Oracle Audio CD 2500 Mk IV User manual

The Fine Art of Playing Music
CD 2500 Mk IV Player / CD 2000 MK III Transport
Owner’s Manual

Oracle Audio Technologies
CD 2500 Mk IV player / CD 2000 Mk III transport Owner’s manual
2
FOREWORD
This is your CD 2000 or CD 2500 owner’s manual. The following pages will describe as succinctly
as possible the assembly of your new CD. Although some operations are self explanatory, we
strongly suggest you read this booklet to better understand the importance of the different key
adjustments.
Your CD is a precision instrument and its performance will be affected by the different adjustments.
It is important to set up your CD with the utmost care for an outstanding musical performance and
enjoyment!
FOR YOUR RECORDS
Oracle CD Serial Number:___________________________________________________________________________
Power Supply Serial Number:________________________________________________________________________
Dealer’s Name:___________________________________________________________________________________
Dealer’s Address: _________________________________________________________________________________
Dealer’s Phone:___________________________________________________________________________________
Purchase Date:___________________________________________________________________________________
We suggest you keep your sales slip together with this owner’s guide.

Oracle Audio Technologies
CD 2500 Mk IV player / CD 2000 Mk III transport Owner’s manual
3
TABLE OF CONTENTS
Content.................................................................................................................4
Pack and unpack your CD....................................................................................5
Suspension Fine Tuning.......................................................................................6
Connection Procedure..........................................................................................8
Using as a CD player or a DAC............................................................................9
Power Supply Connection ..................................................................................10
Magnetic Disc Clamp..........................................................................................11
Operating Instructions ........................................................................................ 12
Remote Control .................................................................................................. 14
Laser Lens Cleaning........................................................................................... 16
Fuse Replacement .............................................................................................17
Technical specifications......................................................................................18
Waranty registration card ...................................................................................19

Oracle Audio Technologies
CD 2500 Mk IV player / CD 2000 Mk III transport Owner’s manual
4
CONTENT
We developed this packing material so that your new Oracle Audio CD 2500 Mk IV player / CD 2000 Mk III transport is
afforded maximum protection.
It consists of:
A double layer cardboard box.
A module of foam packaging for the accessories.
A wooden frame with internal foam packing, protecting the CD turntable itself. It is very important to preserve this
packaging material since it is the only really safe method of transporting your Oracle CD turntable.
The following items are located in the upper foam structure:
4 suspension covers.
Magnetic disc clamp.
Aluminium top cover.
Oracle power supply.
Suspension calibration tool.
Brilliance cleaner and lint free blue cloth.
AC power cord.
15 pin DC signal cord.
Remote control handset and batteries.
The following items are located in the wooden box:
1 CD turntable assembly.
1 plinth assembly including:
o4 suspensions towers.
o1 display module assembly.
1 main CD turntable chassis assembly.
2 main chassis protective foam end caps.
1 main chassis hold down “C” shape foam spacer block.

Oracle Audio Technologies
CD 2500 Mk IV player / CD 2000 Mk III transport Owner’s manual
5
PACK AND UNPACK YOUR CD
Tools needed –Phillips (cross head) or Pozidrive screw driver
–Small needle pliers
Open the external box.
Carefully remove the 4 white foam protection corners.
Turn the brown box on its side so you can pull out the white internal cardboard box.
Carefully slide the white box out and stand it flat with the arrows on the side pointing up.
Open the box first by opening the end flaps then the front.
Remove the white foam layer to access the wooden box, set it aside.
Accessories Foam Block
Remove the power supply, power cord and DC cord, put it aside.
Remove the aluminium top cover and the Brilliance cleaner.
Remove the remote control and install the batteries.
Remove the magnetic disc clamp.
Remove the suspension covers and put them to one side for later installation.
The suspension covers will be installed following the suspension fine tuning should this be required.
Remove the wooden top cover using your Phillips screwdriver.
Grasp the plastic protective bag at each end using the handles and lift the whole Oracle player unit out of the
box.
Open the plastic bag at one end only and remove the foam protective end cap.
Hold the plinth and slide the CD turntable assembly out of the bag.
Remove the “C” shape, hold down spacer block.
Remove the inner protective bag.
Note: Place the inner bag, the 2 protective end caps and the “C” shape hold down spacer blocks back in the
wooden box thus making sure they do not get lost. Put the wooden top cover back up.
Note: When repackaging, it is important to use this inner protective bag to prevent surface damage to the clear
lacquer finish.

Oracle Audio Technologies
CD 2500 Mk IV player / CD 2000 Mk III transport Owner’s manual
6
SUSPENSION FINE TUNING
Caution! Do not attempt to lift the main chassis from the suspension towers as this could damage the connecting
cable between the display module and the main chassis. If the main chassis needs to be removed, a
special technical document is available from Oracle Audio Technologies or your local area distributor.
This work should always be carried out by an experienced and competent technician.
oPlace your Oracle CD player on a flat surface to complete the set up procedure.
Suspension fine Tuning
The suspension of your Oracle CD turntable has been calibrated at the factory but it possibly might require minor fine-
tuning before putting the player into service. To help with this we have supplied a suspension calibration tool to assist
with accurate measurement and calibration of each suspension tower.
Note: Before beginning this step, very carefully seat the aluminium top cover above the compact disc in its
specially machined recess and position, so that the two finger slots match the one on the player main
chassis. The slightly curved section of the finger slots should be facing the front of the unit. This will give
a more accurate operational mass of the main chassis.
This picture indicates the target setting of the suspension system.
The tool supplied will help you determine if a suspension fine tuning is required. If no or only minor changes need to be
performed, you might select to leave the system as it is. At this point, the suspension top covers can be installed and the
player moved to its final playing location. To complete the final leveling of the plinth, it will be necessary to use a spirit
level. The leveling will be achieved by adjusting the height of the threaded feet under the plinth.
Note: The reference to clockwise or counter-clockwise is determined by viewing the spring module from above.
To proceed with minor changes to the suspension fine tuning, please read the following information.

