142 Diagrams
Table 6-3. Test Points (continued)
R659
RMOUT (Sheet 2)
OV in CV mode
- .135V (6651A), - .125V (6652A). - .195V (6653), - .18V
(6654A), - .112V (6655) in CC mode
U605-1
IMON (Sheet 2)
0V in CV mode
U609-1
NEG IMON (Sheet 2)
0V in CV mode
-9.6V in CC mode
U506-1
IMON+ circuit (Sheet 2)
0V in CV mode
-6.8V in CC mode
U608-14
CC* (Sheet 2)
5V in CV mode
0V in CC mode
U606-1
CV control (Sheet 2)
1.15V in CV mode
10V in CC mode
U606-7
VMON (Sheet 2)
10V in CV or CC mode (@ FS voltage out)
U609-7
CV control (Sheet 2)
- 10V in CV or CC mode
U608-15
CV* (Sheet 2)
0V in CV mode
5V in CC mode
U607-3
CV or CC control (Sheet 2)
0.03V (6651-54), 0.06V (6655) in CV mode
0.6V in CC mode
R686
OUTPUT CONTROL (Sheet 2)
0.03V (6651-54), .06V (6655) in CV mode
0.6V in CC mode
U607-7
Gross current limit circuit (Sheet 2)
14V in CV or CC mode
R687
DP CONTROL (Sheet 2)
0.13V (6651-54) 0.24V (6655) in CV mode
2.4V in CC mode
U502-13
BOVPROG (Sheet 2)
0 to 5V PWM pulses
U603-5
OV circuit (Sheet 2)
3.8V (with max OVP programmed)
U603-7
OV circuit (Sheet 2)
3.8V (with max OVP programmed)
U608-8
OV circuit (Sheet 2)
0 2V with full scale voltage programmed (6651-54) 0.6V with
full scale voltage programmed (6655)
U608-2
OV circuit (Sheet 2)
5V (no OV conditions)
U513-11
THERM HS (Sheet 3)
5V (with no load and cold heat sinks)
U513-5
THERM AMB (Sheet 3)
4.5V (with 23°C ambient)
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: ......