NEC MobilePro 780 Portable Computer Users Guide

							  
Troubleshooting  A-1 
 
Troubleshooting 
Your NEC MobilePro is designed to provide many hours 
of service while you are at home or on the road. 
For optimum performance, frequently back up and syn-
chronize the MobilePro data with your notebook or desk-
top computer. Then if something happens, most of your 
data is still available. If you have problems, check the in-
formation in the following table for possible solutions. 
Troubleshooting
 
PROBLEM RESOLUTION 
The MobilePro 
has no power. Check the main battery.  
If you are using an AC adapter, make sure 
the connections are correct and secure. 
 
Make sure the battery bay release lock is in 
the locked position. 
 
Check that the ROM bay cover is properly 
secure. 
Nothing 
appears on the 
screen. Try pressing the Power button again (the 
unit might have turned itself off if it was not 
used for a specified time). 
 
Adjust the contrast.  
Check the power connections. 
 
Troubleshooting (contd) 
PROBLEM RESOLUTION 
A  
						

							  
A-2  Troubleshooting 
Nothing 
appears on the 
screen. (contd) Try recharging the main battery pack. 
 
Check that the ROM bay cover is properly 
secure. 
A low battery 
message 
appears. Recharge the main battery. 
W hen using a 
PC card, such 
as a modem, 
the unit powers 
off. Connect the AC adapter to the unit when 
using PC cards that require large amounts 
of energy. 
The AC adapter 
doesnt work. Make sure that the main battery is installed. 
 
Check that the AC adapter connections are 
secure. 
 
Verify that the AC outlet being used is 
working. Do this by plugging in another 
electric device, such as a lamp. 
The keyboard 
doesnt 
respond. Reset the unit. 
 
If you have installed handwriting recognition 
software, be sure that you have not set the 
“disable keyboard” parameter in that 
software. 
The serial port 
doesn’t work. Check that the cable connections are 
secure. 
The IrDA port 
doesn’t work. Check that nothing obstructs the path 
between the transmitting and receiving IR 
ports. 
 
Check the information in “Using the IR Port,” 
in the NEC MobilePro 780 User’s Guide. 
  
 
Troubleshooting (contd) 
PROBLEM RESOLUTION  
						

							  
Troubleshooting  A-3 
The PC card 
cannot be 
accessed. Make sure the card is inserted correctly and 
seated properly. 
 
Connect the unit to AC power using the 
adapter. Some cards do not operate 
properly unless the AC adapter is 
connected. 
The touch 
screen does not 
respond. Press Ctrl Alt =
 to calibrate the stylus input. 
Follow the on-screen instructions to 
complete the recalibration procedure. 
 
Reset the unit. 
The soft reset 
button does not 
respond. Remove the main battery. Reinstall the 
battery and make sure it is seated properly. 
Try resetting the unit again. 
 
If the soft reset button on the bottom of the 
system does not respond, you may have to 
use the full reset button inside the battery 
bay. Refer to the section, “Resetting the 
MobilePro,” in Chapter 4 of the user’s guide. 
 
This second procedure may result in the 
loss of the memory contents including all 
stored data, settings, and files. 
 
Be sure to make regular backups. 
 
  For further assistance, call NECC Support Services at 
1-800-632-4525 
 Note: If you purchased this computer outside of 
the U.S. and Canada, please contact the local NECC 
office or their dealers for service and support.  
						

							  
Specifications B-1 
 
Specifications 
The following specifications are standard except where 
noted. 
Display 
8.1-inch, 640 x 240, 64K color, liquid crystal display 
(LCD), with backlight, touch screen 
CPU 
NEC VR4121, 168-MHz processor,  
optimized for Windows CE 
User Data Entry Methods 
!
78-key QWERTY keyboard with stylus 
!17.5 mm alpha key pitch 
!Touch screen (input via stylus) 
!Scroll (Jog) dial 
Random Access Memory (RAM) 
32 megabytes (MB); standard 
Read-Only Memory (ROM) 
24 megabytes MB; replaceable 
Speaker 
One built-in speaker 
B  
						

							  
B-2 Specifications 
Infrared (IrDA) Communication 
!
Baud rate — FIR 4 Mbps maximum 
!Distance — 2 to 20 inches 
Serial Interface 
Baud rate — 115.2 Kbps maximum 
I/O Ports 
!
Serial port (Direct Cable connection) 
!IrDA port 
!VGA port (output) 
!Earphone Microphone 
!Modem port 
!Power port (DC in) 
Modem 
!
Data — V. 90, 56 Kbps (AT command) 
!Fax — 14.4 Kbps (Fax control command Class I) 
 Note: Download speed is limited to 53 Kbps. 
Upload speed is limited to 33.6 Kbps. Actual speeds 
may vary depending upon line conditions.  
The built-in modem requires a compatible service 
provider. 
PC Card Slot 
One Type I or Type II PC card slot 
Compact Flash Card Slot 
One Type I or Type II Compact Flash card slot  
						

