HP 3000 Series Installation And Service Manual page 50

Ma
intenance
Table 5-2. Identifying Defective RAM Data Chips
LED Display
7 6 5 4
Bit No.
De fecti ve RAM Chip
0 0 0 0
0 U47
0 0 0 1 1
U57
0 0 1 0
2
U67
0 0 1 1
3
U77
0 1 0 0 4
U87
0 1 0 1
5 U97
0 1 1 0
6 UI07
0 1 1 1
7 Ul17
1 0 0 0
8 U48
1 0 0 1
9
U58
1 0 1 0
10 U68
1 0 1 1 11 U78
1 1 0 0 12 U88
1 1 0 1 13 U98
1 1 1 0 14 UI08
1 1 1 1 15 Ul18
Legend:
1
=
LED lighted
0
=
LED off
5-9