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Appendix A
Schematic Diagrams
This Appendix includes the logic diagrams and schematics for each PCB in the D2246
disk drive. It also includes drawings illustrating the interface and cable connections
between PCBs and the signal pin assignments for each connector.
A.I SIGNAL TRACING SCHEME
The signal tracing scheme provides the ability to easily trace a signal from source to
destination within the D2246 logic. Each individual drawing contains, in its lower
right-hand corner, a page number, an identifier, and a drawing number as shown in
Figure A-I.
Figure A-I also shows the horizontal/vertical coordinates that are used to locate and
identify a signal upon a specific page.
A.2 DRAWINGS
Table A-I lists the drawings contained in this Appendix along with their drawing
numbers.
Table A-I Schematic Drawings
DIAGRAM
1/0 Connectors
Interface and Power Connectors
HeadlDisk Assembly Internal
Cabling Diagram
Internal Cabling Diagram
Route 0 (Port A) Interface
Route 1 (Port B) Interface
G9QSW PCB Schematic
G9QST PCB Schematic
G9QSN PCB Schematic
G9QSQ PCB Schematic
HeadlDisk Assembly and
Motor Circuit Diagram
G9MRY PCB Schematic
A-I
DRA WING NUMBER
134-296076-021
134-296076-022
134-296076-011
134-29607 6-012
134-296077 -051
134-296077-052
134-296077-101/111
134-296077-201/226
134-296077-301/309
134-296077-401/403
134-296077 -501
134-296077 -601
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