HP 9800 SERIES Service Manual

iii
Drive Theory of Operation ........................................................... 2-5
Introduction
..................................................................... 2-5
General Description
.............................. : ............................... 2-5
Power Supply Theory of Operation
................................................... 2-9
Introduction
..................................................................... 2-9
General Description
.............................................................. 2-9
Functional Characteristics
and Communication Protocol ............................... 2-10
Introdution .................................................................... 2-10
Format Similarities ............................................................. 2-10
Format Differences ............................................................. 2-11
Chapter 3: Maintenance
Introduction ........................................................................ 3-1
Standard Test Equipment ............................................................ 3-2
Disassembly Procedures
............................................................. 3-3
Introduction ..................................................................... 3-3
Cover Panels .......... , .......................................................... 3-3
Controller Module ............................................................... 3-3
Drive Module
................................................................... 3-3
Fan
Compartment ..... , ............... " ........................................ 3-4
Power Module ................................................................... 3-4
Drive Electronics Board .......................................................... 3-4
Drive Motor Assembly ............................................................ 3-5
Front Plate ...................................................................... 3-5
Maintenance ........................................................................ 3-6
Introduction ..................................................................... 3-6
Troubleshooting ................................................................. 3-6
Corrective Maintenance Procedures ................................................. 3=10
Index-to-Burst Check and Adjustment ...................... ' ...................... 3-10
Radial Alignment ............................................................... 3-12
Door-Closed Switch Adjustment ................................................. 3-16
Track 0 Optical Sensor Adjustment ............................................... 3-16
Disc Ejecto'r ..................................... , .............................. 3-16
Disc-load-Pad Adjustment ...................................................... 3-17
Head-Unload Clearance ................ ; ....................................... 3-18
Line Frequency Conversion Procedure ............................................ 3-18
System Exerciser ................................................................ 3-19
Diagnostic Routines ........................................................ , ... 3-19
PROM to ROM Controller Board Re-configuration .................................... 3-20

HP 9800 SERIES Specifications

General

Category	Storage
Series	9800 SERIES
Type	Disk Array
Drive Types Supported	SAS, SSD
RAID Levels Supported	0, 1, 5, 6, 10
Host Connectivity	Fibre Channel, iSCSI, SAS
Redundancy	Redundant power supplies and fans