1.

SERVICE MANUAL

PROJECT TEN

INTEGRATED

STEREO AMPLIFIER

SPHINX Project Ten Service Manual

1. UNPACKING .......................................................................................................................................3

2. SPHINX WARRANTY CARD ..............................................................................................................3

3. CONTACTING THE MANUFACTURER.............................................................................................3

4. THE AMP AT A GLANCE ...................................................................................................................4

Front panel................................................................................................................................................... 4

Rear panel ................................................................................................................................................... 5

5. SPHINX REMOTE CONTROL ............................................................................................................6

Buttons and LED indication.......................................................................................................................... 6

Operation ..................................................................................................................................................... 7

Selecting without switching .......................................................................................................................... 7

Batteries....................................................................................................................................................... 7

Encountering problems... ............................................................................................................................. 7

6. TECHNICAL SPECIFICATIONS.........................................................................................................8

7. GENERAL CHECKLIST .....................................................................................................................9

Protection modes ......................................................................................................................................... 9

Short Circuit

............................................................................................................................................. 9

Standby mode.............................................................................................................................................. 9

Necessary Equipment .................................................................................................................................. 9

8. ADJUSTMENT PROCEDURES........................................................................................................10

Bias ............................................................................................................................................................ 10

Offset ......................................................................................................................................................... 11

9. PROBLEMS AND SOLUTIONS .......................................................................................................12

10. DIAGRAMS AND PARTS LISTS....................................................................................................13

Connection diagram bias adjustment ......................................................................................................... 14

Connection diagram offset adjustment....................................................................................................... 15

Connections main board and display board of Project 10 .......................................................................... 16

General overview Project 10 ...................................................................................................................... 17

Project 10 power supply and input selection .............................................................................................. 18

Project 10 volume board ............................................................................................................................ 19

Project 10 amplifier left .............................................................................................................................. 20

Project 10 amplifier right ............................................................................................................................ 21

Project 10 control ....................................................................................................................................... 22

PCB drawings of Project 10 ....................................................................................................................... 23

Parts list ..................................................................................................................................................... 24

2

SPHINX Project Ten Service Manual

The Sphinx Project Ten design

The Sphinx Project Ten was designed for the everincreasing group of quality-conscious audiophiles.

We are very proud of the tradition connected with the SPHINX name, especially concerning audio quality perfection.

This service manual will help you to optimally service and repair the Sphinx Project Ten

Integrated Stereo Amplifier

This integrated high-end stereo amplifier is of exceptional quality. With exception of the balanced input section, it is of discrete design throughout (no

IC's are used). The pre-amp section is built around

Dual FET's and the amplifier is DC-coupled from input to output.

The two mono power amps (each channel is totally independent) use special power transistors with a power bandwidth of over 20 MHz, a very fast slew rate and an unsurpassed phase linearity over the power bandwidth. The amplifiers are therefore very stable and can effortlessly drive every type and format of loudspeaker (even the most complex ones such as electrostatic and magnetostatic...) at maximum quality.

All internal audio cabling is Siltech pure silver and the amp outputs are sent to the loudspeaker connectors via heavy duty, completely sealed goldplated relays.

To obtain the maximum quality from this integrated amp it is necessary for it to be properly aligned and to be used with top quality audio components, preferably other Sphinx components.

Please also refer to the User Manual of the

Project Ten for information about functions not described in this manual.

It is important to familiarise yourself with the special functions, operation and possibilities of the Sphinx Project Ten.

1. UNPACKING

Before leaving the factory every Project Ten is subjected to stringent and extensive technical and exterior quality inspection. This ensures the user many years of high quality audio from a perfectlooking product.

We recommend owners to ship the Project Ten in its original carton.

After unpacking the Project Ten we therefore recommend you carefully check it for any transport damage.

If you find any damage and the product has not been shipped in the original carton the ensuring repair costs will not be covered by the warranty.

2. SPHINX WARRANTY CARD

To be entitled to any warranty repairs the owner must have send the filled out warranty card to

Sphinx or a distributor where it has been registered.

Other regulations may apply in your specific country: when in doubt, please consult the proper authorities.

3. CONTACTING THE MANUFACTURER

In case of any problem not covered in this manual or if you have other questions you may contact the

Sphinx International Service Department in The

Netherlands (local time: GMT +1h) during office hours at the following numbers:

Telephone

Fax

E-mail

(+31) 35 602 0302

(+31) 35 602 2806 [email protected]

It is always very helpful and efficient if you have all relevant information about the specific product and the problem ready.

3

SPHINX Project Ten Service Manual

4. THE AMP AT A GLANCE

Front panel

1

2 3 8

1. VOLUME: With this motor-controlled knob you may adjust the volume of the loudspeakers.

The volume can be controlled manually or via the optional Remote Control.

2. STANDBY : To switch the component on and off.

When the component is 'off' (standby) this is indicated by the red LED.

When the component is active the LED will be green.

3. MUTE: Press this button to temporarily mute the sound. The red LED will light.

4. CD: To select the CD input.

5. TUNER: To select the TUNER input.

6. LINE 1: To select the LINE 1 input.

7. LINE 2: To select the LINE 2 input (cinch or balanced).

8. TAPE MON: To select the TAPE IN input.

As soon as you have pressed one of the buttons

5. to 9. the corresponding red LED next to it will light.

