4.5.5 Power Module
Do not switch off power to the 3514 unless directed by the procedures in
this manual.
Use the following procedure to exchange a power module.
1. Has power been switched off to the 3514?
No Yes
Go to step 12.
2. Remove the front cover (see "Front Cover Removal or Installation
Procedure" in topic 4.3).
Note: If you do not know the location of the failing FRU, the
character in the third position of the URC that initiated this repair
action indicates the power module (A, B, or C).
3. Warning: Before you proceed, use the ESD handling kit, IBM part
6428316 or similar.
To exchange the power module, begin the Exchange Power Module command
from the control panel:
a. Using the control panel, enter the following sequence where x is
the location (A, B, or C) of the power module being exchanged:
4 3 9 x PICTURE 281
b. The control panel displays a power module quick status with the
location of the power module to be exchanged indicated by a solid
block ( ¦ ).
Example:
PICTURE 282
Module B is selected
Modules A and C are on
Modules A and C cannot
be turned off without
losing availability.
c. If the 3514 detects an error during the 4 3 9 n command, a return
code is displayed.
To determine if further action is required, go to "Control Panel
Command Return Code Information" in topic 3.4.
+-----------------+
¦ 4 3 9 n x x ¦ Return Code x x
+-----------------+ on disk drive n.
1 2 3 4 5 6 7 8
d. Verify that the LED indicator on the power module you powered off
is off. If it is not off, go to step 12.
4. Remove the rear cover (see "Rear Cover Removal or Installation
Procedure" in topic 4.4).
5. Remove the rear EMC shield:
a. Loosen screw 1 .
b. Remove screws 2 .
PICTURE 283
6. Remove the screw that fastens the selected power module to the guide
and remove the power module.
DANGER
+--------------------------------------------------------------------+
¦ Up to 240 V ac is present at the power module connectors when the ¦
¦ main power cord is connected to a power source. (RSFTD010) ¦
+--------------------------------------------------------------------+
3514 Service Information
Power Module
¦ Copyright IBM Corp. 1992, 1993
4.5.5 - 1