HP 4395A - Page 211

Table 7-1. A50 Power Supplies
Supply Connector Pin GND Connector Pin Range
+5 VD A50J3 Pin 1, 2, and 3 A50J3 Pin 4, 5, and 6 +4.6 V to +5.7 V
-18 V A50J2 Pin 1 A50J2 Pin 3 and 4 -14.0 V to -27.0 V
+18 V A50J2 Pin 2 A50J2 Pin 3 and 4 14.0 V to 27.0 V
+7.8 V A50J2 Pin 5 A50J2 Pin 3 and 4 7.0 V to 9.0 V
-7.8 V A50J2 Pin 6 A50J2 Pin 3 and 4 -6.0 V to -12.0 V
+24 V A50J2 Pin 8 A50J2 Pin 10 22.0 V to 27.0 V
If any of the power supply voltages are out of the limits, replace the A50 DC-DC
Converter.
If all A50 power supply voltages are good, the A50 pre-regulator is veried.
Power Supply Troubleshooting 7-13