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6 .
With the VOM , verify the presence of the vo ltages within
in the chart below .
7 .
Set the power switch to "OFF . "
8 .
Reseat the DC connectors (P4 and PS ) .
Note :
I f vo ltages are not verified , continue with the procedure .
9 .
Loosen the AC connector ( P l ) on the power supp ly.
10 .
Set the power switch to "ON . "
1 1 .
With the VOM, verify the presence o f AC vo ltages at ( P l ) connector .
Set the meter to record AC voltage and measure from AC l ine to AC
neutral 1 1 5 - 1 2 0 vac.
1 2 .
Set the power switch to "OFF . "
13 .
Reseat the AC connector (Pl ) .
14 .
I f vo ltages in Step 1 1 are verif ied , replace the power supply .
assemble the IBM 900 1 .
Optional Diagnostic , Voltage , and Resistance Checks 3 - 6
0
0
0
JS
DC OUTPU TS
COM RET. - 1
- 3
+12V,5A - 2
!
5
1
V
1A
-
.
15V. RET. - 4
KEV - 5
.
+15V. 1 A - 6
PWR F A I L - 7
-12V, 1A - 8
, .... , {
KEV - 6
See power supply connector diagram on page 3 - 2 .
±2% shown
See Figure 5 - 9 .
Re
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