68 5000 Series Oscilloscopes Service Guide
4 Troubleshooting
5 Disconnect the power supply cable from the AC input board
and check the voltage between pins 1 and 7 of the connector
coming from the power supply.
6 If it is less than 14 V, the problem is in the cable or the power
supply. Remove the cable and test it for shorts or opens using
the DMM. Replace the defective assembly.
7 If the voltage is 15 V ±10% only when the cable is
disconnected from the AC input board, then test the AC input
board.
Figure 11 Power supply to AC input board connector
Pin 7 (15V)
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