9. PHONES: To connect dynamic stereo headphones.

4

5

6

9

7

4

SPHINX Project Ten Service Manual

Rear panel

14

20

11

12

13

15 16

11. ON/OFF : This is the mains power switch.

12. Fuse holder : Contains a fuse (3.15 A slow).

13. AC Power : Connect the mains cable to a mains power outlet (230 - 240 VAC).

14. CONTROL OUT: To connect the optical cable going to another Sphinx component.

15. RIGHT OUTPUT: To connect the cable from the right loudspeaker: red white -

+

16. LEFT OUTPUT: To connect the cable from the left loudspeaker: red white -

+

17. Manufacturer's label: This shows important data for the component, such as serial number and mains power voltage.

17 18 19 21 22

23 24 25 26

18. BALANCED LINE 2 RIGHT: To connect the

XLR signal cable (balanced cable) from the right output of the signal source for Input 2.

19. BALANCED LINE 2 LEFT : To connect the XLR signal cable (balanced cable) from the left output of the signal source for Input 2.

20. CINCH/BALANCED: This switch is to select the input connector for LINE 2: out in

LINE 2 (cinch)

BALANCED LINE 2

21. LINE 2: To connect the cinch signal cable from the signal source for LINE 2.

22. LINE 1: To connect the cinch signal cable from the signal source for LINE 1.

23. TUNER: To connect the cinch signal cable from the tuner.

24. CD: To connect the cinch signal cable from the

CD player.

25. TAPE IN: Connect this input to the output of the recorder.

26. TAPE OUT: Connect this output to the Input of the recorder..

5

SPHINX Project Ten Service Manual

5. SPHINX REMOTE CONTROL

This single Sphinx Remote Control lets you control all functions: not only of the Project Ten, but of all other Sphinx equipment.

Only the following buttons and indications on the

Remote apply to the Project Ten (the others will not function):

Buttons and LED indication

1. PRE-AMP : To select the amp. All buttons pressed hereafter will only control the amp functions.

The buttons TUNER and CD will have no effect on the amp.

2. STANDBY: Use this red button to switch the

Project Ten to stand-by.

3. : Pressing this green button mutes the outputs (temporarily) and you will not hear any sound. The red LED will be illuminated. Another press on this button un-mutes the outputs

4. TAPE/MONITOR: Use this button to select the

Tape IN input. Pressing this button has the same effect as pressing the TAPE button on the front panel.

Note: The LED of the selected input (see 5.) will remain illuminated.

5. 1 - 4 : To select inputs CD to Line 2 .

1 CD

2 Tuner

3 Line1

4 Line 2

6. ñ button: Pressing this button has the same effect as clockwise rotating the VOLUME control on the front panel. You will increase the volume.

7. ò button: Pressing this button has the same effect as anti-clockwise rotating the VOLUME control on the front panel. You will decrease the volume.

6

SPHINX Project Ten Service Manual

Operation

The Sphinx Remote is used for several different models and can therefore transmit different control codes, depending on which model has been selected with the select buttons (1.).

Important: Always press the PRE-AMP button before you send a command (even if you only have one Sphinx component).

If not it is possible that although the Remote will send a signal (LED blinks) nothing happens because the transmitted signal is not 'recognised' by the component.

Indoors the Remote may be used up to a distance of 7 meter, provided there is no strong sunlight in the room and if you aim the Remote at the component.

Always aim the Remote straight at the front panel of the component, the maximum offset angle is 30°.

Selecting without switching

Suppose for instance that you would like to select the Tuner to Radio 4 without interrupting the CD playback.

In that case you momentarily depress (not longer than 0.5 sec) the 'TUNER' button and the '4' button.

The same procedure is used for the other system components

How to operate the Remote Control with the different Sphinx components will be explained in the corresponding User Manual of each component.

Batteries

The four batteries have a life span of approx. one year during normal use, but shorter when used more intensely.

Replacement batteries: 1.5 V, model penligh t or

AAA . You may also use rechargeable 1.5 V batteries.

Note : Position the new batteries exactly as shown in the illustration at the bottom of the battery compartment, otherwise the Remote will not function!

Encountering problems...

Remote Control does not work

Wrong component selected Select the correct one

Distance to component exceeds 7 m

Use remote at closer range

Angle between Remote and component exceeds ±30°

Decrease angle

Sensor window on front dirty

Batteries empty or incorrectly placed

Clean window

Use new batteries or replace the old ones correctly

Strong (sun)light in room Shade off

Component is not switched on (!) Switch it on

Component reacts differently than expected or not at all

Wrong component selected

Component or remote does not function

Batteries of remote empty

Select the correct one

Check component with it's original remote

Use new batteries

7

SPHINX Project Ten Service Manual

6. TECHNICAL SPECIFICATIONS

Bandwidth

Phase response error

Gain

Minimum Power Output (1 - 20.000 Hz)

Output voltage / current, max.

THD+N (IHF-A)

IMD

S/N ratio (IHF-A)

Channel separation

Slew rate

Damping factor

Inputs

XLR, balanced

cinch, unbalanced

level, nominal

impedance

Outputs

cinch

level

headphones

clamp

Supply capacitance

Power consumption

Dimensions (h x w x d)

Weight

0 - 60,000 Hz ( + 0/ 3 dB with RF input filter)

<15° (from 0 - 20,000 Hz)

21 dB max.

