Pro-Ject Audio Systems Juke Box User manual

INSTRUCTIONS FOR USE

Pro-Ject Juke Box

11 11

30 5

17 15

IN MP3 IN 1 IN 2

21V

16V

20a

13a 1414a

SELECTOR

IN MP3

IN 1

IN 2

PRO-JECT JUKE BOX

Controls, features and connections

1 Motor

2 Stepped drive pulley

3 Drive belt * 3a Hook *

4 Hub

5 Platter with felt mat *

6 Tonearm counterweight * 6a Downforce scale

7 Tonearm lift lever

8/18 Tonearm rest and removable transport lock

9 Tonearm tube 9a Tonearm base

10 Lid *

11 Lid hinges

12 Hinge fasteners

13 Power supply socket 16V 13a Power supply socket 21V

14 Speaker connector 14a Line level inputs

15 Anti-skating weight adjustment scale

16 Anti-skating weight *

17 Anti-skating weight support hoop

20 Power switch 20a Start/stop switch (motor)

21 Headshell with finger lift and fitted Ortofon OM 5E cartridge

22 Single adapter *

23 3,5mm connector *

16V and 21V power supply (not shown) *

Dear music lover,

thank you for purchasing a PRO-JECT AUDIO record player.

In order to achieve maximum performance and reliability with this record player you should study these instructions

for use carefully.

Warning of a hazard for the user, the unit or possible misuse.

Important notice.

During assembly and adjustment of the deck small parts could be lost if not carefully placed in a suitable

receptacle. Before starting assembly make yourself acquainted with the parts listed above and correspondingly

numbered in the technical drawings above. Separately packed items are marked with an asterisk *.

Set-up

Make sure the surface you wish to use the turntable on is level (use a spirit level) before placing the turntable on it.

Remove the transport lock (18) from the tonearm. Store it in the original packaging so it is are available for

any future transportation.

Fit the drive belt (3) around the hub (4) and the smaller diameter part of the motor pulley (2). Avoid getting

sweat or grease on the belt as these will deteriorate the performance and reduce the belt's lifespan. Use

absorbent kitchen paper to remove any oil or grease from the outer edge of the hub and the belt. Fit the

platter (5) and felt mat over the spindle of the hub (4).

Cartridge downforce adjustment

The counterweight (6) supplied is suitable for cartridges weighing between 3,5 - 5,5g. Alternative

counterweights for cartridges weighing between 6 - 9g or 1,5 - 3g are available as accessory parts. Adjust the

downforce prior to installing the anti-skating weight.

Pushing carefully, turn the counterweight (6) onto the rear end of the tonearm tube (9), so that the downforce

scale (6a) shows towards the front of the player. Lower the armlift and position the cartridge in the space

between arm rest and platter. Carefully rotate the counterweight (6) until the armtube balances out. The arm

should return to the balanced position if it is moved up or down. This adjustment must be done carefully. Do

not forget to remove the cartridge protection cap if fitted.

Once the arm is correctly balanced return it to the rest. Hold the counterweight (6) without moving it, and gently

revolve the downforce scale ring (6a) until the zero is in line with the anti-skating prong (15). Check whether the

arm still balances out.

Rotate the counterweight counter clockwise (seen from the front) to adjust the downforce according to the

cartridge manufacturer's recommendations. One mark on the scale represents 1 mN (= 0,1g / 0,1 Pond) of

downforce.

The recommended downforce for the factory fitted cartridge is 17,5mN.

Anti-skating force adjustment

Slip the loop of the anti-skating weight's thread over the second groove of the stub to set the correct anti-

skating force for the factory-fitted cartridge. Feed the thread through the loop of the wire support (17).

Connectors

IN MP3 IN 1 IN 2 21V

16V

Take care to connect the left and right channels correctly. The right channel is usually marked red,

the left channel black or white.

The red speaker terminals carry the positive signal (+), the black speaker terminals the negative

signal (–). Make sure the polarity of the connection is correct at each end of the cables.

Inputs

Line level sources such as CD player, tuner, TV or MP3 player can be connected to the input sockets marked

IN MP3, IN 1 and IN 2.

Connection to the speakers

The output terminals accept loudspeaker cables terminated with 4mm ∅Banana plugs, spades connectors

or naked wire.

Only connect one loudspeaker with an impedance not less than 4 Ohm per channel.

Mains power connection

The turntable is supplied with a 16V and a 21V power supply suitable for your country's mains supply. Check

the label before connecting to ensure compliance with the mains rating in your house.

Connect the low voltage plugs from the 16V and the 21V power supply to the socket (13) and (13a) on the

rear of the record player before connecting to the mains.

Fitting the lid

Fit the lid (dust cover 10) carefully over the hinge prongs and adjust the screws (12) until the lid stays open

where you want it to without being too stiff to open or close.

Remote control

ON/OFF

not available

VOL

and

VOL

adjust the sound volume

CH+

CH-

VOL+

VOL-

ON/OFF

and

select the inputs.

The selected input is shown respectively by the lit LED.

Switching on and off

Pressing the power switch (20) switches the unit on and off. The red LED on the front panel shows that the unit

is powered on.

Front panel controls

SELECTOR

IN MP3

IN 1

IN 2

Input selector

After the unit is powered on it is instantly ready to play vinyl records. Pressing the SELECTOR button selects the

IN MP3, IN 1 and IN 2 inputs in turn. The selected input is shown respectively by the lit LED.

Volume

Adjust the volume to the desired level using the large knob on the front panel.

Playing vinyl records

Remove the cartridge protection cap (21) if fitted. Press the start/stop switch (20a) to start the motor. Put the

needle over the lead in-groove and lower the tonearm lift lever. Adjust the volume to the desired level.

