Keysight Technologies E8257D User Manual

E8257D/67D, E8663D PSG Signal Generators Service Guide 49
Troubleshooting
Troubleshooting Assembly–Level Problems
If a supply LED is not lit, or a measured voltage is less than the acceptable
value, an assembly may be loading down that supply. Using the appropriate
Power Supply vs. Assembly Matrix, determine where each supply is used, then
use the following steps to isolate the defective assembly.
1. Turn off the instrument and remove one of the assemblies biased by the
faulty supply.
2. Turn the instrument on and check the faulty supply. If the supply LED
lights, replace the assembly removed in Step 1. If not, continue with Step
3.
3. Turn the instrument off and reinstall the assembly removed in Step 1.
Remove the next assembly and see if the supply LED lights. Continue this
process until the supply functions properly.
4. Replace the last assembly that you removed.
+5.2 5.2 ± 0.15 10
Supply
Voltage
Acceptable
Voltage
(Vdc)
Maximum
Ripple
(mVpp)
Supply
Voltage
Acceptable
Voltage
(Vdc)
Maximum
Ripple
(mVpp)
Supply
Voltage
Acceptable
Voltage
(Vdc)
Maximum
Ripple
(mVpp)
Supply
Voltage
Acceptable
Voltage
(Vdc)
Maximum
Ripple
(mVpp)
+32 32 ± 0.96 10 +1.95 VD_1 1.95 ± 0.06 10
+15 15 ± 0.45 10 +1.95 VD_2 1.95 ± 0.06 10
+15
Standby
15 ± 0.45 20 +1.8 VD_1 1.8 ± 0.05 10
+10 10 ± 0.3 10 +1.8 VD_2 1.8 ± 0.05 10
+9 9 ± 0.18 10 –5.2 –5.2 ± 0.1 10
+8 8 ± 0.5 10 –5.2 V2 –5.2 ± 0.16 10
+5.2 5.2 ± 0.16 10 –6.0 –6 ± 0.12 10
+5.2 D 5.2 ± 0.16 20 –7.0 –7.0 ± 0.21 10
+3.4 3.4 ± 0.1 10 –15 –15 ± 0.45 10
+2.6 D 2.6 ± 0.08 10
Remove a minimum number of assemblies at one time. If the power supply does
not have a minimum load on it, the supply voltage increases to an overvoltage
condition.

Keysight Technologies E8257D Specifications

General

Brand	Keysight Technologies
Model	E8257D
Category	Portable Generator
Language	English