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Main board – Texas Instruments EXTENSA 570CD User Manual

Page 52

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Check to see that the battery pack is installed correctly (try using a
recharged battery pack if battery is discharged)

If the AC outlet voltage, AC Adapter, and battery packs test normal but
the computer will not power up, replace the Power Supply Board and/or
Battery Board as described in Section 6.

MAIN BOARD

SYSTEM &

SVGA BIOS

INTERNAL 1.44 MB
FLOPPY DISK DRIVE

PARALLEL
PRINTER PORT

Super I/O

Control ler

RS232
SERIAL PORT

Drivers/
Receivers

Expansion Bus
Con ne ctor

PCMCIA Adapter
UM8365A

SIR
In ter face

PCMCIA Option Slot(s)

Pentium
Processor
(P54C/LM)

IR/Sound
Boar d

DRAM
(2 Bank)

PCI Bus

Cache MEMORY

DBC
82C556

Audio IN/OUT
Mic In

CPU Data

System
Controller
82C557

CPU Address

IPC

Memory
Data

EXTERNAL

SVGA MONITOR

Input From

AC Adap te r

Battery Packs

Video
Controller

INTERNAL KEYBOARD

1 MB
Video RAM

640 X 480

SVGA LCD

INTERNAL LCD DISPLAY

Internal
Gl i depad

PMU/Keyboard
Controller

HDD

CD-ROM

SIMM Memory
Expansion
Modules

RTC
82C602A

PCI Bus

PCI Bus

IR /Audi o
Board

Figure 5-2 Troubleshooting Block Diagram

5-4 Troubleshooting Procedures