SPHINX Project Two Mk2 Service Manual
2
1. UNPACKING.......................................................................................................................................3
2. SPHINX WARRANTY CARD..............................................................................................................3
3. CONTACTING THE MANUFACTURER.............................................................................................3
4. THE PRE-AMP AT A GLANCE ..........................................................................................................4
Front panel................................................................................................................................................... 4
Rear panel ...................................................................................................................................................5
5. OPERATION .......................................................................................................................................6
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................................................................................................................................8
7. TECHNICAL SPECIFICATIONS.........................................................................................................9
8. ADJUSTMENT PROCEDURES........................................................................................................10
Bias and Offset ..........................................................................................................................................10
Initial Set-up...............................................................................................................................................10
Bias / Offset Adjustment ............................................................................................................................10
9. PROBLEMS AND SOLUTIONS .......................................................................................................11
10. DIAGRAMS AND PARTS LISTS ....................................................................................................12
Connection Diagram for testing the Project 2 Mk2..................................................................................... 13
Schematic overview of Project 2 mainboard..............................................................................................14
Project 2 power supply overview................................................................................................................15
Project 2 power supply...............................................................................................................................16
Project 2 input selection.............................................................................................................................17
Project 2 left pre-amp.................................................................................................................................18
Project 2 right pre-amp ..............................................................................................................................19
Project 2 phase inverter.............................................................................................................................20
Project 2 display.........................................................................................................................................21
PCB drawings of Project 2 Mk2 .................................................................................................................22
Partlist pre-amp..........................................................................................................................................23
Partlist display ............................................................................................................................................ 31