Keysight E8257D/67D - Option 008;009 Troubleshooting

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E8257D/67D, E8663D PSG Signal Generators Service Guide

Troubleshooting

Troubleshooting Assembly–Level Problems

1-28

4. Power the instrument up again and check the faulty supply. If it is still bad, power down and re–install the first

assembly removed.

5. Remove the next assembly and see if that fixes the problem. Continue this process until the supply functions

properly.

6. Replace the last assembly that you removed.

Symptom: +1.95 VD, +1.8 VD LEDs not on

These supplies are generated by voltage regulators on the A31 Motherboard.

Troubleshoot by checking the following voltages at the A19 Power Supply:

• +3.4 VD, which is regulated down to +1.95 VD

• +2.6 VD, which is regulated down to +1.8 VD

If the supplies are good at the A19 Power Supply, replace the A31 Motherboard.

Option 008/009 Troubleshooting

Removable flash memory operation requires a license key, a compact flash drive, and a flash memory card. The flash

drive communicates directly to the A18 CPU through a ribbon cable.

NOTE A flash memory card must be installed for the firmware to report Option 008/009 in the instrument.

1. Verify the flash memory card is installed.

2. Power the instrument on.

3. Check to see if Option 008 or 009 is installed in the instrument, press

Utility > Instrument Info > Diagnostic.

4. Verify the green LED to the right of the A41 Compact Flash Door, on the instrument rear panel, turns on and off

during the instrument boot- up.

5. If the green LED light does not turn on and off or Option 008/009 is not listed as an installed option,

a. Replace the flash memory card.

b. Repeat steps 2 thru 4.

6. If the green LED light still does not turn on and off or Option 008/009 is still not listed as an installed option,

a. Replace the A40 Compact Flash Drive.

b. Repeat steps 2 thru 4.

7. If the green LED light still does not turn on and off or Option 008/009 is still not listed as an installed option,

a. Replace the A18 CPU

b. Run the required performance test for the A18 CPU, see Chapter 4, “Post–Repair Procedures.”

c. Repeat steps 2 thru 4.