Agilent Technologies 54502A Manuale di Servizio Scaricare il pdf (Pagina 101)

Power Supply

Voltages Check

The power supply must be loaded by either the System Assembly Board or with an

added resistor to check the voltages.

Warning This procedure is to be performed only by service-trained personnel

aware of the hazards involved (such as fire and electrical shock).

Power Supply Loaded by System Assembly

1. Remove instrument top cover.

2. Using the figure below, check for the voltages indicated at the testpoints.

Power Supply Isolated

Isolate and check the supply with the following steps. Use the figure above for

reference.

1. Remove instrument power cable.

2. Disconnect supply output cable at supply (see figure above).

3. Load + 5.20 V supply with a 2 ohm 25 watt resistor. Use jumper wires to

connect one end of the resistor to any of pins 1-4, and the other end to any of

pins 5-8.

Figure 6-11. Power Supply Test Points

Service HP 1650B/1651B

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Agilent Technologies 54502A Manuale di Servizio Pagina 101