Diagrams 141
Table 6-3. Test Points (continued)
Al MAIN BOARD (FIGURE 6-5, Sheets 1-4)
Connect meter or scope common to test point
when taking measurements at test points
through
.
-C770
Secondary common (Sheet 1)
R605
+ 5V Secondary bias (Sheet 1)
+ 5V
±
0.2V
+C604
+ 15V Secondary bias (Sheet 1)
+ 15V
±
0.6V
Q770 HS
+ 24V (Sheet 1)
+ 21V to + 27V (1V p-p ripple)
R607
- 15V Secondary bias (Sheet 1)
- 15V
±
1V
U602-2
- 25V (Sheet 1)
- 22V to - 28V (300mV p-p ripple)
U603-3
Fan speed control (Sheet 1)
+ 5 V with no load connected and an ambient temperature of
23°C
D606 anode
Fan speed control (Sheet 1)
+ 4 V with no load connected and an ambient temperature of
23°C
U720-6
SPCLR (Sheet 2)
Goes high for approximately 40 ms at power on, and then goes
low
U608-3
Shutdown circuit (Sheet 2)
+ 8.1V
U721-16
Shutdown circuit (Sheet 2)
0.7V
D674 cath
+ 15 V GATED (Sheet 2)
+ 14.5V
D676 anode
- 15 V GATED (Sheet 2)
- 14.5V
U505-6
CV/CC DACs ref (Sheet 3)
+ 10V
±
0.05V
U506-7
Readback DAC ref (Sheet 3)
- 11.58V
±
0.1V
U510-6
CCPROG (Sheet 2,3)
- 8.5V approximately with FS current programmed
U508-6
CVPROG (Sheet 2,3)
- 9.5V approximately with FS voltage programmed
The measurements at test points
through
were taken with full scale voltage and full scale current programmed
The measurements were made first in the CV mode with no load and then in the CC mode with the load set for full scale
output voltage and current. If the CC annunciator is not on, set the current to a slightly lower value until it comes on.
U605-7
CC control (Sheet 2)
2.2V in CV mode - .25V (6651-54), - 33V (6655) in CC mode
Summary of Contents for 6541A
Page 12: ...12 Verification Figure 2 1 Basic Test Setup CV TESTS CV TESTS ...
Page 18: ...18 Verification Figure 2 3 CC RMS Noise Measurement Test Setup ...
Page 30: ......
Page 32: ...32 Troubleshooting Figure 3 1 Top View with Cover Removed for 655xA 665xA Models Sheet 1 of 2 ...
Page 33: ...Troubleshooting 33 Figure 3 1 Top View with Cover Removed for 655xA 665xA Models Sheet 2 of 2 ...
Page 37: ...Troubleshooting 37 Figure 3 2 Overall Troubleshooting Flow Diagram Sheet 1 of 4 ...
Page 38: ...38 Troubleshooting Figure 3 2 Overall Troubleshooting Flow Diagram Sheet 2 of 4 ...
Page 39: ...Troubleshooting 39 Figure 3 2 Overall Troubleshooting Flow Diagram Sheet 3 of 4 ...
Page 40: ...40 Troubleshooting Figure 3 2 Overall Troubleshooting Flow Diagram Sheet 4 of 4 ...
Page 51: ...Troubleshooting 51 Figure 3 5 No Display Troubleshooting ...
Page 52: ...52 Troubleshooting Figure 3 6 OV Will Not Fire Troubleshooting ...
Page 53: ...Troubleshooting 53 Figure 3 7 OV At Turn On Troubleshooting Sheet 1 of 2 ...
Page 54: ...54 Troubleshooting Figure 3 7 OV At Turn On Troubleshooting Sheet 2 of 2 ...
Page 55: ...Troubleshooting 55 Figure 3 8 Output Held Low Troubleshooting Sheet 1 of 2 ...
Page 56: ...56 Troubleshooting Figure 3 8 Output Held Low Troubleshooting Sheet 2 of 2 ...
Page 57: ...Troubleshooting 57 Figure 3 9 Output Held High Troubleshooting ...
Page 58: ...58 Troubleshooting Figure 3 10 DAC Circuits Troubleshooting ...
Page 60: ...60 Troubleshooting Figure 3 13 Serial Down Troubleshooting Sheet 1 of 2 ...
Page 61: ...Troubleshooting 61 Figure 3 13 Serial Down Troubleshooting Sheet 2 of 2 ...
Page 62: ...62 Troubleshooting Figure 3 14 Secondary Down Troubleshooting Sheet 1 of 2 ...
Page 63: ...Troubleshooting 63 Figure 3 14 Secondary Down Troubleshooting Sheet 2 of 2 ...
Page 64: ...64 Troubleshooting Figure 3 15 Slow Down Programming Troubleshooting ...
Page 65: ...Troubleshooting 65 Figure 3 16 Isolator Board Circuits Troubleshooting ...
Page 80: ......
Page 87: ...Principles of Operation 87 Figure 4 4 Output Power and Control Circuits ...
Page 94: ......
Page 136: ......
Page 145: ...Figure 6 1 Power Supply Interconnection Diagram for All Models ...
Page 146: ...Figure 6 2 AC Power Distribution Diagram for 655xA 665xA Models ...
Page 147: ...Figure 6 3 GPIB Board Assembly Diagram sheet 1 of 2 ...
Page 148: ...2 3 4 1 6 5 7 8 Figure 6 3 GPIB Board Schematic Diagram sheet 2 of 2 ...
Page 149: ...Figure 6 4 Front Panel Board Assembly Diagram sheet 1 of 2 ...
Page 150: ...Figure 6 4 Front Panel Board Schematic Diagram sheet 2 of 2 ...
Page 152: ...Figure 6 5 A1 Main Board Assembly Diagram for 654xA 664xA Models Only ...
Page 160: ...Figure 6 6 Left Tunnel Circuits Schematic Diagram for 654xA 664xA Models Only sheet 2 ...
Page 162: ...Figure 6 7 Right Tunnel Circuits Schematic Diagram for 654xA 664xA Models Only sheet 2 ...
Page 164: ......
Page 168: ......