Keysight E4980A Service Manual page 59

Troubleshooting
Function Specific Troubleshooting
Bit switches S1 and S2 can be identified by the labels "S1" and "S2" on the
scanner interface board.
Step 4. Replace the scanner interface board.
Step 5. Set DC power supply output voltage +5 V. Connect TP2 (GND) on the bias
interface simulator to '-' terminal of the power supply. Then connect TP1
(Vcc) on the simulator to '+' terminal of the power supply. (Refer to
4-14
Figure 4-14 Scanner Simulator Connections
DC power for the bias interface simulator can be supplied from the
E4980A/ E4980AL instead of an external DC power supply.
Step 6. Connect the scanner simulator to the scanner interface connector on the
E4980A/ E4980AL's rear panel shown in
Step 7. Connect the 1 k standard to the UNKNOWN terminal on the E4980A/
E4980AL's front panel.
Step 8. Turn the E4980A/ E4980AL ON.
Step 9. Press [System].
Step 10. Press the SELF TEST softkey to display the SELF TEST page.
Step 11. Use the CURSOR arrow keys to move the cursor to the TEST MENU field.
Keysight E4980A/E4980AL Precision LCR Meter
.)
20 Hz - 2 MHz
Preset Precision LCR Meter
7 8 9
DC
Trigger 4 5 6
1 2 3
DC Bias .
0
Displ a y Meas Discha rge test devi c e before connecting
Format Setup
42V Peak Max Output
DC
Source
DC Source
(Option 001)
Return
Save/ Local/
Recall A Recall B Sy stem
Recall Lock
Figure 4-14.
Figure
DC
UNKNOWN
CAT I
59