SPHINX Project Two MKII Service Manual
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SPHINX Project Two MKII Service Manual

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SERVICE MANUAL
PROJECT TWO Mk2
PRE-AMP

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Summary of Contents for SPHINX Project Two MKII

  • Page 1 SERVICE MANUAL PROJECT TWO Mk2 PRE-AMP...

  • Page 2: Table Of Contents

    Power on..............................6 Selecting an input ............................6 Adjusting the volume level ........................... 6 Memory mode .............................. 6 Power off..............................6 6. SPHINX REMOTE CONTROL ......................7 Buttons and LED indication.......................... 7 Operation ..............................8 Selecting without switching .......................... 8 Batteries............................... 8 Encountering problems...

  • Page 3: Unpacking

    The Sphinx Project Two Mk2 design principles 1. UNPACKING Before leaving the factory every Project Two Mk2 is The Sphinx Project Two Mk2 was designed for the subjected to stringent and extensive technical and ever-increasing group of quality-conscious exterior quality inspection. This ensures the user audiophiles.

  • Page 4: The Pre-Amp At A Glance

    SPHINX Project Two Mk2 Service Manual 4. THE PRE-AMP AT A GLANCE Front panel INPUT: With this rotary knob you may select MUTE: Press this button to temporarily mute one of the six inputs. the sound. The red LED will light.

  • Page 5: Rear Panel

    Control Out: To connect the optical cable LINE 1: To connect the cinch signal cable from going to another Sphinx component. the signal source for LINE 1. Warning!: This shows important information LINE 2: To connect the cinch signal cable from about the safety regulations for the the signal source for LINE 2.

  • Page 6: Operation

    SPHINX Project Two Mk2 Service Manual 5. OPERATION Selecting an input Connect the mains cable to a mains outlet. You select the input with the large rotary knob Once you have finished connecting all components, INPUT: you can power on the Project Two Mk2 with the...

  • Page 7: Sphinx Remote Control

    SPHINX Project Two Mk2 Service Manual 6. SPHINX REMOTE CONTROL This single Sphinx Remote Control lets you control all functions: not only of the Project Two Mk2, but also of all other Sphinx equipment. Only the following buttons and indications on the...

  • Page 8: Operation

    SPHINX Project Two Mk2 Service Manual Operation Encountering problems... The Sphinx Remote is used with several different models and can therefore transmit different control Remote Control does not work codes, depending on which model has been selected with the select buttons (3.).

  • Page 9: Technical Specifications

    This unit conforms to the EMC interference regulations issued by the EU and to the CE standards. This unit complies with safety regulation VDE 0860 and therefore with international safety regulation IEC 65. Technical specifications may be changed by SPHINX without prior notice if technical developments make this necessary.

  • Page 10: Adjustment Procedures

    SPHINX Project Two Mk2 Service Manual 8. ADJUSTMENT PROCEDURES Initial Set-up The Project Two Mk2 only has two parameters that • Connect a low distortion signal generator might need adjustment: (<0.002% internal distortion) to an input of the Bias: to set the bias current and bias voltage of pre-amp.

  • Page 11: Problems And Solutions

    At the moment of writing the Project Two Mk2 has Please also send (by fax or e-mail) the specific two known specific problems. information to the Sphinx International Service If in the future you encounter any problem(s) you Department (see page 3): this info can then be may enter the info in this table.

  • Page 12: Diagrams And Parts Lists

    SPHINX Project Two Mk2 Service Manual 10. DIAGRAMS AND PARTS LISTS The next pages contain a complete set of schematic drawings including the associated parts lists (if applicable). Connection Diagram for testing the Project 2 Mk2..................13 Schematic overview of Project 2 mainboard ....................14 Project 2 power supply overview........................

  • Page 13: Connection Diagram For Testing The Project 2 Mk2

    SPHINX Project Two Mk2 Service Manual Connection Diagram for testing the Project 2 Mk2 PRE-AMPLIFIER THD ANALYZER AMPLIFIER SCOOP SWITCH-BOX...

  • Page 14: Schematic Overview Of Project 2 Mainboard

    SPHINX Project Two Mk2 Service Manual Schematic overview of Project 2 mainboard INPUT/OUTPUT SELECTION PJ02INP.SCH +22V +22V +22V +D24V +D24V +D24V -22V -22V -22V -R-OUT -R-OUT +R-OUT +R-OUT -L-OUT -L-OUT L-INPUT L-INPUT +L-OUT +L-OUT R-INPUT R-INPUT POWER-SUPPLY PHASE-INVERTER LEFT LINE-AMP PJ02PS.SCH...

  • Page 15: Project 2 Power Supply Overview

    SPHINX Project Two Mk2 Service Manual Project 2 power supply overview R-CORE 50VA SEC L7824C +24V +D24V 100N 100N 100N 120V 330U DGND 120V DGND R1, R3, R4,R8..R11, R17..R120 : 11 X 10R0 project-2 analog power supply pj2aps.sch 10K0 +22V...

  • Page 16: Project 2 Power Supply

    SPHINX Project Two Mk2 Service Manual Project 2 power supply 220N 220N 10R0 A1306 +22V (+/-1V) 14VAC +22V 220N 220N 220N 220N 10R0 A1306 10K0 332R 332R 10K0 LED red 220N C2240 C2240 1K00 LED red LED red 10K0 2K00...

  • Page 17: Project 2 Input Selection

    SPHINX Project Two Mk2 Service Manual Project 2 input selection OUT 3 OUT 2 OUT 1 TAPE OUT TAPE IN LINE 3 LINE 2 LINE 1 TUNER CD SYM CN1A CN1B CN17A CN17B CN12A CN13B CN13A CN16B CN16A CN19 +D24V...

