Specifications

Chapter 4: Troubleshooting

Power Supply Troubleshooting

This section provides information to help you isolate the problem to the assembly level

when the power system is not operating properly.

There are two sets of LEDs on the backplane assembly. Seeing which of these LEDs

are illuminated will help you identify the reason and the remedy for the power failure.

WARNING SHOCK HAZARD!

The maintenance described in this section is performed with power supplied to the

oscilloscope and with the protective covers removed. Only trained service personnel

who are aware of the hazards involved should perform the maintenance. Read the safety

notices at the back of this guide before proceeding. Failure to observe safety precautions

may result in electric shock.

To locate both sets of LEDs, remove the oscilloscope top panel to expose the top edges

of the backplane assembly. The first set of LEDs is located in the upper right corner

of the backplane assembly, to the right of the J13001 connector (see Figure 4- 5).

Note: If you cannot see either set of LEDs, you may have a slightly modified backplane

board. Contact your Agilent Service Center for assistance.

Figure 4-5 First set of LEDs

This set of LEDs works in groups. To use them to determine the problem and remedy,

refer to the following table and follow these steps:

1 Connect the power cord. All 16 LEDs should illuminate. If none of them are illuminated,

replace the bulk supply.

2 Turn power on. If all 16 LEDs turn off, the power supplies are working.