Chapter 14 633
Analyzer Messages
Interpreting Analyzer Messages
Table 14-3 Four-Digit Failure Code Interpretation
Digits From
Example
Equivalent
Binary Value
A16
LEDs
A16 Circuit Tested A16 Reference
Designator
D → 8 16 Video RAM * U305, U306
→ 4 15 I/O Bus Address * U18
2 14 CPU U12
→ 1 13 68230 U57
F → 8
12
†
I/O Bus (Odd byte) U2
→ 4 11 I/O Bus (Even byte) U3
→ 2 10 User RAM U5
→ 1 9 User RAM U22
8 8 User RAM U5
4 → 4 7 User RAM U22
6 NOT USED
5 NOT USED
8 4 ROM (Odd B LSB) U6
4 3 ROM (Even B LSB) U23
2 2 ROM (Odd A LSB) U7
0 1 1 ROM (Even A LSB) U24
*
Refer to the 10-digit failure code description for more information.
†
LED DS12 remains on after pressing PRESET.
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