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
