IBM 8688 Manuale Utente
Midplane
board
connectors
and
LEDs
The
following
illustration
shows
the
connectors
on
the
midplane
board.
Force NMI switch
Force power-on
connector
connector
Memory connector
Microprocessor
connector
connector
Microprocessor
power
connector
power
connector
Midplane thumbscrews
Power backplane
signal connector
signal connector
Power backplane
ground connector
ground connector
Power backplane
12V connector
12V connector
SCSI backplane and
I2C connector
I2C connector
3.3V VRM
connector
connector
Light Path
card connector
card connector
The
following
illustration
shows
the
LEDs
on
the
midplane
board.
I/O board error LED
Remote Supervisor Adapter error LED
PCI-X planer board error LED
Midplane board error LED
Processor board error LED
Memory board error LED
VRM error
LED
LED
Diagnostic
display
display
DMC heartbeat LED
Machine check
abort initiated
(NMI) LED
abort initiated
(NMI) LED
Midplane power good LED
84
IBM
xSeries
450
Type
8688:
Hardware
Maintenance
Manual
and
Troubleshooting
Guide