Product data
Frame Assembly
Notes:
1. Use this procedure only if you are exchanging the frame of the 2104. If you are
removing a complete 2104 Model DU3 from the rack (for example, to locate it
elsewhere), go to “Removing a 2104 Model DU3 from a Rack” on page 115.
2. You will need another person to help you remove the frame from the rack.
Attention: Unless the using system needs to be switched off for some other reason, do
not switch off the using system when servicing the 2104. Power cables and external
SCSI cables that connect the 2104 to the using system can be disconnected while that
system is running.
Step 1. Verify with the customer that all operations between the 2104 and the using
system have been stopped.
Step 2. Remove power from the 2104 (see “All Power” on page 71).
Step 3. For the 2104 Model TU3, open the front cover (see “Cover” on page 68).
Step 4. Carefully make a note of the locations of the disk drive modules and (if
present) dummy disk drive modules that are in the 2104. This action ensures
that you reinstall the modules into their original slots. It is recommended that
you attach identifying labels to the modules.
Step 5. Remove all the disk drive modules and dummy disk drive modules (see
“Removing a Module” on page 75).
Step 6. Remove the SCSI bus bridge card assembly (see “SCSI Bus Bridge Card
Assembly” on page 85).
Step 7. Remove the fan-and-power-supply assemblies, or fan assembly and
fan-and-power-supply assembly, from the back of the 2104 (see
“Fan-and-Power-Supply Assemblies” on page 89 and, if required, “Fan
Assembly” on page 94).
Step 8. Remove the switch card assembly (see “Switch Card Assembly” on
page 102).
Step 9. Make a note of which SCSI cable (if present) is connected to each particular
SCSI interface card.
Step 10. Disconnect the external SCSI cables (if present) from the SCSI interface
cards.
Step 11. Attention: In the new frame assembly, each SCSI interface card assembly
must occupy the position that it occupied in the original frame assembly.
Make a note of the positions of the SCSI interface card assemblies before
you remove them. Attach labels if necessary.
Step 12. Remove the SCSI interface card assemblies (see “SCSI Interface Card
Assembly” on page 97).
Step 13. If you are removing the frame assembly of a 2104 Model DU3, go to “2104
Model DU3” on page 107.
If you are removing the frame assembly of a 2104 Model TU3, go to “2104
Model TU3” on page 112.
106 2104 Service Guide