AM-6000 Service Manual
Page 7
Rev. A02
Remote Reset Capability
The AM-319-20 board has an option to enable the computer's remote hardware reset. To enable remote
reset, you must do two things:
1.
Install the JP7 jumper, which is shown in the AM-319-20 illustration (Figure 5). The factory
default is not installed.
2.
Connect a push-button switch between pin-1 and pin-7 (signal ground) at the terminal end of the
terminal cable attached to serial port 0 on the AM-319-20 board.
Once you’ve enabled remote reset, you can reset the computer by activating the push-button switch.
Replacing the Time and Date Battery
When replacing the backup batteries, always be sure to power-down the system first! DO NOT
replace the batteries with the power on! As always when opening your computer chassis, take
proper precautions against electrostatic discharge, which can seriously damage system
components.
The AM-319-20 board uses two 3-volt lithium batteries (BR-1225) to provide power to its time/date
circuit. The batteries are no bigger than a dime (1.2 cm), and are secured side-by-side in a plastic holder
at location U80, as shown in Figure 5.
The batteries need to be replaced when the status panel displays B1 or B0. You must replace both
batteries at the same time. For battery replacement, please follow these steps:
Before turning off your computer, make a note of the current CMOS settings. Removing the
batteries will erase all CMOS data.
1.
Insert a knife with a thin blade (such as a small scribe or Xacto™ knife) from the top, down
through the square hole between the right edge of the battery and the plastic holder's top piece.
(The right side is the side toward the resistor pack at RN12.)
2.
Gently pry the right side of the battery so it slides to the left and pushes against the left side
spring contacts.
3.
As you slide the battery to the left and it clears the plastic top hole, pry the right edge of the
battery upward and out through the hole in the top. The battery will typically "pop" up and out.
