Seagate ST8851J Manuals

Manuals and User Guides for Seagate ST8851J. We have 1 Seagate ST8851J manual available for free PDF download: Maintenance Manual

Seagate ST8851J Maintenance Manual (129 pages)

Sabre Disc Drive

Brand: Seagate | Category: Computer Hardware | Size: 3.36 MB

Table of Contents
11
Important Safety Information and Precautions
16
Abbreviations
20
GENERAL MAINTENANCE Inr'ormation
22
Introduction
23
Electrostatic Discharge Protection
23
Maintenance Tools and Materials
24
Testing the Drive
25
Field Test Units
25
Maintenance Tools and Materials
25
Drive Diagnostics
26
System Software
26
Identifying Test Points
27
I"' Accessing Assemblies for Maintenance
28
Component Locator
30
Test Points
32
Trouble Analysis
36
Introduction
37
Drive Power on Test
38
Voltage Checks
40
Troubleshooting Procedures
41
Example of Troubleshooting Procedure
43
Tspl - Power Check
44
TSP2 - Voltage Fault Check
46
TSP3 - First Seek Check
50
TSP4 - Seek Check
51
TSP5 - Write Check
52
TSP6 - Read Check
54
TSP7 - Address Mark Check
55
Diagnostic Testing
56
General
56
Switches and Indicators
56
Switch/Indicator Descriptions
57
Test Selection Procedure
58
Test Descriptions
59
Test
59
Display Fault Log
59
Test 04 Calculate Three most Likely Field Replaceable Units
62
Test 05 Servo Test
63
Test 06 Clear Drive Operating Status Log
63
Test 07 Clear Fault Log
64
Test 08 Direct or Continuous Seeks
64
Test 09 Random Seek
65
Test OC Display EPROM Part Number
65
Test OE Return to Zero
65
Test 2F I/0 Test
66
Drive Status Codes
66
Example of LCD (Liquid Crystal Display)
67
Drive Status Codes
67
Interface Testing
74
Testing SMD Interface Drives
74
Testing SCSI Interface Drives
75
I/O Board Self-Test
75
SMD-E Online FRU Codes
75
Inquiry Command
77
Receive Diagnostic Results Command
79
Diagnostic Data Return Bytes
79
Additional Length Bytes
80
FRU Code
80
Error Code
80
Drives
80
SCSI Online FRU Codes
80
Testing IP! Interface Drives
89
The Self-Test and Initialization Sequence
89
Starting the Tests
90
Execute Internal Diagnostics Function
91
Read Drive Specific Information (Bus Control 43)
91
Native-Controlled Diagnostic Status Codes
93
Native-Controlled Diagnostic FRU Codes
94
Native-Controlled Diagnostic Fault Codes
94
Repair and Replacement
97
Introduction
98
Replacement
99
3101 - Top Cover Removal & Replacement
100
Removal
100
Top Cover Removal and Replacement
101
Replacement
102
3102 - Entire Drive Removal & Replacement
104
Removal
107
3103 - Front Panel Removal & Replacement
107
Removal
111
Replacement
111
3201 - Fan Removal & Replacement
111
Removal
113
Replacement
113
3202 - Operator Panel and Status/Control Panel Removal
113
Operator Panel or Status/Control Panel Replacement
114
Replacement
115
Removal
116
3203 - Power Supply Removal & Replacement
116
Power Supply Removal & Replacement
117
Power Supply Voltage Conversion
118
Removal
119
Replacement
119
3204 - Module Removal & Replacement
119
Removal
120
Replacement
122
3301 - 1/0 Board Removal & Replacement
122
Removal
123
Replacement
123
3302 - Control Board Removal & Replacement
123
Removal
125
Replacement
125
3303 - Voltage Converter Removal & Replacement
125
Replacement
126
Voltage Converter Removal & Replacement
126

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Seagate ST8851J Maintenance Manual (129 pages)

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