Oracle Audio Technologies
CD 2500 Mk IV player / CD 2000 Mk III transport Owner’s manual
7
Make the suspension housing sit lower:
If the suspension housing is sitting too high as in the picture below;
With one hand apply a light down pressure to the main chassis while holding the suspension housing.
Rotate the spring counter-clockwise by very small increments until the suspension housing lightly rests against
the step on the gauge.
Make the suspension housing sit higher:
If the suspension housing is sitting to low as in the picture below;
Gently raise the suspension housing with one hand.
Using needle nose pliers, insert the tip of the pliers near the end of the spring and hold it firmly.
While holding the spring to prevent it from turning, rotate by very small increments the suspension housing,
counter-clockwise. This will move the spring further out of the spring calibration sleeve thus making the
suspension housing sit higher.
Note: Do not allow the pliers to contact the aluminium parts since this could damage the clear lacquer finish.
Important! In the unlikely event that your Oracle suspension system may need to be completely re-calibrated please
refer to the caution on the preceding page.
When all suspension towers are fine tuned, install the suspension covers.

Oracle Audio Technologies
CD 2500 Mk IV player / CD 2000 Mk III transport Owner’s manual
8
CONNECTION PROCEDURE
The analogue and / or digital connections
CD 2000 Mk III Transport
Your Oracle CD transport is equipped with three digital outputs.
BNC, (75 Ohms) output of 0,5 Volt peak to peak
XLR, AES/EBU (110 Ohms), balanced output of 4 Volts peak to peak
Optical, Toslink
Note: We strongly suggest the use of the best possible Digital and Optical Interconnect cables available, your
dealer will help you make the right choice.
CD 2500 Mk IV Player
Your Oracle CD Player is equipped with:
RCA SPDIF digital output, 0,5 Volts peak to peak @ 75 Ohms
RCA analog output 2 Volts RMS with two independent analog fully discrete analog modules
XLR balanced analog outputs 4 Volts RMS with four independent fully discrete analog modules
You now have a choice of analog connections. You might even consider running both at the same time!
To utilize the analog RCA capabilities, connect your pair of RCA terminated interconnect cables from the rear of the
player to your preamplifier or integrated amplifier (CD INPUT).
To utilize the analog balanced XLR connections, connect your pair of XLR terminated interconnect cables from the rear
of the player to your preamplifier or integrated amplifier’s XLR inputs.

Oracle Audio Technologies
CD 2500 Mk IV player / CD 2000 Mk III transport Owner’s manual
9
Connection to the Pre-Amplifier, CD input
Connect the selected Interconnect cables ( RCA or XLR ) from the rear of the player to your pre-amplifier CD
input.
Note: It is not necessary to use digital output unless connecting to a separate stand alone DAC.
Note: We strongly suggest the use of the best possible analogue Interconnect.
Simultaneous Connection of an external digital to analog converter
It is possible to simultaneously use the RCA (75 Ohms) digital output and the analog outputs of the CD 2500 to compare
the player’s internal digital/analog converter with that of an external (stand alone) D/A converter.
Plug your digital/optical interconnect to the rear of the player and connect it to your stand alone D/A converter.
Connect the Analogue outputs to an “Auxiliary” input at the rear of your pre-amplifier.
Balance the volume between the two D/A converters through the external converter volume control should this
facility be available.
Switch from “CD” to “Auxiliary” so as to compare the two options.
Warning! Lower the volume of the pre-amplifier as there could be a major difference in gain and this could cause
damage to your loudspeakers.
Using your CD2500 Mk IV as a CD player “OR” as a Digital to Analog converter
The toggle switch on the rear panel will define how your CD2500 MK IV will operate.
- To use your CD2500 as a DAC, while standing in front of your player, flip the switch to the left ( towards the
interconnect cables ).
- To use your CD2500 as a PLAYER, while standing in front of your player, flip the switch to the right ( away from
the interconnect cables ).

Oracle Audio Technologies
CD 2500 Mk IV player / CD 2000 Mk III transport Owner’s manual
10
POWER SUPPLY CONNECTION
Connect the 15 pin DC signal cable to the rear of the CD turntable and secure it with the two locking thumbs
screws.
Connect the other end to the power supply and secure it as above.
Plug the AC power cord to the IEC socket at the power supply end, and the other end to the line voltage wall
socket.
Turn the power supply “ON”, indicated by the line ( — ) on the rocker switch above the IEC socket, the red
“L.E.D.” at the front of the power supply will now light up. The “OFF” position is indicated by ( 0 ) on the rocker
switch.
CLASS 1 Laser Product.
This device complies with part 15 of the FCC rules. Operation is subject to the following conditions.
(1) This device may not cause harmful interference and (2) This device must accept any interference
received including interference that may cause undesired operation. This Class B digital apparatus
meets all requirements of the Canadian interference causing equipment regulations. Complies with
21 CFR 1040.1
Important Warning!
It is essential that the protective top cover be installed and remains in place until the
“No Disc” message appears in the CD display. This also applies should the unit be
switched off during a listening session, NEVER remove this cover until the “No Disc”
or the disc information message appears or re-appears after a new switch-on.