IBM 866251Y - Netfinity 5500 M20, Руководство по техническому обслуживанию аппаратной части

Страница: 264 / 386

Table 14. Processor board jumpers
Jumper Name Description
.2ð/
J24 Reserved The default position is a jumper on pins 1 and
2.
.22/
J37 Reserved The default position is a jumper on pins 1 and
2.
.23/
J21 Reserved The default position is a jumper on pins 2 and
3.
.24/
J20 Reserved The default position is a jumper on pins 1 and
2.
.39/
–
.42/
J31–J28
Microprocessor
core frequency
selection
For the core/bus fraction 4 (400/100 MHz),
jumpers are installed on pins 1 and 2 of J28,
J30, and J31 and on pins 2 and 3 of J29.
For the core/bus fraction 4.5 (450/100 MHz),
jumpers are installed on pins 1 and 2 of J28
and J31 and on pins 2 and 3 of J29 and J30.
For the core/bus fraction 5 (500/100 MHz),
jumpers are installed on pins 1 and 2 of J30
and J31 and on pins 2 and 3 of J28 and J29.
.43/
J27 Reserved The default position is a jumper on pins 1 and
2.
.44/
J25 Reserved The default position is a jumper on pins 1 and
2.
.45/
J26 Reserved The default position is a jumper on pins 2 and
3.
.47/
J34 Reset
system
The default position for normal operation is no
jumper on J34.
Installing a jumper on pins 1 and 2 will force
the system into the reset state.
Table 15. Microprocessor core frequency selection
switch (SW1) settings
Core/bus
fraction
J28
Jumper
J29
Jumper
J30
Jumper
J31
Jumper
4 Pins 1
and 2
Pins 2
and 3
Pins 1
and 2
Pins 1
and 2
4.5 Pins 1
and 2
Pins 2
and 3
Pins 2
and 3
Pins 1
and 2
5 Pins 2
and 3
Pins 2
and 3
Pins 1
and 2
Pins 1
and 2
Note: For jumper settings for other speed microprocessors, refer to the
label on the inside top cover of the server.
256
Netfinity Server HMM