Models 840 Or Sb3 External Battery Power Unit; Models 840/Sb3 System Unit - Power Subframe Assembly (Pb1) - IBM iSeries 270 Service Manual

1. To remove a disk unit using dedicated maintenance perform the following:
a. Power off the system. See Power on/off the system and logical partitions.
b. Disconnect the power cord.
c. To remove the disk unit, pinch the two surfaces of the latching mechanism together and pull the
handle towards you to release the disk unit from the slot.
d. Remove the unit. See Figure 1. Disk unit removal, Models 830/SB2 and 840/SB3 (concurrent) (See
page 63) above.
2. Are you finished with the repair?
v No: Continue with the next step.
v Yes: Replace the covers that were removed during this procedure and return to the procedure that
sent you here.
This ends the procedure.
3. To install a disk unit using dedicated maintenance perform the following:
a. Power off the system. See Power on/off the system and logical partitions.
b. Disconnect the power cord.
c. Put the disk unit part way into the desired slot and rotate the handle of the disk unit towards you.
d. Push the disk unit completely into the slot and rotate the handle towards the disk unit to latch it into
the slot.
e. Replace the covers that were removed during this procedure and return to the procedure that sent
you here.
This ends the procedure.

Models 840 or SB3 external battery power unit

For use by authorized service providers.
Use this procedure to remove the external battery power unit from the Models 840 or SB3.
1. Look to see if the panel backlight is on to verify that ac power is applied.
2. If the system is either powered off or running on battery power, you must apply ac power to the AC
module before continuing with this procedure.
3. Remove the rear cover (see Models 840/SB3 - Covers - Rear), and then perform the next step from
the *** REAR *** of the system.
Attention: Removing the external battery power unit charger or cable while the system is running on
battery power causes the system to fail and may damage the external battery power unit and the card
enclosure. If the console will accept system commands, the system is not running on battery power.
4. To remove the battery, unplug the cable from the battery charger connector J3.
This ends the procedure.
CAUTION:
The weight of this part or unit is more than 55 kilograms (121.2 pounds). It takes specially
trained persons with a lifting device to safely lift this part or unit.(RSFTC206)
CAUTION:
The battery is a lead-acid battery. To avoid possible explosion, do not burn. Exchange only with
the IBM-approved part. Recycle or discard the battery as instructed by local regulations.
In the United States, IBM has a process for the collection of this battery. For information, call
1-800-426-4333. You will need to have the IBM part number for the battery unit available when
you call.(RSFTC225)

Models 840/SB3 system unit - Power subframe assembly (PB1)

For use by authorized service providers.
Use this procedure to remove or replace the power subframe assembly (PB1) in the Models 840/SB3.
Analyze hardware problems
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