LEFM 3xxCi User Manual
IB1406 Rev 12
Section 7
Page 51
February 2017
2.
Unscrew the Display board from the CTC. Grasp the edges of the Display and gently pull to lift it
from the CTC. If the display is faulty, replace the Display and skip to step 6. Otherwise, put Display
into an anti-static bag for later use.
3.
Unscrew the four screws to free the CTC assembly from the transmitter body, and lift the assembly
from the enclosure. On the rear of the CTC, disconnect the ribbon cable from connector P1.
For newer versions of the IOP (see previous section) – there may be a metrological seal wire
(plastic) connecting the IOP and the CTC. This plastic wire will need to be cut/broken.
4.
Remove the new CTC from its packaging. Place the old CTC into this packaging for proper
storage.
5.
Connect the ribbon cable to the back of the CTC card. Gently press the CTC assembly onto the
IOP connector. Refer to Figure 7.5 below for a view of the routing path.
For newer versions of the IOP (see previous section) – there may be a metrological seal wire
(plastic) to be reinstalled to reconnecting the IOP to the CTC.
Ensure the ribbon cable is routed to the right side of the IOP board when looking from the CTC end
of the enclosure. If not routed properly, the ribbon cable can get pinched by the IOP/CTC
connector.
Figure 7.5 MXR-CTC Ribbon Cable Routing Path
Reinstall the four screws that were removed in step 3, screwing them into the holes provided in the
CTC board.
6.
Reattach the display by aligning the connector on the rear of the display board to connector P2 on
the CTC.
7.
Reinstall the three screws that secure the Display Board to the CTC.
CAUTION