>2x 80 W into 8

Ω

(19.0 dBW), THD <0.01%

>2x 120 W into 4

Ω

(20.8 dBW), THD <0.02%

>2x 160 W into 2

Ω

(22.0 dBW), THD <0.02%

34 V / 20 A

<0.01% (80 W into 8

Ω

)

<0.03%

>106 dB

>80 dB (1 - 20,000 Hz)

>25 V/µs

>200 (1 - 20,000 Hz)

1x Line 2

1x Line 2, 1x Line 1, 1x CD, 1x Tuner, 1x Tape

0.15 V (-16.5 dBV) for 60 W into 8

Ω

20 k

Ω

(3 k

Ω

balanced)

1x Tape

10 V max. (20 dBV) (1 - 20,000 Hz, THD <0.01%)

1x 6.3 mm stereo jack, adjustable level

1x loudspeaker L, 1x loudspeaker R

54,400 µF per channel

480 W max. (57.5 W standby)

110 x 482 x 330 mm

12 kg

This unit conforms to the EMC interference regulations from the EU and to the CE standards.

This unit complies with safety regulation VDE 0860 and thus with international safety regulation IEC 65.

Technical specifications can be changed by SPHINX without prior notice if technical developments make this necessary.

©1998 Audioscript BV

8

SPHINX Project Ten Service Manual

7. GENERAL CHECKLIST

Before you test or service the Project Ten please check the following items. They will give information about the current status of the amplifier.

Protection modes

The Project Ten has one protection mode.

Short Circuit

If the Left or Right output is shorted, fuse Z1 or Z2 will blow respectively.

Standby mode

The Project Ten will switch to Standby Mode if the:

•

Standby button on the front panel or

•

Standby button on the Remote is pressed.

In this Mode the following will happen:

•

The output relay is switched off.

•

The Control Output will be activated (red light).

•

The bias current for the Left and Right amplifiers is reduced to 0 mA thus greatly decreasing the operating temperature.

Necessary Equipment

To properly service the Project Ten you need some specific measurement equipment and use a specific set-up.

For the correct measurement set-up and hook-up please refer to the drawing titled “Connection

Connection diagram… at pages 14 and 15.

q 2x millivolt-meter (Ri >1 M

Ω

) q 2x non-inductive load resistor 8

Ω

/ 100 Watt q 1x harmonic distortion analyser

(internal distortion <0.0005%, measured without filters) q 1x 2-channel oscilloscope

(minimum bandwidth >60 MHz) q 1x connection unit / switch box

(to connect scope, resistors and amp outputs to distortion analyser) q 2x shorting connector

(for balanced pre-amp inputs) q 2x balanced cable set

(to connect distortion analyser to Project Ten)

9

SPHINX Project Ten Service Manual

8. ADJUSTMENT PROCEDURES

The Project Ten is an integrated amplifier, meaning the pre-amp and power amp sections are combined into one cabinet.

The Project Ten only has two parameters for each channel (so four in total) that might need adjustment:

- Bias : to set the bias current and bias voltage of the amplifier for normal use.

- Offset : to set the DC-offset voltage of the output.

These adjustments might be necessary when the amplifier has been used for a period of time (and settings have changed due to ageing) or when a part of the Project Ten have been replaced.

Attention:

When re-adjusting any setting please ensure that there is no loudspeaker connected to the output!

Otherwise the loudspeaker may be seriously damaged.

Attention:

The amplifier is able to generate high output voltages of over + or -40 V.

Please be very careful during the adjustments!

The Project Ten is a two channel amplifier.

After removing the top cover plate you will see the

Left and Right Channels clearly marked.

The power transistors are mounted underneath the heatsinks.

Bias

With this procedure you set the proper bias level for the power transistors. This ensures their Class A operation at low power levels.

Connect the amplifier according to the drawing

“Connection Diagram Bias Adjustment” (page 14).

The input of the amplifier must be shorted (by way of the MUTE function of the oscillator).

•

Switch the amplifier ON and wait until it has reached the proper working temperature (this takes an hour).

•

Set the millivolt-meter to the DC-range.

•

Place the two measuring clips of the meter across one of the emitter resistors

Left: R267, R271, R273, R277

Right: R467, R471, R473, R477

(refer to schematic in Pj10main.PDF).

These resistors are positioned to the left of the power supply condensers.

•

The level for each should be 40 mV DC

(±2 mV).

If not: adjust potmeter P202 (Left) or potmeter

P402 (Right) until the level is 40 mV.

•

Switch the oscillator on and set it to 1 kHz and a level of 0 dBu.

•

Check the distortion with a THD analyser: it should be conform the specified values (0.01%

IHF-A @ 1 – 20 kHz @ 80 W into 8 ohm).

•

If this is correct the procedure is finished.

•

You may now switch off the amplifier or continue with another adjustment procedure.

10

SPHINX Project Ten Service Manual

Offset

The Offset adjustment procedure minimises the DC offset value of the amplifier output. This DC offset is important when capacitive loads are used, such as electrostatic loudspeakers. These loudspeakers often use a very low-impedance step-up transformer. The amplifier ‘sees’ this load as a short for the DC voltage.

Connect the amplifier according to the drawing

“Connection Diagram Offset Adjustment” (page 15).

The input of the amplifier must be shorted (by way of the MUTE function of the oscillator)..

Attention :

Do not connect speakers on the Project 10 when adjusting the offset.

Please be careful during the adjustments!

•

Switch the amplifier ON and wait until it has reached the proper working temperature (this takes an hour).

•

Set the millivolt-meter to the DC-range.

•

Place the measurement clips of the meter over the output terminal.

•

The level should not exceed +5 or -5 mV DC.

If not: adjust potmeter P201 (Left) or P401

(Right) until the level is within this range.

