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Manuals
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Seagate Manuals
Computer Hardware
ST8741J
Maintenance manual
Seagate ST8741J Maintenance Manual
Sabre disc drive
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
Important Safety Information and Precautions
Abbreviations
GENERAL MAINTENANCE Inr'ormation
Introduction
Electrostatic Discharge Protection
Maintenance Tools and Materials
Testing the Drive
Field Test Units
Maintenance Tools and Materials
Drive Diagnostics
System Software
Identifying Test Points
I"' Accessing Assemblies for Maintenance
Component Locator
Test Points
Trouble Analysis
Introduction
Drive Power on Test
Voltage Checks
Troubleshooting Procedures
Example of Troubleshooting Procedure
Tspl - Power Check
TSP2 - Voltage Fault Check
TSP3 - First Seek Check
TSP4 - Seek Check
TSP5 - Write Check
TSP6 - Read Check
TSP7 - Address Mark Check
Diagnostic Testing
General
Switches and Indicators
Switch/Indicator Descriptions
Test Selection Procedure
Test Descriptions
Test
Display Fault Log
Test 04 Calculate Three most Likely Field Replaceable Units
Test 05 Servo Test
Test 06 Clear Drive Operating Status Log
Test 07 Clear Fault Log
Test 08 Direct or Continuous Seeks
Test 09 Random Seek
Test OC Display EPROM Part Number
Test OE Return to Zero
Test 2F I/0 Test
Drive Status Codes
Example of LCD (Liquid Crystal Display)
Drive Status Codes
Interface Testing
Testing SMD Interface Drives
Testing SCSI Interface Drives
I/O Board Self-Test
SMD-E Online FRU Codes
Inquiry Command
Receive Diagnostic Results Command
Diagnostic Data Return Bytes
Additional Length Bytes
FRU Code
Error Code
Drives
SCSI Online FRU Codes
Testing IP! Interface Drives
The Self-Test and Initialization Sequence
Starting the Tests
Execute Internal Diagnostics Function
Read Drive Specific Information (Bus Control 43)
Native-Controlled Diagnostic Status Codes
Native-Controlled Diagnostic FRU Codes
Native-Controlled Diagnostic Fault Codes
Repair and Replacement
Introduction
Replacement
3101 - Top Cover Removal & Replacement
Removal
Top Cover Removal and Replacement
Replacement
3102 - Entire Drive Removal & Replacement
Removal
3103 - Front Panel Removal & Replacement
Removal
Replacement
3201 - Fan Removal & Replacement
Removal
Replacement
3202 - Operator Panel and Status/Control Panel Removal
Operator Panel or Status/Control Panel Replacement
Replacement
Removal
3203 - Power Supply Removal & Replacement
Power Supply Removal & Replacement
Power Supply Voltage Conversion
Removal
Replacement
3204 - Module Removal & Replacement
Removal
Replacement
3301 - 1/0 Board Removal & Replacement
Removal
Replacement
3302 - Control Board Removal & Replacement
Removal
Replacement
3303 - Voltage Converter Removal & Replacement
Replacement
Voltage Converter Removal & Replacement
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Sabre Disc Drive
ST8741JIN, ST8851JIN
ST81123J, ST81154K
OKO-Sol.
ST81236JIK!N
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Maintenance Manual
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Table of Contents
Troubleshooting
Troubleshooting Procedures
41
Example of Troubleshooting Procedure
43
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This manual is also suitable for:
St8741n
St8851j
St8851n
St81123j
St81154k
St81236j
...
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St81236k
St81236n
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