16 Verification
Table 2-4. Constant Voltage (CV) Tests
Action
Normal Result
Voltage Programming and Readback Accuracy
This test verifies that the voltage programming, GPIB readback (GPIB system power supplies only), and front panel display
functions are within specifications. With system power supplies, values read back over the GPIB should be the same as
those displayed on the front panel.
1
Turn off the power supply and connect a DVM across +LS and -LS
(see Figure 2-1A).
2
Turn on the power supply with no load and program the output for 0 volts
and maximum programmable current (see Table 2-2).
CV annunciator on. Output current near
0.
3
Record voltage readings at DVM and on front panel display.
Readings within specified Low Voltage
limits.
4
Program voltage to full scale (see Table 2-2).
5
Record voltage readings of DVM and on front panel display.
Readings within specified High Voltage
limits.
CV Load Effect
This test measures the change in output voltage resulting from a change in output current from full-load to no-load.
1
Turn off the power supply and connect a DVM across +LS and -LS
(see Figure 2-1A).
2
Turn on the power supply and program the current to its maximum
programmable value and the voltage to its full-scale value (see Table 2-2).
3
Adjust the load to produce full-scale current (see Table 2-2) as shown on
the front panel display.
CV annunciator is on. If it is not, adjust
the load to slightly reduce the output
current until the annunciator comes on.
4
Record voltage reading of the DVM.
5
Adjust load to draw 0 amperes (open load). Record voltage reading of the
DVM.
6
Check test result.
The difference between the DVM
readings in steps 4 and 5 are within the
specified Load Effect limits.
CV Source Effect
This test measures the change in output voltage resulting from a change in ac line voltage from its minimum to maximum
value within the line voltage specifications.
1
Turn off the power supply and connect the ac power input through a
variable-voltage transformer.
Summary of Contents for 6571A
Page 10: ......
Page 33: ...Troubleshooting 33 Figure 3 1 Overall Troubleshooting Sheet 1 of 4...
Page 34: ...34 Troubleshooting Figure 3 1 Overall Troubleshooting Sheet 2 of 4...
Page 35: ...Troubleshooting 35 Figure 3 1 Overall Troubleshooting Sheet 3 of 4...
Page 36: ...36 Troubleshooting Figure 3 1 Overall Troubleshooting Sheet 4 of 4...
Page 37: ...Troubleshooting 37 Figure 3 2 No Display Troubleshooting...
Page 38: ...38 Troubleshooting Figure 3 3 OV Will Not Fire Troubleshooting...
Page 39: ...Troubleshooting 39 Figure 3 4 OV At Turn On Troubleshooting Sheet 1 of 2...
Page 40: ...40 Troubleshooting Figure 3 4 OV At Turn On Troubleshooting Sheet 2 of 2...
Page 41: ...Troubleshooting 41 Figure 3 5 Output Held Low Troubleshooting Sheet 1 of 2...
Page 42: ...42 Troubleshooting Figure 3 5 Output Held Low Troubleshooting Sheet 2 of 2...
Page 43: ...Troubleshooting 43 Figure 3 6 Output Held High Troubleshooting...
Page 44: ...44 Troubleshooting Figure 3 7 DAC Circuits Troubleshooting...
Page 45: ...Troubleshooting 45 Figure 3 8 DAC Test Waveforms...
Page 46: ...46 Troubleshooting Figure 3 9 CV CC DAC and Amplifier Circuit Troubleshooting...
Page 47: ...Troubleshooting 47 Figure 3 10 Serial Down Troubleshooting Sheet 1 of 2...
Page 48: ...48 Troubleshooting Figure 3 10 Serial Down Troubleshooting Sheet 2 of 2...
Page 49: ...Troubleshooting 49 Figure 3 11 Isolator Board Troubleshooting...
Page 50: ...50 Troubleshooting Figure 3 12 Secondary Interface Down Sheet 1 of 2...
Page 51: ...Troubleshooting 51 Figure 3 12 Secondary Interface Down Sheet 2 of 2...
Page 52: ...52 Troubleshooting Figure 3 13 Slow Downprogramming Troubleshooting...
Page 55: ...Troubleshooting 55 Figure 3 14 A3 FET Board Test Waveforms...
Page 59: ...Troubleshooting 59 Figure 3 17 Signature Analysis Connections for Model 657xA Only...
Page 60: ...60 Troubleshooting Figure 3 17 Signature Analysis Connections for Model 667xA Only...
Page 75: ...Troubleshooting 75 Figure 3 20 Component Locations Top Cover and RFI Shield Removed...
Page 76: ......
Page 83: ...Principles Of Operation 83 Figure 4 1 Agilent Series 665xA 667xA Power Supply Block Diagram...
Page 84: ......
Page 124: ...124 Diagrams Figure 6 1 Test Point Waveforms for Table 6 3...
Page 125: ...Diagrams 125 Figure 6 2 Circuit Board Cabling Diagram...
Page 126: ...126 Diagrams Figure 6 3 A1 Front Panel Board Component Location Diagram...
Page 127: ...Figure 6 4 A1 Front Panel Board Schematic Diagram...
Page 128: ...Figure 6 5 A2 GPIB Board Assembly Diagram 667xA only...
Page 129: ...2 3 4 1 6 5 Figure 6 6 A2 GPIB Board Schematic Diagram 667xA only 7 8...
Page 130: ...Figure 6 7 A3 FET Board Assembly Diagram and Test Point Locations...
Page 135: ...Figure 6 12 A5 Board Sec CV CC Readback DACs Schematic sheet 1 64 37 38 36 39 40...
Page 136: ...Figure 6 12 A5 Board CV CC Control Circuits Schematic sheet 2 40 45 46 39 41 42 47 43 48 44...
Page 138: ...Figure 6 13 A6 Output Filter A7 Snubber Boards Assembly Diagrams 65 6671A 72A...
Page 140: ...Figure 6 15 A6 Output Filter A7 Snubber Boards Assembly Diagrams 65 6673A 74A...
Page 142: ...Figure 6 17 A6 Output Filter A7 Snubber Boards Assembly Diagrams 65 6675A...
Page 143: ...Figure 6 18 A2 Isolator Board Assembly and Schematic Diagram for 654xA 655xA Models Only...
Page 154: ......