Contents
v
(continued)
Paragraph Page
Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-1
Notebook Functional Overview - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-1
System Processor - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-3
Memory Subsystem - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-5
Main Memory- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-5
Flash ROM - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-6
System Controller Function - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-6
ALI M1521 (Memory, Cache and DRAM Controller)- - - - - - - - - - - - - 4-8
ALI M1523 (PCA-ISA Bridge)- - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-9
Video Subsystem - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4-12
C&T 65550 Features - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4-12
Versatile Panel Support - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4-13
Low Power Consumption - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4-13
Software Compatibility/Flexibility - - - - - - - - - - - - - - - - - - - - - - - -4-13
Sound Subsystem - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4-13
ESS1878 Audio Controller with Interface to Expansion Audio Mixer -4-13
ES1878 Features - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4-14
Keyboard Subsystem - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4-14
I/O Subsystem - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4-14
NS87338VJG Super I/O Controller - - - - - - - - - - - - - - - - - - - - - - -4-14
Hard Disk Drive Subsystem - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4-17
PCI0643 Features- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4-17
Floppy Disk Drive Subsystem - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4-18
PCI 1130 Features - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4-19
PCMCIA Subsystem - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4-18
Power Subsystem - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4-20
ALI M6377 Power Management Unit - - - - - - - - - - - - - - - - - - - - - -4-22
AC Power Adapter- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4-25
Mobile Productivity Base Interface - - - - - - - - - - - - - - - - - - - - - - - - - - - -4-25
Section 5 Troubleshooting Procedures
Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-1
Overview of Fault Isolation Process - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-1
Troubleshooting Procedures - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-3
Troubleshooting a Power Supply Problem - - - - - - - - - - - - - - - - - - - - - - - 5-3
Troubleshooting a Display Problem - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-3
Fault Isolation Using Power On Self Test- - - - - - - - - - - - - - - - - - - - - - - - 5-4
POST Error Messages - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-5
POST Beep Error Messages - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-8
Run-Time Error Messages - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-9
PCMCIA Modem Problems - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -5-10
Summary of Contents for Extensa 900 Series
Page 1: ...Maintenance Manual ExtensaTM 900 Series Notebook Computers 9813715 0001 December 1996 ...
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Page 171: ...MPB Schematic Diagrams B 3 Figure B 1 MPB CPU Board Logic Diagrams Sheet 2 of 3 ...
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