PC Specialist's Handbook ErgoPro e-, x- and s- Series
First Edition, Release 4 - June 1998 Page 17
System board jumpers (AC41655/58/59/81/82/87/89)
RST
S2
S1
CPU type/ratio 1
Bootblre
CLR
CMOS Normal
Rear Side of the board
1
2
3
4
5
6
7
8
9
10
Bootbln
CFGL
S0
Legend :
No jumper
by default
Jumper on
by default
11
12
CPU type/ratio 2
Not Used
Picture 21 : Jumper block 1 for AC41655/58/59/81/82) System board
RST: Short-circuit pins for a second to generate a HARD RESET (Cold boot).
S2, S1, S0 & Speed &
CPU Type/ratio: processor selection (see below)
Processor speed 75 MHz 100MHz 120MHz 133MHz 150MHz 166MHz
(50*1.5) (66.7*1.5) (60*2) (66.7*2) (60*2.5) (66.7*2.5)
S2
S1
S0
CPU type/ratio 1
CPU type/ratio 2
CLR: To clear the CMOS, switch off the power, take out the jumper from CMOS normal pins
and install it in this position; keep it there for few seconds, then put it back to CMOS
normal position.
CFGL: When the jumper is installed, the system lock is enabled, and all the setup menus under
ADMIN menu of the RSU (Setup) are write protected.
BOOTBLN: Supplies +5V to the FLASHRAM. The jumper must be installed for normal operation of the
FLASHRAM.
BOOTBLRE: If the loader (boot block) of the FLASHRAM BIOS needs to be updated, boot up the
system, then remove the BOOTBLN jumper, and install the jumper in this position and
use FLASH.EXE file or the BIOS reload function of the resident setup utility to update the
BIOS. Put the jumper back in the BOOTBLN position before switching off the system.
Temperature sensor selection
This jumper selects the temperature sensor for fan speed regulation circuit. There are 2 sensors on these
boards, one close to CPU Socket and one close to PSU Connectors.
Selection jumper
1
2
3
KBC
Picture 22: Temperature Sensor Selection jumper (AC41655/58/59/81/82/87/89)
For model : Jumper must be installed on pins :
251 1-2
450/451 2-3
651 2-3
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