•

Switch the oscillator on and set it to 1 kHz and a level of 0 dBu.

•

Check the distortion with a THD analyser: it should be conform the specified values (0.01%

IHF-A @ 1 - 20 kHz).

•

If this is correct the procedure is finished.

•

You may now switch off the amplifier or continue with another adjustment procedure.

11

SPHINX Project Ten Service Manual

9. PROBLEMS AND SOLUTIONS

At the moment of writing the Project Ten has no known specific problems.

If in the future you encounter any problem(s) you may enter the info in this table. This table can then be used for future reference.

Problem Cause

Amplifier doesn’t work

Please also send (by fax or e-mail) the specific information to the Sphinx International Service

Department (see page 3): this info can then be added to the general database to aid others.

Fuses are blowed (short circuit output)

Solution

Replace fuses type 3.15A SB

Refer to page…

Page 18

12

SPHINX Project Ten Service Manual

10. DIAGRAMS AND PARTS LISTS

The next pages contain the front and rear panel lay-out and a complete set of schematic drawings including the associated parts lists (if applicable).

Connection diagram bias adjustment .........................................................................................................14

Connection diagram offset adjustment .......................................................................................................15

Connections main board and display board of Project 10 ..........................................................................16

General overview Project 10 ......................................................................................................................17

Project 10 power supply and input selection ..............................................................................................18

Project 10 volume board.............................................................................................................................19

Project 10 amplifier left ...............................................................................................................................20

Project 10 amplifier right.............................................................................................................................21

Project 10 control .......................................................................................................................................22

PCB drawings of Project 10........................................................................................................................23

Part list .......................................................................................................................................................24

13

SPHINX Project Ten Service Manual

Connection diagram bias adjustment

Project 10

THD ANALYZER

GND

SWITCH-BOX

14

SPHINX Project Ten Service Manual

Connection diagram offset adjustment

THD ANALYZER

GND

GND

Project 10

SWITCH-BOX

15

SPHINX Project Ten Service Manual

Connections main board and display board of Project 10

MAINS INLET

GND

MAINS SWITCH

FUSE

MAINS FILTER

PURPLE

TRANSFORMER

33V

ORANGE

33V

14V

CN103 (RED)

CN104 (YELLOW)

CN105 (BLUE)

CN106 (GRAY)

CN107 (GREEN)

CN108 (PURPLE)

PJ10 main board

+12V

+5V

GND

L1

L2

TU

CD

TM

TS

STB

MU

12V-SW

VOL1

VOL2

IN-L

IN-R

PRE-L

PRE-R

+12V

+5V

GND

L1

L2

TU

CD

TM

TS

STB

MU

12V-SW

VOL1

VOL2

PJ10 control board

IN-L

IN-R

PRE-L

PRE-R

GND

VOL1

VOL2

PJ10 volume board

16

SPHINX Project Ten Service Manual

General overview Project 10

+44V

+15V-L

GND

-15V-L

-44V

PRE-L

OUT-L

+44V

+15V-R

GND

-15V-R

-44V

PRE-R

OUT-R

PJ10 left channel

PJ10 power supply

STB

MU

MUTE

TM

CD

L1

L2

TU

+44V

GND

-44V

+5V

+12V

OUT-L

OUT-R

PJ10 right channel

+12V

GND

IN-L

IN-R

OUT-L

OUT-R

MUTE

+15V-L

-15V-L

+15V-R

-15V-R

PJ10 input/output

17

SPHINX Project Ten Service Manual

Project 10 power supply and input selection

CN103

CN104

CN105

CN106

CN107

CN108

Z1

3.15A

Z2

3.15A

R111

1R00

B101

B102

B103

CN102

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

18PIN

MU

+12V

TS

12V-SW

GND

STB

TM

+5V

CD

+5V

TU

VOL2

L1

VOL1

L2

+

C109

+

8 X 6800U/50V

C110

+

C111

+

C112

8 X 220pF STYROFLEX

125V of 160V op onderzijde solderen

+44V

GND

STB

R101

10K0

2

OPTO401B

T101

BC546

1

OPTO201B

2 1

D106

1N4148

R109

OUT-L

OUT-R

47K5

R110

33K2

C103

330U/50V

OPTO101

R112

1K00

+

R104

22K1

C104

330U/50V

+

+

C113

+

C114

+

C115

+

C116

MU

R105

10K0

-44V

+

C107

1000U

35V

C108

100N

Q102

7812

Vin heatsink

Vout

+5V

TS

CN109

1

2 temperature sensor (optional)

