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4. Rotating the threader motor worm gear
cartridge. As the tape LBA is secured in the cartridge, you hear the LBA retention spring clips click
into place. If you do not hear the click, continue rolling until the threader motor worm gear
The LBA is in the correct position. Notice the -
• Loader mechanism gear
mechanism
• Position of the rotator stub
• Front loader motor worm gear
5. With a small screwdriver on the end of the shaft, or with your finger, rotate the loader motor worm
gear
1
to turn the loader mechanism gear
stub
3
passes under the aluminum bracket
6. Rotate the threader motor worm gear
This action moves the LBA out of the cartridge and past the read/write head. Stop this rotation when
the LBA (Item
Figure 72: Leader block assembly (LBA)
7. See Figure 71 on page 200. Continue rotating the loader motor worm gear
is positioned, as shown in Figure 71 on page 200. Notice that the rotator stub
with the cartridge loader tray guide bearing
8. Remove the cartridge from the cartridge loader tray.
9. Reassemble the drive by reversing Step 5 in "Manual cartridge removal" on page 195.
10. Reassemble the drive canister by reversing Step 2 in "Manual cartridge removal" on page 195.
11. Install a new drive canister. See "Replacing or reinstalling the drive canister" on page 254.
12. Repack and return the failed drive through your IBM parts network. For information about
repackaging the failed drive canister, see "Repacking instructions" on page 181.
Tape broken in midtape
Note: The term midtape refers to tape that was not in the first or final 1.8 m (6 ft) of tape.
Use this procedure if the tape is broken in midtape, and not near either end. Use Figure 70 on page 199,
as you follow this procedure.
1. With the front of the drive facing you, pull 0.6 m (2 ft) of tape out of the drive, from the take-up reel
on the left side of the drive.
Note: If less than approximately 5 cm (2 in.) of tape is on the take-up reel, go to "Tape pulled from
leader pin or broken near leader pin" on page 199.
2. From the supply reel inside the cartridge, pull approximately 0.3 m (1 ft) of tape.
3. From the take-up reel, thread tape around the rear of the tape path and over the head rollers on the
left side of the drive.
8
nearest the front of the drive, which actuates the cartridge loader
3
1
. Rotating this gear allows the loader mechanism gear
4
1
in Figure 72 on page 201) is near the tape guide roller nearest the drive rear end.
4
clockwise draws the leader block assembly (LBA) into the
8
counterclockwise. Continue turning until the rotator
7
. This action releases the LBA leader pin.
to turn the threader mechanism gear
1
2
.
1
stops.
8
to turn
6
counterclockwise.
1
until the rotator stub
3
is nearly aligned
Procedures 201
3
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