth to remove dust. A mild, non-alkaline
soap solution may be used to remove fingerprints or similar
smudges. Cleaners containing abrasives should notbe used
as they will damage the brushed grain of the front panel
finish, as well as the LED display window. A dry 2-inch
pure bristle paint brush works well to remove dust  from
bevels, reliefs and switches. The CD7 CD compartment
may be gently dusted: carefully avoid touching the laser 
assembly area to prevent possible damage.
FCC Rules
N O T E :This equipment has been tested and found to 
comply with the limits for a Class B digital device, pursuant
to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference
in a residential installation. This equipment generates, uses
and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause
harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be
determined by turning the equipment off and on, the user
is encouraged to try to correct the interference by one or
more of the following measures:
Reorient or relocate the receiving antenna.
Use interconnect cables of no more then one meter in
length.
Increase the separation between the equipment and 
receiver.
Connect the equipment into an outlet on a circuit dif-
ferent from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV 
technician for help.
Disposal and Recycling Guidelines
To dispose of this electronic product, do not place in land-
fill. In accordance with the European Union Waste Electri-
cal and Electronic Equipment (WEEE) directive effective 
August 2005, this product may contain regulated materials
which upon disposal require special reuse and recycling
processing.
Please contact your dealer or importing distributor for 
instructions on proper disposal of this product in your
country. Or, contact Audio Research Corporation (763-577-
9700) for the name of your importing distributor and how
to contact them.
Packing and shipping materials may be disposed of in a
normal manner.
Model Reference CD7
4 
						

							Limited Warranty
Audio Research Corporation products are covered by a 3-
Year Limited Warranty, or a 90-Day Limited Warranty 
on vacuum tubes. This Limited Warranty initiates from the
date of purchase, and is limited to the original purchaser, or
in the case of demonstration equipment, limited to the 
balance of warranty remaining after original shipment to
the retailer or importer.
In the United States, the specific terms, conditions and
remedies for fulfillment of this Limited Warranty are listed
on the warranty card accompanying the product in its ship-
ping carton, or may be obtained from the authorized retail-
er or from the Audio Research Customer Service Depart-
ment. Outside the United States, the authorized importing
retailer or distributor has accepted the responsibility 
for warranty of Audio Research products sold by them. 
The specific terms and remedies for fulfillment of the 
Limited Warranty may vary from country to country. 
Warranty service should normally be obtained from the 
importing retailer or distributor from whom the product
was purchased.
In the unlikely event that technical service beyond the abil-
ity of the importer is required, Audio Research will fulfill
the terms and conditions of the Limited Warranty. Such
product must be returned at the purchasers expense to the
Audio Research factory, along with a photocopy of the 
dated purchase receipt for the product, a written descrip-
tion of the problem(s) encountered, and any information
necessary for return shipment. The cost of return shipment
is the responsibility of the purchaser.
Specifications
OUTPUTS, ANALOG: (Stereo)
1.Balanced XLR 5.4V RMS  (+14.6dBv) max.
2. Single-EndedRCA 2.7V RMS (+8.6dBv) max.
OUTPUT IMPEDANCE: (Analog)
660 ohms BAL, 330 ohms SE.
FREQUENCY RESPONSE:
0.5–20,000Hz +0-1dB.
SIGNAL TO NOISE RATIO: 110dBA
DISTORTION:.005% 1kHz
RESOLUTION:24 BIT DELTA-SIGMA DAC.
CHANNEL SEPARATION:95dB 1kHz.
OUTPUTS, DIGITAL: (to external Digital-to-Analog Converter)
1.XLR Balanced AES/EBU 110-ohm 4V P-P.
2.BNC coax SPDIF 75-ohm 0.7V P-P.
SIGNAL FORMAT (disc):
Sampling frequency: 44.1kHz.
Quantization Bit: 16bit linear per channel.
Channel bit rate: 4.3218Mb/sec.
Channel modulation code: EFM (8 –14 modulation).
Error correction: CIRC (cross interleave Reed 
Solomon Code). 
DRIVE MECHANISM (top load):
Wow & Flutter: Unmeasureable (Quartz stability).
Discs: Accepts 5 (12cm) and 3 (8cm) sizes. 
OPTICAL PICKUP:
Type: 3-beam LDGU (Laser Diode & Grating Unit), with 
holographic diffraction light pen.
Laser: GaAIAs semiconductor, 780nm, 0.5mW maximum 
output.
Servo: Digitally-controlled low-inertia linear positioning 
actuator.
JITTER REDUCTION:High-stabillity crystal-controlled 
re-clocking for all outputs.
DISPLAY:Six-digit vacuum fluorescent, with optical filter.
POWER REQUIREMENTS (detachable power cord):
5
Model Reference CD7 
						

							100-135VAC 60Hz (200-270VAC  50/60Hz), 120 watts 
maximum. (5 watts maximum when unit is turned off)
COMPLIANCE: RF Interference complies with FCC and CE
MARK.
FRONT PANEL CONTROL FUNCTIONS:
PREV |
nselection
PLAY ldisc
NEXT l|selection
PAUSEIIprogram 
STOP■disc
POWEROon/off
INFRARED REMOTE CONTROLFUNCTIONS:
(Standard RC5 code, 30ft max distance)
0–9 digit entry keys
SCAN ten seconds each track
PAUSE program
REP track/disc
STOP program
PLAY disc
SHUF random sequence play
|nnsearch, REV
ll|search, FWD
STBY operate/standby mode
PROG enters selection on program list
TIME elapsed, remaining track; remaining disc
A/B repeats segment
|n
previous track
l| 
next track
DIMENSIONS: 19 (48 cm) W x 51/
4
 (13.4 cm) H x 153/
8

(39.0 cm) D. Handles extend 11/
2
 (3.8 cm) forward of the front
panel. Rear connectors extend 3/
4
 (1.9 cm).
WEIGHT:32.5 lbs. (14.8 kg) Net; 43 lbs. (19.5 kg)  Shipping.
Specifications subject to change without notice.
©2005 Audio Research Corporation.
Model Reference CD7