IBM TotalStorage NAS Gateway 500, Service Manual

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Chapter 2. Problem determination overview
The system uses an integrated set of software diagnostic procedures to help isolate failing components
and system maintenance. This book, along with the
RS/6000
Eserver
pSeries Diagnostic Information for
Multiple Bus Systems , which is included on the NAS Gateway 500 documentation CD-ROM, is the basis of
the diagnostic procedures for the system. In particular, Chapter 4, “Checkpoints”, on page 93, Chapter 5,
“Error code to FRU index”, on page 125, Chapter 6, “Using the online and standalone diagnostics”, on
page 239, and Chapter 12, “Parts information”, on page 373, in this book are important for the trained
service representative to understand and use when isolating a failure on the system.
Maintenance Analysis Procedures (MAPs)
Maintenance Analysis Procedures (MAPs) guide the trained service representative through the system.
These MAPs are the entry point for all isolation and error recovery procedures. The MAPs are consistent
with existing procedures and methods. The system uses a set of integrated procedures, mentioned earlier,
to which the MAPs are the primary entry point.
The MAPS are as follows:
v Entry MAP
v
Quick Entry MAP
v Map 0410: Repair Checkout
v
MAP 1020: Problem Determination
v MAP 1240: Memory Problem Resolution
v
MAP 1520: Power
v
MAP 1521: The Base System Drawer Will Not Power On and No Error Codes Are Available
v MAP 1523: The SPCN Error Codes Table Directed You Here and the Error Code is 1011 1B0x
v
MAP 1540: Problem Isolation Procedures
v MAP 1541: JTAG Problem Isolation
v
MAP 1542: I/O Problem Isolation
v MAP 1548: Processor Subsystem Problem Isolation
The Entry MAP is the starting point for problem determination. The purpose of this MAP is to quickly point
to the appropriate MAP or service reference information either in this book, or in the common book set,
which includes the
RS/6000
Eserver
pSeries Diagnostic Information for Multiple Bus Systems .
The Quick Entry MAP is a subset of the Entry MAP and helps to save time for some types of problems.
The Problem Determination MAP provides a structured analysis method to get an error code if one is not
provided by the customer, or if diagnostics cannot be loaded.
The Power MAP deals with isolation of components to diagnose a power problem. Power problems can be
related to powering on and powering off the system, or power failures that occur after power is turned on.
The Processor Subsystem Problem Isolation MAP is used to locate defective components not found by
normal diagnostics or error-isolation methods. This MAP provides a systematic method of isolation to the
failing item.
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