							  
Specifications B-3 
Power 
!
AC Adapter 
 Input Voltage — 100 to 240 volts AC, 50 or 60 Hz 
 Output Voltage — 9.0 volts, 1,000mA max. 
!Main battery — one rechargeable Lithium-Ion (Li-Ion) 
battery pack (included). 
!Memory backup — approximately 7 days (with de-
pleted main battery) at ambient temperature of 73°F 
(23°C). 
 Note: The period for safe memory backup can 
vary with ambient temperature and other factors. Al-
ways make sure that your MobilePro is powered off 
before you store it. Always recharge your MobilePro 
as soon as possible after depleting the main battery. 
Recharge Time 
!
Use the AC adapter to recharge the MobilePro main 
battery and the backup battery. 
!Recharging time is approximately 4.5 hours when the 
system is on or off. 
!The backup battery usually recharges while the main 
battery is recharging. 
!Initial charging time for the main battery and the 
backup battery is approximately 10 hours with the 
system off. 
!The system must be charged for 10 hours if the main 
battery is depleted for a prolonged period.  
						

							  
B-4 Specifications 
Accessories (ship with the system) 
!
AC adapter – S1424-21A Listed Direct Plug-In Power 
Unit 
 Input Voltage – 100 to 240V AC; 60Hz, 13W 
 Output Voltage – 9V DC 1000 mA 
!Rechargeable Lithium-Ion Battery Pack 
!PC Connect (serial) Cable 
!RJ-11 Telephone Cable 
!VGA Cable 
!Stylus 
Dimensions 
!
9.64 in. (w) x 5.2 in. (d) x 1.13 in. (h) 
!245 mm (w) x 132 mm (d) x 28.8 mm (h) 
Weight  
!
1.69 lb. (with battery) 
!770 g (with battery) 
Operating Environment 
!
Temperature — 32° to 104°F (0° to 40°C) 
!Humidity — 35% to 85% (No condensation) 
Storage Environment 
!
Temperature — 14° to 140°F (–10° to 60°C) 
!Humidity — 35% to 85% (No condensation)  
						

							  
Specifications B-5 
Available Options 
!
AC Adapter (S1424-21A) 
!AA Battery Adapter (MC-BA10) 
!PC Connect (serial) Cable (S1424-12S) 
!VGA Cable(S1424-12V) 
!Stylus Pack (S1424-17A) 
!Compact Carrying Case (S1424-30A-D) 
!Standard Carrying Case (S1424-30A) 
!Deluxe Carrying Case (290-01500-000) 
!Li-Ion Battery Pack (MC-BA9) 
!Earphone Microphone (MC-EM1) 
!High-Speed Printer Cable (MC-RC3E) 
!16 MB CompactFlash™ Storage Card 
(050-00054-000)  
						

							   Battery Replacement 
A lithium battery in some computers maintains system configuration 
information. In the event that the battery fails to maintain system 
configuration information, NECC recommends that you replace the battery. 
For battery replacement information, call your local NECC dealer or the 
NECC Customer Assistance Center. 
!WARNING 
There is a danger of explosion if the battery is incorrectly replaced. 
Replace only with the same or equivalent type recommended by the 
manufacturer. Discard used batteries according to the manufacturer’s 
instructions. 
!AVERTISSEMENT 
Il y a danger d’explosion s’il y a replacement incorrect de la batterie. 
Remplacer uniquement avec une batterie du même type ou d’un type 
recommandé par le constructeur. Mettre au rébut les batteries usagées 
conformément aux instructions du fabricant. 
Battery Disposal 
The main battery is a Lithium-Ion battery. 
The sub-battery is a Lithium/Vanadium battery. 
Do not place used batteries in your regular trash. 
The incineration, landfilling, or mixing of batteries with the municipal solid 
waste stream is prohibited by law in most areas. 
Contact your local waste management officials for other information 
regarding the environmentally sound collection, recycling, and disposal of 
used batteries. If you purchased or are using this computer outside of the 
U.S. or Canada, contact a local NECC dealer in your country.  
						

							  
 
NEC Computers Inc. 
 
 
 
DECLARATION OF CONFORMITY
 
 
 
We, the Responsible Party 
 
NEC Computers Inc. 
8350 Fruitridge Road 
Sacramento, CA  95826 
 
 
 
declare that the product 
 
 
NEC MobilePro 780 
 
 
is in conformity with part 15 of the FCC 
Rules. Operation of this product is subject 
to the following two conditions: (1) this 
device may not cause harmful interference, 
and (2) this device must accept any 
interference received, including 
interference that may cause undesired 
operation. 
 
Product Type: HandHeld PC 
Equipment Classification: Class B peripheral