+44V

+12V

+5V

GND

-44V

+12V

+

C106

47U/25V

C102

100N

Q101

7805

Vin Vout +5V

+

C101

C16V/1U5

GND

T102

BD880

+44V

+12V

+5V

GND

-44V

R103

10K0

R102

10K0

TM

CD

TU

L1

L2

12V-SW

REL101A

TAPE-MON

D101

REL102A

CD

D102

REL103A

TUNER

D103

D101 t/m D106 : 1N4148

REL104A

LINE1

D104

REL105A

LINE2

D105

T106

BC546

+12V MUTE

R108

100K

T105

BC546

T107

BC556

R107

100K

D107

6V8

+

C105

47U/25V

R106

10K0

T104

BC546

T103

BC517

GND

1

CN114

XLR

2

3

2

1

3

R503

1K50

R504

1K50

GND

+

C503

47u

+15V-R

C504

100n

GND

5

6

IC501

SSM2143

R502

100R

+

C502

47u

GND

C501

100n

-15V-R

1

CN113

XLR

2

3

2

1

3

R303

1K50

R304

1K50

GND

+

C303

47u

5

6

IC301

SSM2143

R302

100R

+15V-L

C304

100n

GND

+

C302

47u

GND

C301

100n

-15V-L

CN110A

CN112B

CN112A

CN111B

CN111A

R501 4K75

R301 4K75

S101B

S101A

XLR <-> CINCH

REL104B

REL104C

REL103B

REL103C

REL102B

REL102C

REL105C

REL105B

+12V

D108

1N4148

REL106

MUTE to speaker terminals

MAIN-L MAIN-R

OUT-L

R279

1K00

R280

1K00

R281

100R

OUT-R

R479

1K00

R480

1K00 headphone jack

CN115

GND

R481

100R

CN110B

REL101B

REL101C to volume board

IN-R

IN-L

MUTE

OUT-R

OUT-L

+12V

+15V-L

+15V-R

GND

-15V-L

-15V-R

MUTE

OUT-R

OUT-L

+12V

+15V-L

+15V-R

GND

-15V-L

-15V-R

GND

18

SPHINX Project Ten Service Manual

Project 10 volume board solderconnection on volume board

PRE-R

PRE-L

IN-R

IN-L

GND

P801B

P801C

P801A

M solderconnection on main board

VOL1

VOL2

19

SPHINX Project Ten Service Manual

Project 10 amplifier left

R203

2K21

R205

1K50

R207

2K21 from volume board

IN-L

R200

2K21

T202

C2240

R201

47K5

GND

C201

330P

T203

C2240

T205

A970

C202

T207

A970

T204

C2240

LD201

R204

1K00

T201

K389

LD202

R208

221R

GND

C222

47P

22P

R209

3K32

C200

220P

LD203

R217

10R0

GND

T210

A970

R202

22K1

T206

C2240

T208

C2240

R206

182R

GND

C204

100N

R213

100R

GND

+

C208

47U

R215

100R

R212

47K5

R210

10K0

GND

GND

C203

100N

R211

100R

R214

681R

+

C206

47U

GND

R216

100R

BD901

+15V-L

R222

10R0

LD206

R249

332R

C205

1000U

+

+

C210

47U

+

C212

47U

R226

1K00

R225

10K

Z201

16V

LD204

T213

A970

R229

221R

GND

T215

C2240

R237

1K00

R234

1K00

R240

1K00

C214

330P LD208

T223

A970

T225

A1145

T219

C2240

T220

C2240

R253

47R5

T216

C2240

R243

10R

C216

33P

R251

3K92

T209

C2240

P201

200

R219

47R5

R218

221

R220

47R5

R221

1K00

R224

10K0

R236

47R5

C207

1N

R233

47R5

T217

A970

R231

1K00

R232

1K00

GND

GND T218

A970

+

C209

1000U

+

+

C213

47U

C211

47U

Z202

16V

R228

10K

R227

1K00

T214

C2240

R235

1K00

LD205

R230

221R

R238

1K00

T221

A970

R239

47R5

R242

47R5

T222

A970

C215

330P

R241

1K00

R248

95K3

OPTO201A

SFH601-3

GND

C217

220P

LD209

LD207

+

T226

C220

10U

C2705

T224

C2240

R250

332R

-15V-L

R223

10R0

T212

BD902 R246

47R5

R265

47K5

R247

1K82

GND

T230

BC517

R255

47R5

D201

P202

10K

R252

4K75

R254

47R5

PRE-L

OUT-L

+44V

+15V-L

GND

-15V-L

-44V

IN-L

OUT-L

+44V

+15V-L

GND

-15V-L

-44V

POT.METER

P201

P202

FUNCTION

OFFSET

BIAS

+44V

T232

A1302

T227

C3423

R259

221R

R267

1R0

R268

10K0

R266

10R0

C223

100P

R258

47R5

R269

R271

1R0

10K0

R270

10R0

T229

C3298

R256

6R81

R257

6R81

T233

A1302

R260

221R

R264

221R

T228

A1360

T235

C3281

R261

6R81

C224

R277

1R0

100P

R276

10R0

R275

10K0

T231

A1306

R262

6R81

R272

10R0

R274

10K0

R263

47R5

R273

1R0

D202

1N5407

D203

1N5407

R278

15R

4W

GND

C221

100N

T234

C3281

-44V

OUT-L to output relay

20

SPHINX Project Ten Service Manual

