Keysight E8257D/67D - Self-Tests 11 Xx: A18 CPU Self-Test Errors

E8257D/67D, E8663D PSG Signal Generators Service Guide
Troubleshooting
Troubleshooting Assembly–Level Problems
1-45
b. If the power supply voltages are good, replace the 10 MHz reference.
c. If the power supply voltages are bad, replace the rear panel interface board.
4. If the 10 MHz signal is present out of the reference oscillator, but not on the A31 mother board at P41–2,
reconnect the cable going to the 10 MHz signal.
a. Measure the end of the cable going to the A31 mother board at J1041.
b. If the signal is bad, replace the cable.
c. If the signal is good, go to Step 5.
5. Measure the ohmic resistance between the J1041 center pin and P41–2 and the J1041 center pin to ground.
a. If the trace is open or shorted to ground, replace the A31 mother board.
b. If the J1041 is not shorted to ground and the J1041 to P41–2 is not open, remove the A7 board and measure
P41–2.
c. If the signal is now present, replace the A7 board.
d. If the signal is still missing, replace the A31 mother board.
1002 1 GHz Test
• Replace the A7 Reference.
Self–Tests 11xx: A18 CPU Self–Test Errors