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Maintenance
Maintenance
6-8
If the voltage at test point 90 is less than +7.2 V, the
problem is the battery, not the power supply. If the
voltage is +7.2 V or greater, proceed to Step 8.
ăStep 8:ăHold the connection to test point 32
(ground) and check for a voltage of +5.75 V
± 0.05 V at test point 30.
ăStep 9:ăWhile still connected to test point 32
(ground), check test point 31 for a voltage of
+5.000 V ± 0.025 V.
If the voltages at test points 30 and 31 are correct,
the problem is not the power supply. If these voltages
are not correct, the A1 board must be replaced.
Test Point 30
(+5.75 V ± 0.05 V
)
Test Point 31
(+5.000 V ± 0.025 V)
Test Point 32
(Ground)
Test Point 90
(+7.2 V or Higher)
Figure 6Ć1:ăTest Point Locations on the A1 Board
Maintenance
Maintenance
6-8
If the voltage at test point 90 is less than +7.2 V, the
problem is the battery, not the power supply. If the
voltage is +7.2 V or greater, proceed to Step 8.
ăStep 8:ăHold the connection to test point 32
(ground) and check for a voltage of +5.75 V
± 0.05 V at test point 30.
ăStep 9:ăWhile still connected to test point 32
(ground), check test point 31 for a voltage of
+5.000 V ± 0.025 V.
If the voltages at test points 30 and 31 are correct,
the problem is not the power supply. If these voltages
are not correct, the A1 board must be replaced.
Test Point 30
(+5.75 V ± 0.05 V
)
Test Point 31
(+5.000 V ± 0.025 V)
Test Point 32
(Ground)
Test Point 90
(+7.2 V or Higher)
Figure 6Ć1:ăTest Point Locations on the A1 Board