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7785
Hardware maintenance
IBM 7785 Hardware Maintenance
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Contents
Table of Contents
Bookmarks
Table of Contents
Generai Safety During Work
Safety with Electricity
Safety Lnspection Guide
About this Book
Table of Contents
Hardware Maintenance Reference
SECTION 1. Generai Lnformation
Generai Description
Models
Microprocessor
2Mb Ram
Cmos Ram
Rom Bios
Serial Port
Parallel Port
Diskette Drive Controller
Keyboard Connector and Pointing Device Connector
Power Distribution Contrai Box
Power Distribution Control Box
Display
CD-ROM Drive
Internai 2400-Baud Modem
Lmage Adapter/A
Dual Asynchronous Adapter
SCSI Adapter
Generai-Purpose Lnterface Bus Adapter
Ethernet Adapter
Diskette Compatibility
Hard Disk Drive
Terminating Resistors
Power Supply
Power-On Self-Test (POST)
Setting Password Security (Power-On Password)
System Board Memory
Adapter Memory
Environmental Specifications
Field Replaceable Units
Special Tools
Generai Lnformation
SECTION 2. Lntroduction to Diagnostics
Diagnostic Aids
Using the Reference Diskette
Starting the Reference Diskette
Power-On Self-Test (POST)
Advanced Diagnostic Tests
Starting the Advanced Diagnostic Tests
Diagnostic Program
Presence Test
Lnstalled Devices List
System Checkout
Errar Log
Adapter Diagnostics
Memory Diagnostics
Formatting a Hard Disk Drive
Maintenance Analysis Procedures (Maps)
Symptom-To-FRU Lndex
SECTION 3. Removai/Replacement Procedures
Using the Procedures
Service Position
Removals and Replacements
1005 Left Cover
005 Left Cover
006 Right Cover
007 Rear Cover
1015 Memory Card
1020 Adapters
1025 Lmage Adapter/A Modules
1035 Front Bezel
055 Power Supply
056 Optional Power Supply
1057 Power Distribution Contrai Box
1058 Fan
1059 Fan (Optional)
060 Diskette Drive
1061 Speaker and Battery
1062 Emergency Power off (EPO) Switch
1065 DRB Power Supply
1074 CD-ROM Drive Assembly
1080 System Board
1090 Hard Disk Drive
1095 Display
1096 Keyboard
Locations
Front View
Rear View
Lnterior View (Left)
Lnterior View (Right)
Power and Internai Cables (Left)
Power and Internai Cables (Right)
System Board
System Board Connectors
Cabling and Safety Ground Wiring
Power Distribution Card
Power Distribution Contrai Box
SCSI Configuration & Switch/Jumper Settings
Hardware Maintenance Service
SECTION 4. Start
MAP 0000: Start
Undetermined Problem
SECTION 5. Diagnostic Maps
MAP 0020: System Power
MAP 0200: Memory
MAP 0300: Keyboard
MAP 0610: Diskette Drive
MAP 2000: Lmage Adapter/A
MAP 2100 : SCSI Devices
MAP 3000: DRB and Power Supply
MAP 4000: Generai-Purpose Lnterface Bus (GPIB)
SECTION 6. Parts Catalog
How to Use this Parts Catalog
Assembly N: Example Parts List
Assembly 2: Cart/Main Chassis
Assembly 3: Rear Pane! Cables
Assembly 4: Main Chassis, Left
Assembly 5: Main Chassis, Right
Assembly 6: Front Pane! , Left
Assembly 7: Front Pane!, Right
Assembly 8: Left Pane! Cables
Assembly 9: Right Pane! Cables
Assembly 10: DRB Storage Box
Assembly 11: DRB Power Supply
Assembly 12: CD-ROM Drive Type a
Assembly 13: CD-ROM Drive Type
Assembly 14: Hard Disk Drive
Assembly 15: System Board
Assembly 16: Fan
Assembly 17: Display/Keyboard
Assembly 18: Cart/Drawer
Assembly 19: Tools
Assembly 20: Decals
Appendix. Notices
FCC Statement
Glossary of Terms and Abbreviations
Part Number Lndex
Lndex
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IBM 7785
Hardware Maintenance
Reference/Service
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SA12-7017-05
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