Infrared Transceiver Checkout
Infrared Transceiver Checkout
The infrared transceiver is located on the inverter card in the ThinkPad 701C / 701CS.
When you run diagnostics on the infrared transceiver, the test
is actually checking the top system board,
not the infrared transceiver itself.
Therefore, complete the following steps before
running diagnostics or replacing any FRUs.
If the customer cannot
establish a connection between the ThinkPad 701C / 701CS and a remote
system, perform the following steps:
- Ensure that the device the customer attempted to connect
with is an Infrared Data Association (IRDA) compliant device.
- Check to make sure that
both systems are using the same revision level
of the same software.
- Check setup options on both systems to ensure that the baud rate
and other setup parameters are the same.
- Check the Configuration Utility to ensure that the infrared transceiver
is assigned to the same serial
port that is designated in the application software
and that the IRQ assignment is not shared
with any other device such as the internal modem
or external serial port on the MultiPort II.
- Verify that the two systems are in close proximity (less than 1
meter [3.2 feet]
apart for IRDA-compliant devices)
and that the infrared transceiver window on the ThinkPad 701C / 701CS
is aligned with (directly opposite)
the remote device's window.
- Ensure that the windows
on both systems are clean and unobstructed.
If the two systems still will not connect after
you have followed the preceding steps
and the remote system is another computer with a terminal program
(for example, Windows Terminal).
or Procomm) installed,
perform the following tests:
- Set up the terminal application on each system to communicate with
the infrared transceiver serial port at a speed of 115KB per second.
- Type characters on the ThinkPad 701C / 701CS keyboard and check to see
whether or not
these characters appear on the remote system.
(Note that the characters you
type will not appear on the ThinkPad 701C / 701CS system.)
- Type characters on the remote keyboard and check to see
whether or not
these
characters appear on the ThinkPad 701C / 701CS system.
- If characters do not appear in
either step 2 or 3 and you
are certain that infrared is working correctly on the remote system,
replace the inverter card.
- If characters do appear, consult the software vendor to ensure
that the customer is using a compatible software package
and that the setup parameters
are correct.
If data transfers between the ThinkPad 701C / 701CS and the remote system are
slow or unstable:
- Verify that the two systems are in close proximity
(less than 1
meter [3.2 feet] apart
for IRDA-compliant devices)
and that the infrared window on the ThinkPad 701C / 701CS
is aligned with the remote device's window.
- Ensure that the windows
on both systems are clean and unobstructed.
- If you are using TranXit, check the
IRDELAY parameter in the
TRANXIT.INI file in the TRANXIT directory.
The parameter should be set
to 10.
To run the diagnostics test on the infrared transceiver,
perform the following steps:
- Power-off the computer, and
then power it on again.
- Press the F1 key any time
while the POST memory count is proceeding.
When the memory test is completed, the Easy-Setup screen screen appears.
- Press the left or right arrow key to
select Test and press Enter
or position the pointer over the Test icon and
click the left click button once.
- Press Ctrl+A to enter advanced diagnostics.
- Select Infrared and press Enter to run the
test on the infrared transceiver.
Test results will be displayed under the Infrared icon.
- If no errors are detected,
the OK message appears.
- If an error is detected, the FRU code and error description message
appear.
Go to 'FRU Codes' and replace the FRU.
- To exit from the test screen, press Esc.
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