SmartSeis
TM
Maintenance Manual
7
Memory
Random software errors and crashes
may be caused by bad memory SIMMs (Figure 1).
There is a memory test that occurs on power-up that reports to DOS how much memory is
actually present in the system. It will not detect memory errors. A typical SmartSeis
TM
will have
4 Mb of memory, and in rare cases, 8 Mb. If the incorrect amount of memory is reported,
there is a problem. We recommend that a factory-trained Geometrics technician conduct any
additional troubleshooting and memory replacement. If you do replace the memory, do not
exceed 8 Mb as address conflicts will occur.
Alternatively, an over-heated system can cause random crashes and errors. Check that the main
system fan is operating properly (Figure 1).
Power supply
If the external power checks out, it may be that there is a problem with the internal power
supply. There are five LEDs located on the power supply board (Figure 1) to monitor the
output voltages. All these lights should be lit with the same brightness if the power supply is
working properly and supplying the system components with a consistent 12 V. Each LED
indicates that a specific power module on the power supply board is working.
Also check the LEDs of the system components to confirm that they are receiving power from
the power supply board. These include the three LEDs on the back of the display assembly
(Figures 5 and 6), two LEDs on each acquisition board and the OMNI board (Figures 2 and
4), and the power cable connectors (Figure 1).
System configuration
The CMOS settings define the system configuration. Common errors messages that indicate
that there are CMOS-related problems are “
Keyboard not found
,” “
CMOS error
” or similar,
and “
BIOS checksum error
.” The errors are usually caused by fluctuation or loss of internal
system power from the backup Lithium battery while the seismograph is off.
The key panel of the SmartSeis does not emulate an actual keyboard, and thus, keyboard
detect is not set up as the CMOS default, causing the “Keyboard not found” error. You may
set CMOS to ignore keyboard errors upon start-up by entering the Setup.
1. Connect an external keyboard to the seismograph. Power-up.
2. During boot-up, look for the message that gives the option to enter the Standard
CMOS Setup by pressing the delete or F2 key (key varies with system).
