On-Board
Diagnostics
A test that allows you to test the control registers, the network
controller, the diskette drive system, memory, the cache, the system
clock, and watch the network for valid packets.
Pok
Power ok is a signal from the power supply, which is activated after
DC voltages have risen.
POST
Power-On Self-Test. The POST runs automatically when you turn on
the system power switch or reboot the system. The POST, stored in
the boot PROM, is a series of rudimentary tests designed to verify
that a viable boot path exists for loading more extensive diagnostic
software, such as the Diagnostic Executive.
PTC
Positive Temperature Coefficient. A self healing device that replaces
a fuse. After an error occurs, the PTC resets.
printed circuit board Any board with electronic wiring etched on it.
PROM Programmable Read Only Memory.
RAM Random Access Memory.
ROM
Read Only Memory.
SBus card A printed circuit board installed in an SBus slot of the system unit.
SCC Serial Communications Controller.
SCSI
Small Computer System Interface; pronounced “scuzzy.”
SIA
Serial Interface Adapter.
SunDiagnostic
Executive
An independent operating system running exhaustive subsystem
tests independent of SunOS. Use the SunDiagnostic Executive after
you have run POST and need to troubleshoot which part needs to
be replaced.
Sundiag System
Exerciser
Diagnostic software that runs under SunOS system software;
displays real-time use of system resources and peripheral equipment
such as Desktop Storage Packs and External Storage Modules.
system Monitor
See Monitor 1) or 2).
Glossary-202
SPARCstation 10 Service Manual ♦ Revision A, July 1993
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