IBM 270, Service Manual

Page: 345 / 622

Position Possible failing
component
DSA (BBBBCcbb) Unit address
C10 Communication, workstation
IOA
IOP found in the following
list: C09, C07, C05.
E6FFFFFF
C10 IXS attached IOA IOP found in the following
list: C09, C07, C05.
E006FFFF
C11 (IXS capable position) IOP yyyy-20-00 FFFFFFFF
C12 (empty if IXS in C11) Storage IOA yyyy-20-00 2FFFFFFF
C12 (empty if IXS in C11) Communication, workstation
IOA
yyyy-20-00 E2FFFFFF
C13 IOP yyyy-23-00 FFFFFFFF
C13 Storage IOA yyyy-20-00 3FFFFFFF
C13 Communication, workstation
IOA
yyyy-20-00 E3FFFFFF
C13 IXS attached IOA yyyy-20-00 E003FFFF
C14 IOP yyyy-24-00 FFFFFFFF
C14 Storage IOA yyyy-20-00 4FFFFFFF
C14 Communication, workstation
IOA
yyyy-20-00 E4FFFFFF
C14 IXS attached IOA yyyy-20-00 E004FFFF
C15 Storage IOA The IOA has the same DSA
as the first IOP found in the
following list: C14, C13,
C11.
6FFFFFFF
C15 Communication, workstation
IOA
The IOA has the same DSA
as the first IOP found in the
following list: C14, C13,
C11.
E6FFFFFF
C15 IXS attached IOA The IOA has the same DSA
as the first IOP found in the
following list: C14, C13,
C11.
E006FFFF
D01 Disk unit The disk unit has the same
DSA as the IOA attached to
the internal cable labelled
″
L-1
″
.
x00300FF (where x is the
same as the first character
of the xFFFFFFF IOA Unit
Address)
D02 Disk unit The disk unit has the same
DSA as the IOA attached to
the internal cable labelled
″
L-1
″
.
x00400FF (where x is the
same as the first character
of the xFFFFFFF IOA Unit
Address)
D03 Disk unit The disk unit has the same
DSA as the IOA attached to
the internal cable labelled
″
L-1
″
.
x00500FF (where x is the
same as the first character
of the xFFFFFFF IOA Unit
Address)
D04 Disk unit The disk unit has the same
DSA as the IOA attached to
the internal cable labelled
″
L-1
″
.
x00600FF (where x is the
same as the first character
of the xFFFFFFF IOA Unit
Address)
Analyze hardware problems
333