Service manual

viii

Figures

1-1 Components of the BA30A System Drawer..............................................1-2

1-2 Cover Interlock Circuit (BA30A) .............................................................1-3

1-3 Components of the BA30C System Drawer..............................................1-4

1-4 Cover Interlock Circuit (BA30C)..............................................................1-5

1-5 Components of the BA30B System Drawer..............................................1-6

1-6 Cover Interlock Circuit (BA30B)..............................................................1-7

1-7 AlphaServer 4100 Cabinet System ...........................................................1-8

1-8 Cabinet Fan Tray .....................................................................................1-9

1-9 Pedestal System Front ............................................................................1-10

1-10 Pedestal System Rear..............................................................................1-11

1-11 Control Panel Assembly.........................................................................1-12

1-12 Architecture Diagram.............................................................................1-16

1-13 System Motherboard Module Locations..................................................1-18

1-14 CPU Module Layout and Placement.......................................................1-20

1-15 Memory Module Layout and Placement..................................................1-22

1-16 How Memory Addressing Is Calculated..................................................1-24

1-17 System Bus Block Diagram and Slot Designation...................................1-26

1-18 Bridge Module .......................................................................................1-28

1-19 PCI Block Diagram................................................................................1-30

1-20 Server Control Module...........................................................................1-32

1-21 Power Control Module ...........................................................................1-34

1-22 Location of Power Supply.......................................................................1-36

2-1 Control Panel and LCD Display ...............................................................2-2

2-2 Power-Up Flow........................................................................................2-4

2-3 Contents of FEPROMs.............................................................................2-5

2-4 Console Code Critical Path.......................................................................2-6

2-5 SROM Power-Up Test Flow.....................................................................2-8

2-6 XSROM Power-Up Flowchart................................................................2-12

2-7 Console Device Determination Flowchart...............................................2-18

3-1 CPU and Bridge Module LEDs.................................................................3-2

3-2 Cabinet Power and Fan LEDs...................................................................3-4

3-4 PCM LEDs...............................................................................................3-8

3-5 I

C Bus Block Diagram..........................................................................3-10

4-1 Power Supply Outputs..............................................................................4-2

4-2 Power Control Module .............................................................................4-4

4-3 Power Circuit Diagram.............................................................................4-6

4-4 Power Up/Down Sequence Flowchart.......................................................4-8

4-5 Simple -EB & -EC Cabinet Power Configuration ...................................4-10

4-6 Worst-Case -EB & -EC Cabinet Power Configuration ............................4-11

4-7 -EL & -EM Single Drawer Cabinet Power Configuration .......................4-12

4-8 -EL & -EM Three Drawer Cabinet Power Configuration ........................4-13

4-7 Pedestal Power Distribution (N.A. and Japan) ........................................4-14