Changing replay speed

To play records at 45 r.p.m. first remove the platter (5). Using the accessory tool provided (3a), hook the belt

(3) over the larger diameter part of the motor pulley (2). Refit the platter. To revert to 33,33 r.p.m. repeat the

proceedings using the smaller step on the pulley.

When the Pro-Ject Speed Box ore the Speed Box SE are used speed change between 33 and 45 r.p.m.

is electronic. There is no need to move the belt manually.

*** In addition, 78 r.p.m. is available after fitting a special pulley, which may be purchased as an

optional extra.

For detailed product information please refer to the Pro-Ject web site www.project-audio.com.

Replacing batteries

Proceed as follows:

• Slide open the battery case cover

• Replace the battery. Make sure the battery is the right way round

• Refit the battery case cover

Battery type: 1 x CR 2032 / 3V

Do not dispose the batteries as ordinary domestic refuse. Please dispose your exhausted batteries at

the appropriate collection sites - usually located at supermarkets and drugstores.

Maintenance and cleaning

Your record player requires little or no regular maintenance. Remove dust with a slightly moistened antistatic

cloth. Never use a dry cloth because this will create static electricity which attract more dust! Antistatic

cleaning fluids are available at specialist stores but must be applied sparingly to avoid damage to rubber

parts. It is recommended to fit the needle cover before cleaning or maintenance is carried out to avoid damage.

If the player is not used over a long period of time the drive belt can be removed to prevent unequal stretching.

Always disconnect the record player from the mains power supply as a precaution before maintenance!

Useful tips

The record player should be positioned on a low-resonance surface such as wood or multiple layer ply board

to avoid structural vibrations disturbing replay.

Technical specifications PRO-JECT JUKE BOX

Record player

Nominal speeds 33,33/45,11 r.p.m.. *** 78 r.p.m. optional

Speed variance ±0,9 %

Wow and flutter ±0,15 %

Signal to noise -55dB

Downforce range 10-35mN

Effective tonearm length 8,6 " ( 218,5mm)

Overhang 18,5mm

Outboard power supply 16V/500mA AC, suitable for your country's mains supply

Cartridge Ortofon OM 5E

Frequency range 20-25.000Hz

Channel separation 22dB/1kHz

Output voltage 4mV

Recommended load resistance 47kohms/amplifier connection – MM-input

Compliance/stylus type 20µm/mN – elliptical

Recommended tracking force 17,5mN

Weight 5g

Replacement stylus Ortofon Stylus OM 5E

Amplifier

Power output 2 x 20W/30W at 8ohms/4ohms (both channels driven)

Frequency response 20Hz - 20kHz (+ - 0,2 dB)

Channel separation > 40dB at 20kHz

Noise floor > -100dB (A weighted)

THD < 0,05% at 10W

Gain 22dB

Phono amplifier Moving magnet (MM)

RIAA-equalisation curve accuracy 20Hz - 20kHz / max. 0,5dB

Line level inputs 3 pairs RCA/Phono sockets

Input impedance 20kohms

Outboard power supply 20V/3A DC (peak 7A DC), suitable for your country's mains supply

Replacement battery remote control 1 x CR 2032 / 3V

Power consumption 65W

Dimensions (W x H x D) 415 x 118 x 350mm, dust cover open 415 x 365 x 405mm

Weight 6,5kg

Potential incorrect use and fault conditions

PRO-JECT turntables are manufactured to the highest standards and undergo strict quality controls before

leaving the factory. Faults that may possibly occur are not necessarily due to material or production faults but

can sometimes be caused by incorrect use or unfortunate circumstances. Therefore the following list of common

fault symptoms is included.

The platter doesn't turn although the unit is switched on:

The unit is not connected to the mains power supply. No mains at the socket.

Drive belt is not fitted or has slipped off.

No signal through one or other channel or both channels:

No signal contact from the cartridge to the internal tonearm wiring or from that to

the arm lead. This could be due to a faulty plug,

broken wire or solder joint or simply loose plug/socket connection.

Wrong input selected at amplifier.

Amplifier not switched on.

Amplifier or speakers defective.

No connection to the loudspeakers.

Distorted or inconsistent sound from one or both channels:

Needle or cantilever damaged.

Wrong r.p.m., drive belt overstretched or dirty, platter bearing without oil, dirty or damaged.

Service

Should you encounter a problem which you are not able to alleviate or identify despite the above information,

please contact your dealer for further advice. Only when the problem cannot be resolved there should the

unit be sent to the responsible distributor in your country.

Guarantee repairs will only be effected if the unit is returned correctly packaged. For this reason we recommend

keeping the original packaging. Never return a record player without making sure that is it safely

disassembled and correctly packaged in the original packaging according to the diagrams on the last page of

this user guide. Please remove these parts and pack them separately: lid (10), counterweight (6), anti-skating

weight (16) platter (5), cartridge and belt (3). Fit the cartridge protection cap. Insert the transport lock for the

tonearm (18) prior to carefully packaging the record player.

Warranty

The manufacturer accepts no responsibility for damage caused by not adhering to these instructions

for use and/or by transportation without the original packaging. Modification or change to any part

of the product by unauthorized persons release the manufacturer from any liability over and above

the lawful rights of the customer.

PRO-JECT is a Registered Trademark of H. Lichtenegger.

This guide was produced by: Audio Trade GmbH

The information was correct at the time of going to

press. The manufacturer reserves the right to make

changes to the technical specification without prior

notice as deemed necessary to uphold the ongoing

process of technical development.

Tomearm

transport look

Lid

Platter

Accessories

Tonearm

counterweight

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