Appendix C: Diagnostic Routines and Messages
C-2 370B User Manual
Boot ROM Check. After confirming that the boot ROMs are without fault, the
370B diagnoses the boot ROMs by checksum. If a system ROM fatal error is
found, ( such as misinsertion) the memory index display alternately blinks 0
and 1.
If a checksum error is found, the appropriate error message is displayed in the
CRT error message area. The message format follows:
ROM 000X
The 370B does not advance to the next routine.
System RAM Check. The 370B checks the system RAM by read/write operation.
When a system RAM fatal error is found (such as bus shorted), the memory
index display alternately blinks 0 and 2, and the 370B does not advance to the
next routine.
Display RAM Check. The 370B checks the Display RAM by read/write operation.
When a read/write error is found (such as bus shorted), the memory index
display alternately blinks 0 and 3, and the 370B does not advance to the next
routine.
Acquisition RAM Check. The 370B checks the Acquisition RAM by a read/ write
operation. When a read/write error is found (such as bus shorted), the memory
index display alternately blinks 0 and 4, and the 370B does not advance to the
next routine.
Table C–1 shows the Power on System Error Messages displayed on the memory
index display.
Table C-1: PowerĆon System Error Messages
Display Description
0/1 (blink) System ROM error (e.g., misinsertion)
0/2 (blink) System RAMS error (e.g., bus shorted)
0/3 (blink) Display RAM Read/Write error (e.g., bus shorted)
0/4 (blink) Acquisition RAM Read/Write error (e.g., bus shorted)
0/5 (blink) Flash ROM checkSum error (e.g., bus shorted)
0/99 (blink) Lithium battery is low (warning)
Lithium Battery Check (warning). In case of the lithium battery becomes low, the
memory index LED blinks with 0 and 99, the 370B displays it and advances the
diagnostic routines.
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