Project 10 amplifier right

R403

2K21

R405

1K50

R407

2K21 from volume board

IN-R

R400

2K21

T402

C2240

R401

47K5

GND

C401

330P

T403

C2240

T405

A970

C402

T407

A970

T404

C2240

LD401

R404

1K00

T401

K389

LD402

R408

221R

GND

C422

47P

22P

R409

3K32

C400

220P

LD403

R417

10R0

GND

T410

A970

R402

22K1

T406

C2240

T408

C2240

R406

182R

GND

C404

100N

R413

100R

GND

+

C408

47U

R415

100R

R412

47K5

R410

10K0

GND

GND

C403

100N

R411

100R

R414

681R

+

C406

47U

GND

R416

100R

+15V-R

R422

10R0

BD901

LD406

R449

332R

C405

1000U

+

+

C410

47U

+

C412

47U

R426

1K00

R425

10K

Z401

16V

LD404

T413

A970

R429

221R

GND

T415

C2240

R437

1K00

R434

1K00

R440

1K00

C414

330P LD408

T423

A970

T425

A1145

T419

C2240

T420

C2240

R453

47R5

T416

C2240

R443

10R

C416

33P

R451

3K92

T409

C2240

P401

200

R419

47R5

R418

221

R420

47R5

R421

1K00

R424

10K0

R436

47R5

C407

1N

R433

47R5

T417

A970

R431

1K00

R432

1K00

GND

GND T418

A970

+

C409

1000U

+

+

C413

47U

C411

47U

Z402

16V

R428

10K

R427

1K00

T414

C2240

R435

1K00

LD405

R430

221R

R438

1K00

T421

A970

R439

47R5

R442

47R5

T422

A970

C415

330P

R441

1K00

R448

95K3

OPTO401A

SFH601-3

GND

C417

220P

LD409

LD407

+

T426

C420

10U

C2705

T424

C2240

R450

332R

-15VR-

R423

10R0

T412

BD902 R446

47R5

R465

47K5

R447

1K82

GND

T430

BC517

R455

47R5

D401

P402

10K

R452

4K75

R454

47R5

PRE-R

OUT-R

+44V

+15V

GND

-15V

-44V

IN-R

OUT-R

+44V

+15V-R

GND

-15V-R

-44V

POT.METER

P401

P402

FUNCTION

OFFSET

BIAS

+44V

T432

A1302

T427

C3423

R459

221R

R467

1R0

R468

10K0

R466

10R0

C423

100P

R458

47R5

R469

R471

1R0

10K0

R470

10R0

T429

C3298

R456

6R81

R457

6R81

T433

A1302

R460

221R

R464

221R

T428

A1360

T435

C3281

R461

6R81

C424

R477

1R0

100P

R476

10R0

R475

10K0

T431

A1306

R462

6R81

R472

10R0

R474

10K0

R463

47R5

R473

1R0

D402

1N5407

D403

1N5407

R478

15R/4W

GND

C421

100N

T434

C3281

-44V

OUT-R to output relay

21

SPHINX Project Ten Service Manual

Project 10 control

+5V

U3

TL7757

+

GND

GND

C1

33p

X1

8MHz

+5V

C2

33p

+

C5

100u

25V

C3

100n 16

17

18

19

20

21

22

23

10

11

12

13

14

15

24

25

26 nc

P40

P41

P42

P43

P44

Xtal

EXtal

MD1

MD0

NMI

VCC

STBY

GND

P45

P46

P47

R10

100K

H8

NORMAL JUMPER SETTINGS

JUMPER

J1

CLOSED

SERVICE

OPEN

PJ10

J1

JUMPER

GND

+5V

IR1

SFH506-38

IR

V+

D

GND

2

1

3

+5V

R7

10R0

R8

47K5

+

C4

47u

S1 S2 S3

GND standby mute

R5

475R

+5V +12V

R6

1K50

MU

P16

P17

GND nc

P20

P21

P22

P23

P24

P25

P26

P10

P11

P12

P13

P14

P15

56

55

54

53

52

51

50

49

48

47

46

45

44

60

59

58

57

U1

H8/325

R1

10R0

1

2

3

4

7

8

5

6

GND

IN1

IN2

IN3

IN4

IN5

IN6

IN7

IN8

GND

R9

10R0

U2

ULN2804

OUT1

OUT2

OUT3

OUT4

OUT5

OUT6

OUT7

OUT8

STB

+5V

18

17

16

15

14

13

12

11

LD2

R3

475R

LD1

LD7 standby

R2

475R

LD3 cd

LD4

S4 tuner

R4

1K50

LD5

S5 line1

LD6

S6 line2

T2

C2240

VOL2

T4

A970

C2240

T3

C6

100N

VOL1

T5

A970

GND

MU

TM

CD

TU

L1

L2

S7 tape-mon

L2

VOL1

L1

VOL2

TU

+5V

CD

+5V

TM

STB

GND

12V-SW

TS

+12V

MU to main board

CN1

6

7

8

9

10

11

12

13

1

2

3

4

5

14

15

16

17

18

LINE2

VOL1

LINE1

VOL2

TUNER

+5V

CD

+5V

TAPE-MON

STANDBY

GND

GND

GND

+12V-SW

T-SENSOR

+12V LED

+12V LED

MUTE

22

SPHINX Project Ten Service Manual

PCB drawings of Project 10

Because there is a significant image-quality loss during the conversion of the drawings, the PCB-drawing is located in a separate file.

This file is in PDF-format (Adobé Acrobat 3.0 Reader).

