IBM B-Series, Maintenance Information

Page: 467 / 648

FID EC: Drive Servo Card and FID E9: Mother Board
Removal of the Drive Servo Card and Mother Board
Note: DO NOT USE ANY MAGNETIZED TOOLS ON OR NEAR THE HEAD ASSEMBLY (INCLUDING
THIN FILM CABLES) AS THEY WILL DESTROY THE HEAD!
Because of limited removal space and obstructions in the drive pack, the drive servo card and mother
board should be removed together before either is replaced.
See Figure 289 on page CARR-15, item
8
for location of the drive servo card and item
11
for the
mother board.
To remove the drive servo card and mother board follow the steps below if not done before:
Attention: The logic cards are ESD sensitive. Special care must be used when handling ESD parts.
See “Working with Electrostatic Discharge (ESD) Parts” on page PROC-4.
1. Perform the prerequisite procedures for your 3570 model listed on Figure 288 on page CARR-13.
2. Perform removal of the “Drive Assembly Front Cover” on page CARR-15.
3. Perform removal of the “Drive Assembly Top Cover” on page CARR-16.
4. Perform removal of the “FID EA: Drive Logic Card” on page CARR-16.
5. Refer to Figure 295 on page CARR-24 and perform removal of the “FID EB: Drive Analog Card” on
page CARR-20.
6. The order in which the head cables are removed should be maintained when they are re-installed.
The proper order to reinstall is:
a. Item
15
b. Item
5
7. The small rubber coated block, item
6
, located between the head-actuator assembly thin film cables
and the metalic shield must go back in the same orientation that it was removed. The rubber portion
must be up, and the elongated hole must be to the rear of the drive. as shown in Figure 295 on
page CARR-24.
8. Remove the flat head cables, items
5
and
15
, rubber coated block, item
6
, and metal shield, item
7
.
9. Disconnect the four cables that run from the loader assembly to the drive servo card.
10. Disconnect the cable going to the IPS Sensor on the head actuator assembly. (You may need to
remove the mother board to access the cable.)
11. Tilt the drive unit up so that the bottom of the bottom loader plate, item
9
is showing. Refer to
Figure 297 on page CARR-28, and remove two screws, item
1
, from the bottom of the loader plate.
12. Refer back to Figure 289 on page CARR-15 and remove the remaining screw, item
14
that secures
the drive servo card and mother board to the bottom loader plate.
13. Remove the drive servo card and mother board together.
14. Remove the drive servo card from the mother board.
Note: You may need to lightly pry the card away from the mother board connector, item
11
at each
end of the connector to loosen the drive servo card for removal.
CARR
Checks, Adjustments, Removals, and Replacements
CARR-27