  • Page 18: Project 2 Left Pre-Amp

    SPHINX Project Two Mk2 Service Manual Project 2 left pre-amp +22V (+/-1V) LED voltage approx. 1.8V +22V 600R 243R 100R LED red AGND AGND R133 LD16 243R ± 7.5mA ± 7.5mA R107 R106 2K21 2K21 A970 R108 R109 R138 A1145...

  • Page 19: Project 2 Right Pre-Amp

    SPHINX Project Two Mk2 Service Manual Project 2 right pre-amp +22V (+/-1V) LED voltage approx. 1.8V CN11 +22V LED red 600R 243R 100R LD18 4PIN AGND AGND R137 243R ± 7.5mA ± 7.5mA R115 R114 2K21 2K21 A970 R116 R117...

  • Page 20: Project 2 Phase Inverter

    SPHINX Project Two Mk2 Service Manual Project 2 phase inverter +22V 1R00 220N 10K0 330U/50V AGND 220N +R-IN 10K0 -R-OUT 330U/50V 24R9 OPA604AP -22V 1R00 OGND +22V 1R00 220N 10K0 330U/50V AGND 220N +L-IN 10K0 -L-OUT 330U/50V 24R9 OPA604AP -22V...

  • Page 21: Project 2 Display

    SPHINX Project Two Mk2 Service Manual Project 2 display OPTO 61K9 C47U/16V T2SC2240 100NMKT Input-selector Standby M ute Tape-m MAX690 VOUT T2SC2240 T2SA970 VBAT Xtal EXtal 8,00000MHz T2SA970 STBY 100NMKT ULN2804 OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 OPTO OUT8...

  • Page 22: Pcb Drawings Of Project 2 Mk2

    SPHINX Project Two Mk2 Service Manual PCB drawings of Project 2 Mk2 Because there is a significant image-quality loss during the conversion of the drawings, the PCB-drawings are located in seperate files. These files are in PDF-format (Adobé Acrobat 3.0 Reader).

  • Page 23: Partlist Pre-Amp

    SPHINX Project Two Mk2 Service Manual Partlist pre-amp Designator Part Type Description W02M Bridge rectifier 100nF MKT capacitor 220nF MKT capacitor C101 33pF Ceramic capacitor C102 33pF Ceramic capacitor 220nF MKT capacitor 2200uF/63V Electrolytic capacitor 2200uF/63V Electrolytic capacitor 2200uF/63V Electrolytic capacitor...
  • Page 24 SPHINX Project Two Mk2 Service Manual Designator Part Type Description 220nF MKT capacitor 330uF/50V Electrolytic capacitor 220nF MKT capacitor 220nF MKT capacitor 220nF MKT capacitor 220nF MKT capacitor 220nF MKT capacitor 470pF Styroflex capacitor 470pF Styroflex capacitor 47pF Styroflex capacitor...
  • Page 25 SPHINX Project Two Mk2 Service Manual Designator Part Type Description CN21 PHONEJACK Phone jack CN22 KAST_GND Ground connection with case XLR-Male XLR connector male XLR-Female XLR connector female XLR-Female+B51 XLR connector female 4PIN 4 pins header 4PIN 4 pins header...
  • Page 26 SPHINX Project Two Mk2 Service Manual Designator Part Type Description Adjustable pot. Adjustable pot. Adjustable pot. Adjustable pot. ALPS POT M Stereo motor pot. 10R0 Resistor MRS25 10R0 Resistor MRS25 R100 10R0 Resistor MRS25 R101 10R0 Resistor MRS25 R102 2K21...
  • Page 27 SPHINX Project Two Mk2 Service Manual Designator Part Type Description R139 33K2 Resistor MRS25 10K0 Resistor MRS25 R140 600R Resistor MRS25 R141 600R Resistor MRS25 R142 1K00 Resistor MRS25 R143 1K00 Resistor MRS25 R144 600R Resistor MRS25 R145 600R Resistor MRS25...
  • Page 28 SPHINX Project Two Mk2 Service Manual Designator Part Type Description 5K00 Resistor MRS25 5K00 Resistor MRS25 100K Resistor MRS25 15K0 Resistor MRS25 15K0 Resistor MRS25 1R00 Resistor MRS25 10R0 Resistor MRS25 1R00 Resistor MRS25 5K00 Resistor MRS25 5K00 Resistor MRS25...
  • Page 29 SPHINX Project Two Mk2 Service Manual Designator Part Type Description Alcatel 24V MT2 DIL relay Alcatel 24V MT2 DIL relay Alcatel 24V MT2 DIL relay Alcatel 24V MT2 DIL relay Alcatel 24V MT2 DIL relay Alcatel 24V MT2 DIL relay...
  • Page 30 SPHINX Project Two Mk2 Service Manual Designator Part Type Description 2SA1306 Transistor 2SA970 Transistor 2SC2240 Transistor 2SA970 Transistor 2SC2240 Transistor L7824C Voltage regulator OPA604AP OPA604AP OPA604AP OPA604AP...

  • Page 31: Partlist Display

    SPHINX Project Two Mk2 Service Manual Partlist display Designator Part Type Description 47uF/16V Electrolytic capacitor 470uF/25V Electrolytic capacitor 100nF MKT capacitor 100nF MKT capacitor 33pF Ceramic capacitor 100nF MKT capacitor 33pF Ceramic capacitor 100nF MKT capacitor 100nF MKT capacitor 18PIN...
  • Page 32 SPHINX Project Two Mk2 Service Manual Designator Part Type Description 2SA970 Transistor MC7805 ULN2804 H8/325 HD6413258CP10 8,00000MHz X-TAL MAX690 ©1998 Audioscript BV Version: 2-09-98...

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