Touch screen operator panel service check
FRU Action
Operator panel
Display
Operator panel
keyboard
Controller board
WARNING:
Do not replace the
engine board and
controller board at the
same time. Each board
contains the machine
settings. When either of
these boards is new, it
obtains the settings
from the other board.
Settings are lost when
both are new and
replaced at the same
time.
Touchscreen display
If the touchscreen display does not come on or indicator LED on the
keyboard doesn’t illuminate, then open the controller board cage and
locate the operator panel connector at J34. Make sure the cable is
properly connected to the controller board and the controller board has
input voltage to it.
With the machine on, verify the following on connector J34:
• Pins 1, 3, 5, and 6: 3.3 v
• Pin 10, 16, 17, and 18: 5 v
•
Pins 2, 9, and 15: GND
If any are incorrect, then see “Controller Board Service Check” in
“Troubleshooting”.
If these are approximately correct and the operator panel is not functioning:
1. Turn the machine off.
2. Remove the left and right covers.
3. Tilt the operator panel keyboard and verify the UICC cable is properly
connected to the keyboard at connector J10.
4. If the cable is properly connected at both ends, check the cable for
continuity. If the cable fails, replace the UICC cable.
5. Reconnect the UICC cable, and verify the display ribbon cables are
properly connected to J3 and J12 on the keyboard.
6. Restart the machine. If the eight LEDs on the bottom of the keyboard
card illuminate, but the display fails to illuminate, replace the
touchscreen display.
7. If the eight LEDs fail to illuminate, replace the keyboard.
Button keypad
If the touchscreen is ok, POR into Diagnostic mode, and perform the Button
test under the Hardware tests. If the buttons do not respond, then replace
the keyboard.
6. Troubleshooting
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