Solving Infrared Problems - Compaq Armada E700 Series Maintenance And Service Manual

Problem
Cannot communicate with
another computer.
Cannot communicate with
another computer (cont.)
Cannot transmit data.
2-18 Troubleshooting
Table 2-13

Solving Infrared Problems

Possible Cause
The appropriate software is
not running on both
computers.
The other computer does not
have an IrDA-compliant
infrared port. Your Compaq
computer uses the IrDA
communications protocol.
The pathway between the
infrared ports is obstructed,
one port is more than 30
degrees (plus or minus 15
degrees off the center line)
from the other, or the ports
are more than one meter
apart.
There is an interrupt request
(IRQ) conflict.
There is a baud rate conflict.
There is a conflict with the #
bits.
There is a stop byte conflict.
There is a parity conflict.
Direct sunlight, fluorescent
light, or flashing incandescent
light is close to the infrared
connections.
There is interference from
other wireless devices.
There is a physical
obstruction in the way.
One of the units was moved
during data transmission.
The orientation of the units is
wrong.
The distance between the
units is too great.
Solution
Install the appropriate software
on the second device, start the
second device, and start the
program on both computers.
Communication between infrared
devices must use the same
communications protocol. Check
the manufacturer's instructions for
connecting with infrared devices
or try connecting with a device
you know to be IrDA-compliant.
Remove the obstruction, align
the infrared ports to within 30
degrees, and position computers
within 1.5 feet (about 0.5 meter)
of each other.
Check for IRQ conflicts in the
Device Manager If two devices
have the same IRQ address,
reassign one of the devices.
Select the same baud rate for
both computers.
Select the same # bits setting for
both computers.
Select the same stop byte for
both computers.
Select the same parity setting for
both computers.
Remove the interfering light
source(s).
Keep remote control units such
as wireless headphones and
other audio devices away from
the infrared connections.
Do not place objects that will
interfere with a line-of-sight data
transmission between the two
units.
Do not move either unit during
data transmission.
Adjust the devices so that they
point directly at each other.
Verify that devices are not more
than 1.5 feet (0.5 meter) apart.
Continued