•

Pj10main.PDF for Mainboard

•

Pj10disl.PDF for Display

23

SPHINX Project Ten Service Manual

Parts list

Designator

B101

B102

B103

C201

C202

C203

C204

C205

C206

C207

C208

C111

C112

C113

C114

C115

C116

C2

C200

C1

C101

C102

C103

C104

C105

C106

C107

C108

C109

C110

C216

C217

C220

C221

C222

C223

C224

C3

C301

C209

C210

C211

C212

C213

C214

C215

Part Type

BR102

BR102

WO2M

33pF

1.5uF/16V

100nF

330uF/50V

330uF/50V

47uF/25V

47uF/25V

1000uF

100nF

6800uF/50V

6800uF/50V

6800uF/50V

6800uF/50V

6800uF/50V

6800uF/50V

6800uF/50V

6800uF/50V

33pF

220pF

330pF

22pF

100nF

100nF

1000uF

47uF/25V

1nF

47uF/25V

33pF

220pF

10uF

100nF

47pF

100pF

100pF

100nF

100nF

1000uF

47uF/25V

47uF/25V

47uF/25V

47uF/25V

330pF

330pF

Description

Bridge rectifier

Bridge rectifier

Bridge rectifier

Ceramic capacitor

Electrolytic capacitor

MKT capacitor

Electrolytic capacitor

Electrolytic capacitor

Electrolytic capacitor

Electrolytic capacitor

Electrolytic capacitor

MKT capacitor

Electrolytic capacitor

Electrolytic capacitor

Electrolytic capacitor

Electrolytic capacitor

Electrolytic capacitor

Electrolytic capacitor

Electrolytic capacitor

Electrolytic capacitor

Ceramic capacitor

Styroflex capacitor

Styroflex capacitor

Ceramic capacitor

MKT capacitor

MKT capacitor

Electrolytic capacitor

Electrolytic capacitor

MKT capacitor

Electrolytic capacitor

Electrolytic capacitor

Electrolytic capacitor

Electrolytic capacitor

Electrolytic capacitor

Electrolytic capacitor

Styroflex capacitor

Styroflex capacitor

Styroflex capacitor

Styroflex capacitor

Electrolytic capacitor

MKT capacitor

Styroflex capacitor

Styroflex capacitor

Styroflex capacitor

MKT capacitor

MKT capacitor

24

Part Type

330pF

33pF

220pF

10uF

100nF

47pF

100pF

47uF

1000uF

47uF

47uF

47uf

47uF

330pF

47uF/25V

47uF/25V

100nF

47uF/16V

220pF

330pF

22pF

100nF

100nF

1000uF

47uF

1nF

100pF

100uF/25V

100nF

47uF

47uF

100nF

100nF

18PIN

18PIN

FASTON

FASTON

FASTON

FASTON

FASTON

FASTON

CINCH2P

CINCH2P

CINCH2P

NC3FPP

NC3FPP

1N4148

1N4148

SPHINX Project Ten Service Manual

Designator

C415

C416

C417

C420

C421

C422

C423

C408

C409

C410

C411

C412

C413

C414

C424

C5

C501

C502

C503

C504

C6

C302

C303

C304

C4

C400

C401

C402

C403

C404

C405

C406

C407

CN1

CN102

CN103

CN104

CN105

CN106

CN107

CN108

CN110

CN111

CN112

CN113

CN114

D101

D102

Description

Electrolytic capacitor

Electrolytic capacitor

MKT capacitor

Electrolytic capacitor

Styroflex capacitor

Styroflex capacitor

Ceramic capacitor

MKT capacitor

MKT capacitor

Electrolytic capacitor

Electrolytic capacitor

MKT capacitor

Electrolytic capacitor

Electrolytic capacitor

Electrolytic capacitor

Electrolytic capacitor

Electrolytic capacitor

Electrolytic capacitor

Styroflex capacitor

Styroflex capacitor

Styroflex capacitor

Styroflex capacitor

Electrolytic capacitor

MKT capacitor

Styroflex capacitor

Styroflex capacitor

Styroflex capacitor

Electrolytic capacitor

MKT capacitor

Electrolytic capacitor

Electrolytic capacitor

MKT capacitor

MKT capacitor

18 pin connector

18 pin connector

Flat-cable connector

Flat-cable connector

Flat-cable connector

Flat-cable connector

Flat-cable connector

Flat-cable connector

Cinch connector

Cinch connector

Cinch connector

XLR connector

XLR connector

Diode

Diode

25

Jumper

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

OPTOUT

SFH601-3

SFH601-3

200R

10K

Part Type

1N4148

1N4148

1N4148

1N4148

6V8

1N4148

1N5407

1N5407

1N5407

1N5407

SSM2143

SSM2143

SFH 506-38

SPHINX Project Ten Service Manual

J1

LD401

LD402

LD403

LD404

LD405

LD406

LD407

LD408

LD409

LD5

LD6

LD7

LD1

LD2

LD201

LD202

LD203

LD204

LD205

LD206

LD207

LD208

LD209

LD3

LD4

OPTO101

OPTO201

OPTO401

P201

P202

Designator

D103

D104

D105

D106

D107

D108

D202

D203

D402

D403

IC301

IC501

IR1

Jumper

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

LED red

Optical output

Opto-coupler

Opto-coupler

Trim pot.

Trim pot.

Description

Diode

Diode

Diode

Diode

Zener diode

Diode

Diode

Diode

Diode

Diode

IC

IC

Infrared receiver

26

182R

2K21

221R

3K32

10K0

100R

47K5

100R

475R

2K21

47K5

22K1

2K21

1K00

1K50

10K0

100K

100K

47K5

33K2

1R00

1K00

10R0

100K

10K0

10K0

10K0

22K1

10K0

10R0

10R0

10K0

10K

1K00

1K00

10K

221R

681R

100R

100R

10R0

221R

47R5

47R5

1K00

Part Type

200R

10K

L7805CV

L7812CV

SPHINX Project Ten Service Manual

R206

R207

R208

R209

R210

R211

R212

R213

R2

R200

R201

R202

R203

R204

R205

R106

R107

R108

R109

R110

R111

R112

R1

R10

R101

R102

R103

R104

R105

R222

R223

R224

R225

R226

R227

R228

R229

R214

R215

R216

R217

R218

R219

R220

R221

Designator

P401

P402

Q101

Q102

Description

Trim pot.

Trim pot.

