Texas Instruments 51X c

2.5.3 Installing External Serial Port Device

The notebook contains an RS-232 serial port with a male DB-9 connector as

shown in Figure 2-7. The serial ports are used to interconnect such devices

as:

•External Modem

•Serial Printer

•Any device that uses an RS-232 interface

To connect a printer to the notebook, ensure that both the notebook and the

printer are turned off.

cCaution: Never connect a parallel device to a serial port or a serial de-

vice to a parallel port or video port; this may cause damage to the

Notebook and/or peripheral device. If you are uncertain of what type

connector the external device has, refer to the technical manual for the

external device.

345

678

SERIAL PORT PINOUTS

DCD (CARRIER DETECT)

RXD (RECEIVE DATA)

TXD TRANSMIT DATA)

DTR (DATA TERMINAL READY)

GND (GROUND)

DSR (DATA SET READY)

RTS (REQUEST TO SEND)

CTS (CLEAR TO SEND)

RI (RING INDICATOR)

SIGNAL

Figure 2-7 Serial Port Location/Pinouts

2-8 Installation

Contents

Main Page Contents Preface 1 General Description 2 Installation 3 Operating Instructions 4 Theory of Operation 5 Troubleshooting Procedures 6 Field Service ASelf Test Error Messages BPC-Doctor Diagnostics Preface Introduction Intended Audience Contents Other Manuals About the System Ordering Parts and Supplies 1 General Description 1.1 1.2 Model 510 Model 515 1.3 Configuration P/N Suffix Configuration P/N Suffix 1.4 Page Figure 1-2 Extensa 51x Series Features 1-4 General Description 1.4.1 1.4.2 1.4.3 n 1.4.3.1 Controls and Indicators ^ 1.4.4 1.4.5 Status LEDs 1.4.6 1.5 1.6 Subassemblies 1.6.1 1.6.2 1.7 Specifications Table 1-3 Extensa 51x Notebook Features Specifications Model 510 Model 515 General Description 1-13 * Weight specifications do not include AC Adapter 1.8 2 Installation 2.1 2.2 n 2.3 c n 2.3.1 Page 2.3.2 2.3.3 2.4 c 2.5 2.5.1 2.5.2 2.5.3 c 2.5.4 2.5.5 2.5.6 2.5.7 2.6 c 2.7 2.8 2.9 2.10 3 Operating Instructions n 3.1 3.2 3.2.1 3.2.2 Status LEDs 3.2.3 3.2.4 3.3 3.3.1 3.3.2 3.3.3 3.3.4 3.3.5 3.3.6 3.3.7 3.3.8 n 4 Theory of Operation 4.1 4.2 4.2.1 MAIN BOARD Figure 4-1 Notebook Functional Block Diagram 4-2 Theory of Operation 4.2.2 4.2.3 4.2.3.1 External VGA Drive Capability c 4.2.4 c 4.2.5 4.2.6 4.2.7 Page Table 4-4 Primary Battery Pack Specifications Function Specifications 4-8 Theory of Operation 5 Troubleshooting Procedures 5.1 5.2 SEE PARAGRAPH 5.3.3 Figure 5-1 Troubleshooting Flowchart 5-2 Troubleshooting 5.3 5.3.1 (EG. a lamp) to verify that voltage is present. If the voltage is OK, try replacing the AC Adapter 5-4 Troubleshooting MAIN BOARD n 5.3.3 5.3.4 5.3.5 5.3.5.1 Interactive Tests Page 5.3.5.3 Creating a Bootable Floppy Diskette n 5.3.5.4 Running PC-Doctor Page 6 Field Service c 6.1 6.2 6.2.1 c 6.2.2 6.2.3 6.2.4 6.3 c 6.4 and Assemblies 6.4.1 Page 6.4.2 Table 6-2 Base Assembly, Field-Replaceable Units (FRUs) FRU Description Page CRU Description c 6.5 c Replacement Procedures 6.5.1 Pack 6.5.2 n c 6.5.3 6.5.4 6.5.5 Assembly 6.5.6 Hard Drive Cover HDD Release Latches 6.5.7 6.5.8 6.5.9 or Contrast Board c 6.5.10 6.5.11 Control Board 6.5.12 Supply Board Assembly 6.5.13 6.5.14 Page A Self Test Error Messages A.1 Error Messages A-1 Error Message Corrective Action Table A-2 POST Checkpoint List A-2 Error Messages Error Messages A-3 A-4 Error Messages Page B PC-Doctor Diagnostics B.1 B.2 B.3 B.4 B.4.1 B.4.2 n B.4.3 B.4.4 B.4.5 B.5 B.6