Agilent Technologies 8590L Service Manual page 632

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