HP 9800 SERIES - 9845 B;C Mainframe Product Information; 9845 B;C Computer Specifications

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Figures
1-1 Line Voltage Selector Switches ................................................. 1-7
1-2 Bus Address Selector
Switch ................................................... 1-8
1-3
Setting the Drive Number ...................................................... 1-9
1-4 Self-Test Functions
........................................................... 1-11
1-5 9895A Rear Panel
........................................................... 1-13
1-6 Write Enable Method
......................................................... 1-15
2-1 Controller Block Diagram
...................................................... 2-2
2-2 Drive Block Diagram
.......................................................... 2-8
2-3 Track Format
................................................................ 2-11
2-4 Hewlett-Packard Standard Sector Recording Format ............................ 2-14
2-5 IBM Standard Sector Recording Format ........................................ 2-15
3-1 9895A Power Supply Troubleshooting Charts ................................... 3-7
3-2 Differential Read Signal for Entire Track ......................................... 3-9
3-3 Differential Read Signal for Portion of Outer Track ............................... 3-9
3-4
Index Pulse to Write-Splice Bit Timing ......................................... 3-11
3-5
Single- and Two-Sided Adjustment Means ..................................... 3-11
3-6 Drive Electronics Board Layout Diagram
....................................... 3-13
3-7 Head Alignment Amplitude ................................................... 3-15
3-8 Track 0 Optical Sensor Output ................................................ 3-16
3-9 Ejector, Latch and Latch Block ................................................ 3-16
3-10 Load-Pad Adjustment ......... , .............................................. 3-17
3-11 Head-Unload Clearance ............................ , ......................... 3-18
3-12 Drive-Pulley Reversal ........................................................ 3-19
3-13 ROM/PROM Jumper Terminal Configuration ............... " ................. 3-20
4-1 Self-Test Functions ............................................................ 4-1
4-2
09895-66506 Status Display Board ............................................. 4-5
C-1 Removing Front Panel ......................................................... C-2
C-2 Front Panel Removed
......................................................... C-2
C-3 Removing Front Panel
......................................................... C-4
C-4
Self-Test Controls ............................................................. C-5
C-5 Bottom View of Drive Location
................................................. C-9
C-6 Top
View of Drive Location .................................................... C-9
E-l LED Location ................................................................. E-2