Service
2
Keysight 53210A/53220A/53230A Assembly Level Service Guide
163
below lists the power supply voltages and their tolerances.
4
If the +15 V is bad or missing, replace the AC Power Supply (p/n 0950-2496).
5
If the +3.3 V or +5 V are bad or missing, the GPIB will likely fail.
6
If the +15 V is present, but one or more of the other voltages are incorrect or
missing, replace the motherboard.
7
After verifying the correct voltages, perform the counter Self-Test as described
.
Table 2-6
DC power supply voltages
Test point
Voltage
Tolerance
T1000
+3.30 V
±0.250 V
T1001
+3.30V
±0.250 V
T1002
+5.00 V
______
T1003
+5.00 V
______
T1004
+2.50 V
±0.6 V
T1005
+1.20 V
______
T1006
-5.00 V
±1.2 V
T1007
+10.0 V
--------
J1000 (pins 1,2)
+15.0 V
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