Evaluation Board Manual
Preliminary
PPC750FX Evaluation Board
750FXebm_ch12.fm
June 10, 2003
Bills of Materials
Page 103 of 115
The normal procedure to locate a component is to look up the coordinates in the Component Placement table
in the schematic diagram, then use the X and Y scales on the edge of the board to get to the approximate
location of the component on the board. The reference designator that is silk-screened on the board is then
used to locate the component precisely. The location of component BT1, at coordinates 7830 and 4260 in the
example table, is shown in
Note: The appearance of the scales as shown in the example figure is representative only. The actual
appearance will vary from board to board due to constraints imposed by available board space and
component placement. However, the basic format is the same in all cases with a reference mark appearing,
whenever possible, every inch.
Figure 12-2. Board Location Grid—Top View
Figure 12-3. Board Location Grid—Bottom View
0000
0,0 datum
center
of hole
1000
2000
3000
4000
5000
6000
7000
8000
000
0
1000
20
00
3000
Y=2260
X=7
830
X
Y
9000
10000
11000
0000
1000
200
0
3000
0,0 datum
center
of hole
Y=2260
X
=
78
30
X
Y
0
000
1000
200
0
3000
0000
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
11000
0000
1000
200
0
3000
Содержание PPC750FX
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