IBM 7785 Manuals

Manuals and User Guides for IBM 7785. We have 1 IBM 7785 manual available for free PDF download: Hardware Maintenance

IBM 7785 Hardware Maintenance (249 pages)

Brand: IBM | Category: Keyboard | Size: 8.11 MB

Generai Safety During Work
5
Safety with Electricity
6
Safety Lnspection Guide
9
About this Book
12
Table of Contents
14
Hardware Maintenance Reference
18
SECTION 1. Generai Lnformation
20
Generai Description
21
Models
22
Microprocessor
22
2Mb Ram
22
Cmos Ram
23
Rom Bios
23
Serial Port
23
Parallel Port
24
Diskette Drive Controller
24
Keyboard Connector and Pointing Device Connector
24
Power Distribution Contrai Box
25
Power Distribution Control Box
25
Display
26
CD-ROM Drive
28
Internai 2400-Baud Modem
28
Lmage Adapter/A
28
Dual Asynchronous Adapter
29
SCSI Adapter
29
Generai-Purpose Lnterface Bus Adapter
30
Ethernet Adapter
30
Diskette Compatibility
30
Hard Disk Drive
31
Terminating Resistors
32
Power Supply
32
Power-On Self-Test (POST)
33
Setting Password Security (Power-On Password)
34
System Board Memory
35
Adapter Memory
35
Environmental Specifications
37
Field Replaceable Units
38
Special Tools
38
Generai Lnformation
38
SECTION 2. Lntroduction to Diagnostics
40
Diagnostic Aids
41
Using the Reference Diskette
41
Starting the Reference Diskette
44
Power-On Self-Test (POST)
44
Advanced Diagnostic Tests
45
Starting the Advanced Diagnostic Tests
46
Diagnostic Program
46
Presence Test
46
Lnstalled Devices List
47
System Checkout
47
Errar Log
47
Adapter Diagnostics
48
Memory Diagnostics
48
Formatting a Hard Disk Drive
49
Maintenance Analysis Procedures (Maps)
49
Symptom-To-FRU Lndex
50
SECTION 3. Removai/Replacement Procedures
52
Using the Procedures
54
Service Position
55
Removals and Replacements
57
1005 Left Cover
57
005 Left Cover
57
006 Right Cover
59
007 Rear Cover
61
1015 Memory Card
63
1020 Adapters
65
1025 Lmage Adapter/A Modules
66
1035 Front Bezel
67
055 Power Supply
68
056 Optional Power Supply
70
1057 Power Distribution Contrai Box
72
1058 Fan
73
1059 Fan (Optional)
75
060 Diskette Drive
77
1061 Speaker and Battery
78
1062 Emergency Power off (EPO) Switch
81
1065 DRB Power Supply
83
1074 CD-ROM Drive Assembly
85
1080 System Board
88
1090 Hard Disk Drive
90
1095 Display
92
1096 Keyboard
94
Locations
95
Front View
95
Rear View
96
Lnterior View (Left)
97
Lnterior View (Right)
98
Power and Internai Cables (Left)
99
Power and Internai Cables (Right)
100
System Board
101
System Board Connectors
102
Cabling and Safety Ground Wiring
103
Power Distribution Card
105
Power Distribution Contrai Box
105
SCSI Configuration & Switch/Jumper Settings
106
Hardware Maintenance Service
118
SECTION 4. Start
120
MAP 0000: Start
121
Undetermined Problem
136
SECTION 5. Diagnostic Maps
138
MAP 0020: System Power
140
MAP 0200: Memory
157
MAP 0300: Keyboard
163
MAP 0610: Diskette Drive
169
MAP 2000: Lmage Adapter/A
172
MAP 2100 : SCSI Devices
182
MAP 3000: DRB and Power Supply
186
MAP 4000: Generai-Purpose Lnterface Bus (GPIB)
193
SECTION 6. Parts Catalog
196
How to Use this Parts Catalog
199
Assembly N: Example Parts List
199
Assembly 2: Cart/Main Chassis
201
Assembly 3: Rear Pane! Cables
202
Assembly 4: Main Chassis, Left
204
Assembly 5: Main Chassis, Right
206
Assembly 6: Front Pane! , Left
207
Assembly 7: Front Pane!, Right
208
Assembly 8: Left Pane! Cables
209
Assembly 9: Right Pane! Cables
210
Assembly 10: DRB Storage Box
211
Assembly 11: DRB Power Supply
212
Assembly 12: CD-ROM Drive Type a
213
Assembly 13: CD-ROM Drive Type
215
Assembly 14: Hard Disk Drive
216
Assembly 15: System Board
217
Assembly 16: Fan
218
Assembly 17: Display/Keyboard
219
Assembly 18: Cart/Drawer
221
Assembly 19: Tools
223
Assembly 20: Decals
224
Appendix. Notices
226
FCC Statement
226
Glossary of Terms and Abbreviations
228
Part Number Lndex
230
Lndex
234

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