Bl Board Removal And Replacement Procedures; Al Board Removal And Replacement Procedures - IBM System/36 Maintenance Information Manual

342 A 1 Board Removal and Replacement Procedures
To remove the A1 board:
1.
Power off the 5363 and disconnect the power cord at the customer power outlet and the 5363.
2. Remove the covers ("305 Cover Removal" on page 3-2).
3. Remove all power cables from the Al and BI boards.
4. Remove all signal cables from the Al board.
5. Remove all top card connectors from the cards on the Al board.
Note: Label all cards as to which location they were removed from. This will be of help to you when
you reinstall the cards.
6. Remove and label all cards from the Al and BI boards.
7. Remove the logic card gate fan ("310 Logic Card Fan Removal and Replacement Procedures" on
page 3-4).
8. Disconnect the manufacturing test connector.
9. Disconnect the twinaxial connector.
10. Remove the BI board ("340 BI Board Removal and Replacement Procedures" on page 3-16, step 5).
11. Remove the six screws from the Al board frame.
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5363 Maintenance Information