IBM Application System/400 Service Information page 93

unit and installed on the new disk unit (see "Disk
Unit Address Jumper Wire Connections (Type
61xx Disk Units)" on page 5-14 or "Disk Unit
Address Jumper Connections (Type 66xx Disk
Units)" on page 5-14).
1
Perform an initial program load (IPL) to
dedicated service tools (DST) by doing the
following:
a. Power off the system if it is powered on
(see "Power off" on page 5-2).
b. Select IPL Type A and Mode M (see
"Selecting IPL and Mode" on
page 5-2).
c. Power on the system (see "Power on"
on page 5-2).
Does a system reference code (SRC)
appear on the control panel?
No Yes
Go to step 4 of this procedure.
2
Does the Display Missing Disk Units
display or the Suspend Missing Disk Units
display appear on the console (see ''VLlC
PIP Display Examples" on page 3-30)?
No Yes
~
If all the reference codes are 0000,
go to "VLlC-PIP11" on page 3-24
and use cause code 0002. If any
of the reference codes are not
0000, go to step 4 of this procedure
and use the reference code that is
not 0000.
Note: Use the characters in the
Type column to find the correct ref-
erence code table.
3
Look at all the error logs by selecting the
Error log utility option under DST (see
"System Tools" in the Service Functions
User's Guide).
Is an SRC logged as a result of this IPL?
Yes No
~ The problem cannot be isolated any
more. Use the original SRC and
exchange the parts, starting with
the highest probable cause of
failure (see the failing item list for
this reference code). If the failing
item list contains FI codes see
"Failing Item (FI) Code Table" on
page 2-55. If you need help in
finding disk unit part number
locations in the system, see "Disk
Unit FRU Locations" on page 3-7.
This ends the procedure.
4
Record the SRC on the Problem Summary
Form (see Appendix 0, "Problem Summary
Form" on page 0-1).
Is the SRC the same one that sent you to
this procedure?
Yes No
Go to Chapter 2, "Unit Reference
Codes" on page 2-1. Use the new
SRC to correct the problem.
This ends the procedure.
5
See "Disk Unit FRU Locations" on
page 3-7 to help find the parts identified by
FI code FI011 06.
6
Perform the following:
a. Power off the system.
b. Disconnect the tape unit or one of the
disk units, other than disk unit 1 (Ioad-
source disk unit) in the system unit,
identified by FI code FI011 06 by dis-
connecting the attachment cables.
Note: Do not disconnect disk unit 1
(load-source disk unit) in the system
unit even if it is identified by FI code
FI01106 (see "Device Locations and
Addresses" on page 5-15).
7
Power on the system.
Does an SRC appear on the control panel?
No Yes
~
Go to step 10 of this procedure.
Chapter 3. Problem Isolation Procedures
3-3