Elo TouchSystems IntelliTouch Ultra, Product Manual, Page: 74 / 105

Hardwar Hardware Troubles e Troubleshooting hooting
63 63
then return to the normal flash rate. If the host does not remove the packet from then return to the normal flash rate. If the host does not remove the packet from
the controller, the LED will stay lit.
the controller, the LED will stay lit.
The LED will also stay lit without a touch if the touchscreen or cabling is The LED will also stay lit without a touch if the touchscreen or cabling is
disconnected or not functioning.
disconnected or not functioning.
If the LED flashes about two times per second, a warning error condition is If the LED flashes about two times per second, a warning error condition is
indicated, such as improper communication from the host. Suspect an invalid indicated, such as improper communication from the host. Suspect an invalid
command sequence from the host.
command sequence from the host.
E281-2300 CD-i Controller E281-2300 CD-i Controller
The E281-2300 controller has two diagnostic LED's, a green touch activity LED The E281-2300 controller has two diagnostic LED's, a green touch activity LED
and a yellow communication LED.
and a yellow communication LED.
The green touch activity LED is off when the controller is first powered on. The The green touch activity LED is off when the controller is first powered on. The
LED is then on while the controller power-on self-tests are executed. Upon
LED is then on while the controller power-on self-tests are executed. Upon
completion of the tests, the LED goes off again. (See
completion of the tests, the LED goes off again. (See
Diagnos Diagnostic Codes tic Codes
, page 64 , page 64
for information on the results of these tests.) Thereafter, the green LED blinks at a for information on the results of these tests.) Thereafter, the green LED blinks at a
rate of about twice per second while the touchscreen is being touched.
rate of about twice per second while the touchscreen is being touched.
The yellow communication LED also blinks about 1.5 times a second, after the The yellow communication LED also blinks about 1.5 times a second, after the
self-test has completed, indicating normal operation.
self-test has completed, indicating normal operation.
During normal operation, the yellow LED also indicates controller/host communi- During normal operation, the yellow LED also indicates controller/host communi-
cation is in progress. For example, when the touchscreen is touched, the yellow
cation is in progress. For example, when the touchscreen is touched, the yellow
LED should be on or flicker, then return to the normal blink rate when the touch is
LED should be on or flicker, then return to the normal blink rate when the touch is
removed. If the host does not remove the packet from the controller, the yellow
removed. If the host does not remove the packet from the controller, the yellow
LED will stay on.
LED will stay on.
If the yellow LED stays on without a touch, cycle power to the controller. Do not If the yellow LED stays on without a touch, cycle power to the controller. Do not
touch the screen. If the problem persists, a fault in the power supply is likely.
touch the screen. If the problem persists, a fault in the power supply is likely.
If the yellow LED flashes about four times a second, a warning error condition is If the yellow LED flashes about four times a second, a warning error condition is
indicated, such as improper communication from the host. The baud rate or other indicated, such as improper communication from the host. The baud rate or other
communication parameters may be suspect.
communication parameters may be suspect.
E281-2303 ADB Controller E281-2303 ADB Controller
The LED on the IntelliTouch ADB Controller is useful for troubleshooting ADB The LED on the IntelliTouch ADB Controller is useful for troubleshooting ADB
connections. It should flicker and go off when the system is started, and then
connections. It should flicker and go off when the system is started, and then
flicker when the touchscreen is touched. If the light stays on continuously, a
flicker when the touchscreen is touched. If the light stays on continuously, a
defective controller or power supply is probable.
defective controller or power supply is probable.