Agilent Technologies 11713B, Operating And Service Manual, Page: 111 / 114

Servicing the Attenuator/Switch Driver
9
11713B/C Operating and Service Manual 111
Rear Panel Troubleshooting
Condition Test
VDC COM does
not output
voltage
corresponding
to setting
*
* For 11713B, supply voltage is fixed at +24 Vdc
1 Determine if voltage output to rear panel is correct. Measure voltage
at TP3 (supply voltage of +5 V), TP4 (supply voltage of +15 V) or TP5
(supply voltage of +24 V) on motherboard
•
If TP3 = +5 ± 5% Vdc, TP4 = +15 ± 12% Vdc and TP5 = +24 ± 8%
Vdc, go to step 2.
•
Else, change motherboard.
2 Determine if there is discontinuity from motherboard to rear panel
board.
Figure 15 Motherboard with Marked Location of Figure 17 and Figure 18
Figure 17
Figure 18