235
Sentinel 9018524 (05-2019)
SERVICE
REPLACING THE UI (USER INTERFACE)
CIRCUIT BOARD
FOR SAFETY: Before leaving or servicing
machine, stop on level surface, set parking
brake, turn off machine, and remove key.
FOR SAFETY: When servicing machine,
disconnect battery connections before working
on machine.
1. Remove the hardware securing the
touchscreen assembly to the touchscreen back
housing.
NOTE: To avoid damaging electronic components,
a static ground strap must be worn at all times
while handling these components. Attach the
other end of the static ground strap to the machine
chassis.
2. Carefully tilt the touchscreen assembly out
from the touchscreen back housing. Do Not
brake any cable/connector connections when
tilting the touchscreen assembly.
3. Disconnect the main wire harness connections
from the UI circuit board and the control circuit
board.
4. Label the main wire harness camera connector
lead. The camera connector must be
reconnected to the same location on the new
UI circuit board.
5. Remove the control circuit board from the
touchscreen assembly.
6. Disconnect the gold LCD FFC cable from
terminal J1101 on the UI circuit board.
NOTE: Terminal J1101 is equipped with a back fl ip
lock type connector. Only the black colored portion
of the connector is designed to move. Applying
force to any other part of the connector could
damage the connector.
7. Disconnect the gold touch sensor FFC cable
from terminal J1100 on the UI circuit board.
NOTE: Terminal J1100 is equipped with a front fl ip
lock type connector. Carefully fl ip the dark brown
lock up and remove the cable. Applying excessive
force to the lock could damage the connector.
8. Remove the damaged/malfunctioning UI circuit
board from the touchscreen assembly.
9. Install the new UI circuit board into the
touchscreen assembly.
10. Ensure the terminal latches at terminal J1100
and terminal J1101 on the UI circuit board are
in the open position.
11. Insert the gold touch sensor FFC cable and the
gold LCD FFC cable into the UI circuit board
terminals until both are completely seated.
12. Carefully push both latch bars closed.
13. Check the cable connections. Gently tug the
touch sensor FFC cable and LCD FFC cable
to ensure they are securely locked into the
terminal.
NOTE: The touch sensor FFC cable at J1100 may
have some side-to-side play, even when correctly
inserted and latched.
14. Reinstall the control circuit board onto the
longer standoffs in the touchscreen assembly.
The two large harness connectors must be on
the same side as the USB cables.
15. Reconnect all main wire harness connections
to the control circuit board. The previously
labeled camera cables must be reconnected
to the same terminals where they were
previously connected. If the camera cables
are not connected to the correct locations, the
cameras will the reversed on the UI.
Содержание sentinel
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