Service manual

PN 4237242C
7.4-4
TROUBLESHOOTING
TROUBLESHOOTING ERROR MESSAGES
RAM Drive Failure
038 During system boot, Virtual RAM (VRAM) drives are created. If the system
was unable to create a drive,
ERROR DETECTED (038) RAM Drive Failure
is
displayed on the screen.
To create a VRAM drive, you must put the proper line in the CONFIG.SYS file.
This means that the drive is created very early in the boot sequence. High
memory, configured as extended memory, is used for the VRAM drive.
Problems could occur with the disk boot process or the BIOS settings
(especially where RAM is concerned) or with the RAM itself. Assuming a good
disk, the BIOS on the MD II is self-configuring, so the most likely problem is
with RAM.
Software Fatal Error
037
ERROR DETECTED (037) Software Fatal Error
is displayed on the screen when
execution of the instrument software has reached an area in the software that
it should never get to. This is in effect, a software safety net.
Software Timer Error
021 At various times during program execution, software timers are allocated to
ensure that events perform as expected. If the system is unable to allocate a
timer,
ERROR DETECTED (021) Software Timer Error
is displayed on the
screen.
SPAD Board Failure
001 Currently this error is not used by the system.
004
ERROR DETECTED (004) SPAD Board Failure,
indicates an overflow of a
channel buffer. The RBC and WBC channeling sections have 16K buffers,
while the Plt uses an 8K buffer. When too many pulses are processed, this
error is displayed on the screen.
039 During an A/D conversion on the SPAD card, a timer checks the time it takes
to complete the conversion. If the conversion does not complete in
approximately 10
µ
s,
ERROR DETECTED (039) SPAD Board Failure
is
generated.
System Disk File Corrupt
005 If the system is unable to load a resource file from a diskette,
ERROR
DETECTED (005) System Disk File Corrupt
is displayed on the screen.
012 When the system powers up, it searches for a good system configuration
either in CMOS or from the PD.DAT file on the Program Disk and then
attempts to make them the same.
ERROR DETECTED (012) System Disk File
Corrupt
is displayed on the screen if both configuration sources are bad or if
the system cannot write a new PD.DAT file to disk. See User Resource Adapter
(URA) Card under Heading 2.4, SYSTEM CONTROL for more information
about how CMOS data is handled on power up.
016
ERROR DETECTED (016) System Disk File Corrupt
is displayed on the screen
when the system cannot load a Printer report template file from the Program
Disk.
019 The system does a CRC check whenever it loads a file from the floppy drive.
ERROR DETECTED (019) System Disk File Corrupt
is generated whenever the
CRC check fails.
Table 7.4-1 Error Messages (Continued)
Error Message Code Description/Possible Fault