Keysight Technologies X Series Service Manual page 356

Power Supply/Midplane Troubleshooting
A7 Midplane Assembly Troubleshooting
Voltage readings are referenced to ACOM (TP4). All ohmmeter measurements were taken from
the power supply test point to ACOM. Due to capacitive effects, wait for the ohmmeter readings
to stabilize.
Table 10-2
Power Test
Supply Point
+32A TP3
+15A TP6
+15SB TP2
+12D TP16
+9A TP7
+5.2A TP5
+5.1D TP15
+5.1SB TP17
+3.35D TP13
+3.3A TP10
-5.2A TP11
-7A TP8
-15A TP9
n/a TP1
n/a TP4
n/a TP14
n/a TP12
356
A7 Midplane Board Test Points
Description
32 Volt Analog supply
15 Volt Analog supply
15 Volt Standby supply
12 Volt Digital supply
9 Volt Analog supply
5.2 Volt Analog supply
5.1 Volt Digital supply
5.1 Volt Standby
3.35 Volt Digital supply
3.3 Volt Analog supply
-5.2 Volt Analog supply
-7 Volt Analog supply
-15 Volt Analog supply
Fan Positive supply
Analog Common
Digital Common
Power OK
Expected
Vol tmeter Read ing Ohmmeter Read ing
(VDC)
Power ON
+32 ± 2.0
+15 ± 1.0
+15 ± 1.0
+12 ± 1.0
+9 ± 1.0
+5.2 ± 0.75
+5.1 ± 0.75
+5.1 ± 0.75
+3.35 ± 0.75
+3.3 ± 0.75
-5.2 ± 0.75
-7 ± 1.0
-15 ± 1.0
8.5 to 13.5 VDC
~8.8 VDC @ 25C
n/a
n/a
+3.9 ± 0.75
Keysight N9010A EXA Service Guide
Expected
(KΩ)
Power OFF
1.3 kΩ
260 Ω
264 Ω
264 Ω
120 Ω
3.6 kΩ
40 Ω
228 Ω
47 Ω
36 Ω
1.9 Ω
445 Ω
390 Ω
490 Ω
n/a
n/a
9.2 kΩ