Check 11, Dc-Dc Converter Input Voltage - Agilent Technologies 4339B Service Manual

Check 11, DC-DC Converter Input Voltage

1. Turn on the 4339B.
2. Using a multimeter, check if the voltage between TP4 and TP3 (DC-DC Converter input
voltage) on A1 Assembly is between +12 V and +15 Vdc. Refer to Figure 4-12 for the test
pad locations.
3. If the voltage is in the range, proceed to the \Check 12, DC-DC Converter Open Output
Voltages", otherwise proceed to the \Check 13, Transformer Secondary Voltage".
4-16 T roubleshooting
Figure 4-12. Test Pad Locations