Emerson Rosemount CT5100, Reference Manual

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K. Ribbon cable (to peripheral PCB)
L. 12 V power out connector J17
M. 12 V power in connector J16
N. 12 V power input wiring harness
O. 12 V power output wiring harness
P. Laser module ribbon cable
Q. HMI Display wiring harness
R. Connector J22
S. Ethernet cable
T. Ethernet connector
Procedure
1. Shut down the analyzer.
Refer to Shutdown procedure .
2. Open the door of the electrical compartment.
3. Tag or otherwise identify all wiring harnesses before disconnecting.
4. On the motherboard, disconnect the TEC board ribbon cable (E) from connector J12
(B).
Refer to
Figure 12-6 .
5. Disconnect the Detector Module 1 Signal Out wiring harness (I) from connector J31
(G).
NOTICE
The Detector Module 2 Signal Out wiring harness (H) is an optional item that only
forms part of those analyzers that are fitted with an O
2
detector.
6. Disconnect the Detector Module 2 Signal Out wiring harness (H) from connector
J32 (F).
7. Disconnect the Laser Module ribbon cables (P) from the motherboard.
The number of Laser Module ribbon cables to be disconnected will vary depending
upon the application that the analyzer has been configured for.
8. Disconnect the 12 V power output wiring harness (O) from connector J17 (L).
9. Disconnect the 12 V power input wiring harness (N) from connector J16 (M).
10. Disconnect the peripheral PCB ribbon cable (K) from connector J7 (J).
11. Disconnect the Ethernet cable (S) from the Ethernet connector (T).
12. Disconnect the HMI display wiring harness (Q) from connector J22 (R).
13. Remove and retain the six screws (D) and associated spring washers (C) and flat
washers (A).
14. Remove and discard the unserviceable motherboard.
15. Inspect the replacement motherboard for signs of damage or delamination.
16. Place the motherboard in position on the backplate and secure by fitting the six
screws (D) and the associated spring washers (C) and flat washers (A) retained in
Step 13 . Torque tighten the screws to 0.6 Nm.
Repair and replacement Reference Manual
October 2019 00809-0100-4512
138 Rosemount CT5100(Ex)