2. At the equipment frame, attach the static discharge wrist strap securely to the
ESD lug mounted at the top of the frame.
3. Power down OOS SG of the MCTSI. To do this, press the OFF button on the
410AA.
Response: 410AA OFF lamp lights.
4. Unseat the corresponding KBN8 circuit pack. This will prevent possible damage
to this circuit pack during the CPI paddle board replacement.
— The KBN8 for MCTSI SG 0 is at position 28-084.
— The KBN8 for MCTSI SG 1 is at position 19-084.
5. At the MCTSI backplane, disconnect the CPI cable that connects to the 982AAH
CPI paddle board.
— The 982AAH for MCTSI SG 0 is at position 28-084.
— The 982AAH for MCTSI SG 1 is at position 19-084.
Warning: The CPI paddle boards are very thin. Handle with care!
6. Gently remove the CPI paddle board.
7. Using the same degree of caution, install the new CPI paddle board. Be careful
not to bend the pins or damage the backplane.
8. Connect the CPI cable to the new CPI paddle board.
9. At the front of the frame, reseat the KBN8 circuit pack.
10. At the out-of-service 410AA, power up the MCTSI SG by pressing the ON button.
Response: The OFF lamp is extinguished.
11. Test the new paddle board. At the MCC terminal, type and enter:
DGN:MCTSI=a-b,PH=9,TLP;
Where: a = The switching module number.
b = The MCTSI number (0 or 1).
12. Is the diagnostic response ATP?
If YES, STOP. YOU HAVE COMPLETED THIS PROCEDURE.
If NO, continue with Step 13.
13. Replace the appropriate CPI cable to the workstation.
14. Test the new cable. Type and enter the input command used in Step 11.
15. Is the diagnostic response ATP?
If YES, STOP. YOU HAVE COMPLETED THIS PROCEDURE.
If NO, continue with Step 16.
16. Replace the cross-couple CPI cable between the two CPI paddle boards.
17. Test the new cable. Type and enter the input command used in Step 11.
18. Is the diagnostic response ATP?
If YES, STOP. YOU HAVE COMPLETED THIS PROCEDURE.
CORRECTIVE MAINTENANCE
Procedure 6.7
235-200-150
January 2003
Page 6.7-2 Issue 3.00
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