Keysight N9038A - Page 376

376 Keysight N9038A MXE Service Guide
Power Supply & Midplane
A7 Midplane Board Assembly Troubleshooting
Table 12-3 A7 Midplane Board LEDs and Test Points
Supply/
Signal
Description Referenced
To
Generated
On
Expected Status
Power Off
a
Power On
LED Test Point
(VDC)
LED Test Point
(VDC)
+32VA +32 Volt
Analog Supply
ACOM A6 Red 0 Off +32 ± 2.0
+15VA +15 Volt
Analog Supply
ACOM A6 Red 0 Off +15 ± 1.0
+15VSB +15 Volt
Standby Supply
ACOM A6 Green +15 ± 1.0 Green +15 ± 1.0
+9VA +9 Volt
Analog Supply
ACOM A6 Red 0 Off +9 ± 1.0
+5.1VA +5.1 Volt
Analog Supply
ACOM A6 Red 0 Off +5.1 ± 0.75
-7VA -7 Volt
Analog Supply
ACOM A6 Red 0 Off -7 ± 1.0
-15VA -15 Volt
Analog Supply
ACOM A6 Red 0 Off -15 ± 1.0
+12VD +12 Volt
Digital Supply
DCOM A6 Red 0 Off +12 ± 1.0
+5.1VD +5.1 Volt
Digital Supply
DCOM A6 Red 0 Off +5.1 ± 0.75
+5.1VSB +5.1 Volt
Standby Supply
DCOM A6 Green +5.1 ±
0.75
Green +5.1 ± 0.75
+3.35VD +3.35 Volt
Digital Supply
DCOM A6 Red 0 Off +3.35 ±
0.75
FAN_P Fan Positive Voltage ACOM A6 Red 0 Off 9.2 - 14.5
+3.3VA +3.3 Volt
Analog Supply
ACOM A7 Red 0 Off +3.35 ±
0.75
-5.2VA -5.2 Volt
Analog Supply
ACOM A7 Red 0 Off -5.2 ± 0.75
FAULT_L Power Supply Fault ACOM A6 Off TTL High Off TTL High