Voltage stabiliser

Voltage stabiliser

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

27

Part Type

10R0

1R0

10K0

10K0

10R0

1R0

10R0

1R0

47R5

221R

221R

6R81

6R81

47R5

221R

47K5

10K0

10K0

10R0

1R0

15R

1K00

1K00

100R

3K92

4K75

47R5

47R5

47R5

6R81

6R81

47R5

10R

47R5

1K82

95K3

332R

332R

221R

1K00

1K00

47R5

1K00

1K00

47R5

1K00

1K00

47R5

1K00

1K00

SPHINX Project Ten Service Manual

Designator

R266

R267

R268

R269

R270

R271

R272

R273

R258

R259

R260

R261

R262

R263

R264

R265

R274

R275

R276

R277

R278

R279

R280

R281

R251

R252

R253

R254

R255

R256

R257

R242

R243

R246

R247

R248

R249

R250

R230

R231

R232

R233

R234

R235

R236

R237

R238

R239

R240

R241

Description

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

28

Part Type

10K

221R

221R

1K00

1K00

47R5

1K00

1K00

47R5

1K00

10R0

10R0

10K0

10K

1K00

1K00

47R5

1K00

1K00

47R5

1K00

1K00

47R5

10R

100R

681R

100R

100R

10R0

221R

47R5

182R

2K21

221R

3K32

10K0

100R

47K5

475R

4K75

100R

1K50

1K50

1K50

2K21

47K5

22K1

2K21

1K00

1K50

SPHINX Project Ten Service Manual

Designator

R428

R429

R430

R431

R432

R433

R434

R435

R420

R421

R422

R423

R424

R425

R426

R427

R436

R437

R438

R439

R440

R441

R442

R443

R413

R414

R415

R416

R417

R418

R419

R406

R407

R408

R409

R410

R411

R412

R3

R301

R302

R303

R304

R4

R400

R401

R402

R403

R404

R405

Description

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

29

Part Type

47K5

10R0

1R0

10K0

10K0

10R0

1R0

47R5

221R

221R

6R81

6R81

47R5

221R

47R5

1K82

95K3

332R

332R

3K92

4K75

47R5

47R5

47R5

6R81

6R81

1K00

100R

475R

4K75

100R

1K50

1K50

1K50

10R0

1R0

10K0

10K0

10R0

1R0

15R/4W

1K00

10R0

47K5

10R0

Relay

Relay

Relay

Relay

SPHINX Project Ten Service Manual

Designator

R465

R466

R467

R468

R469

R470

R471

R458

R459

R460

R461

R462

R463

R464

R446

R447

R448

R449

R450

R451

R452

R453

R454

R455

R456

R457

R480

R481

R5

R501

R502

R503

R504

R6

R472

R473

R474

R475

R476

R477

R478

R479

R7

R8

R9

REL101

REL102

REL103

REL104

Description

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Resistor MRS25

Relay

Relay

Relay

Relay

30

Part Type

Relay

Switch

Switch

Switch

Switch

Switch

Switch

Switch

2SC2240

2SA970

2SC2240

2SC2240

2SA970

BD901

BD902

2SA970

2SC2240

2SC2240

2SC2240

2SA970

2SA970

2SC2240

2SC2240

BC546

BD880

BC517

BC546

BC546

BC546

BC556

T2SC2240

K389

2SC2240

2SC2240

2SC2240

2SA970

2SA970

2SA970

2SA970

2SC2240

2SA1145

2SC2705

2SC3423

2SA1360

2SC3298

BC517

2SA1306

2SA1302

SPHINX Project Ten Service Manual

Designator

REL105

T214

T215

T216

T217

T218

T219

T220

T206

T207

T208

T209

T210

T211

T212

T213

T107

T2

T201

T202

T203

T204

T205

T101

T102

T103

T104

T105

T106

T221

T222

T223

T224

T225

T226

T227

T228

T229

T230

T231

T232

S1

S2

S3

S4

S5

S6

S7

Description

Relay

Switch

Switch

Switch

Switch

Switch

Switch

Switch

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

DUAL N-JFET

Transistor

Transistor

Transistor

Transistor

31

Part Type

2SC2240

2SC2240

2SA970

BD901

BD902

2SA970

2SC2240

2SC2240

2SC2240

2SA970

2SA970

2SC2240

2SC2240

2SA970

2SA1302

2SC3281

2SC3281

T2SC2240

T2SA970

K389

2SC2240

2SC2240

2SC2240

2SA970

2SC2240

2SA970

2SA970

2SA970

2SC2240

2SA1145

2SC2705

2SC3423

2SA1360

2SC3298

BC517

2SA1306

2SA1302

2SA1302

2SC3281

2SC3281

T2SA970

H8/325

ULN2804

TL7757

8MHz

T3.15A

T3.15A

SPHINX Project Ten Service Manual

U1

U2

U3

X1

Z1

Z2

Designator

T415

T416

T417

T418

T419

T420

T421

T408

T409

T410

T411

T412

T413

T414

T233

T234

T235

T3

T4

T401

T402

T403

T404

T405

T406

T407

T430

T431

T432

T433

T434

T435

T5

T422

T423

T424

T425

T426

T427

T428

T429

IC

IC

IC

X-TAL

Fuse

Fuse

Description

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

DUAL N-JFET

Transistor

Transistor

Transistor

Transistor

Transistor

Transistor

32

SPHINX Project Ten Service Manual

Designator

Z201

Z202

Z401

Z402

Part Type

16V

16V

16V

16V

Description

Zener diode

Zener diode

Zener diode

Zener diode

33