HP 16500B manual To check the power supply voltages, Power Supply Voltages

W A R N I N G

Troubleshooting

To check the power supply voltages

To check the power supply voltages

Refer to chapter 6, "Replacing Assemblies," for instructions to remove or replace covers and assemblies.

Hazard voltages exist on the power supply, the CRT, and the CRT driver board. This procedure is to be performed by service-trained personnel aware of the hazards involved, such as fire and electrical shock.

1Turn off the instrument, disconnect the power cord, then remove the top cover.

2Apply power to the instrument.

3Using a DVM, measure the power supply voltages.

4Note problems with the power supply, then return to the power supply flowchart.

Power Supply Voltages

Pin	Supply/Signal	Voltage
1-5	5 volt	+5 V
6	+5 volt remote sense	+5 V
7-9	+3.5 volt	+3.5 V
10	+3.5 volt remote sense	+3.5 V
11	+12 volt	+12 V
12	−12 volt	−12 V
13	Not connected
14-20	Ground	0 V

Pin	Supply/Signal	Voltage
21	Ground sense	0 V
22	Power valid	+5 V
23	−3.25 volt remote sense	−3.25 V
24-30	−3.25 volt	−3.25 V
31	−5.2 volt current limit	+2.5 V
32	−5.2 volt remote sense	−5.2 V
33-37	−5.2 volt	−5.2 V
38	Remote on/off	+12 V

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