Agilent Technologies 4294A Service Manual Page 100
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- Table of contents
- TROUBLESHOOTING
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92 3
Adjustment
HPOT-Amplifier Offset Correction Constants
H
POT
-Amplifier Offset Correction Constants
The purpose of this procedure is to adjust the H
POT
-amplifier offset.
Required Equipment
Description Recommended Model
4TP OPEN termination 42090A
Procedure
1. Run the adjustment program.
2. Choose the Adj_HpAmp_Ofst.
3. Connect the OPEN termination as shown in Figure 3-6
Figure 3-5 Relative Impedance Correction Constants Setup
4. Follow the adjustment program instruction to update the correction constants.
- Manual Change 1
- Change 2 2
- OSC Level Accuracy Test 2
- Service Manual 9
- Manual Printing History 10
- Safety Summary 11
- Safety Symbol 12
- Certification 12
- Warranty 13
- Limitation of Warranty 13
- Exclusive Remedies 13
- Assistance 13
- Typeface Conventions 14
- Contents 15
- 1 General Information 21
- [System] 22
- Require Equipment 24
- *3.furnished with the 4294A 25
- General Information 26
- 2 Performance Test 27
- Performance Test 28
- Frequency Accuracy Test 29
- Specification 29
- Test Equipment 29
- [Center] - [1] - [M/μ] 34
- [Center] - [1] - [M/m] 37
- DC Bias Monitor Accuracy Test 39
- DC Bias Level Accuracy Test 43
- Measurement Accuracy Test 46
- Capacitor) Setting 50
- Resister) Setting 51
- Standard Capacitor) Setting 57
- Standard Resistor) Setting 57
- [Cal] - FIXTURE COMPEN - OPEN 58
- Calculation Sheet 60
- Performance Test Record 76
- 3 Adjustment 89
- Safety Considerations 90
- Required Controller 90
- Warm-up for Adjustment 90
- Order of Adjustment 91
- Equipment Setup 92
- Required Equipment 100
- Procedure 100
- Adjustment 110
- 4 Troubleshooting 113
- TROUBLESHOOTING SUMMARY 114
- 4. Troubleshooting 115
- Troubleshooting 115
- START HERE 116
- INSPECT THE POWER ON SEQUENCE 117
- Check the GPIB Interface 118
- Check the Parallel Interface 118
- Check the Power-On Selftest 119
- Execute All Internal Tests 119
- Execute the Individual Test 119
- Null Detector Offset CC 123
- 5. Power Supply 125
- INTRODUCTION 126
- 3.Check the A50 Five LEDs 129
- 4. Check the A1 +5 VD LED 129
- 5. Check the A9 Two LEDs 130
- Power Supply Troubleshooting 132
- 3. Check the A50 SHUTDOWN LED 134
- 2. Remove A50 135
- 3. Remove Assemblies 135
- STEADILY 136
- CONVERTER 139
- Table 5-1 A50 Power Supplies 140
- 6. Digital Control 141
- A1 CPU Replacement 144
- FIRMWARE INSTALLATION 145
- 2. Check the A1 CPU 149
- 6. Check the A53 FDD 151
- 8. Check the 24 BIT I/O PORT 151
- 9. Check the LAN Operation 152
- 7 Service Related Menus 155
- DIAGNOSTIC TEST Menu 156
- Test Descriptions 157
- Service Related Menus 162
- 8 Theory of Operation 163
- OVERALL OPERATION 164
- POWER SUPPLY OPERATION 166
- Line Power Module 167
- A40 Preregulator 168
- A50 DC-DC Converter 168
- A50 Shutdown LED 168
- A9 Floating Power Supply 168
- DIGITAL CONTROL OPERATION 169
- Theory of Operation 170
- A30 Front Keyboard 171
- A32 I-BASIC Interface 171
- A34 I/O Connector 171
- A54 Inverter 172
- SOURCE THEORY 173
- A2 Hc Amp 174
- TRANSDUCER THEORY 175
- A3 Hp Amp 176
- A4 Lc Amp 176
- A5 IV Converter & Lp Amp 176
- A6 Vector Generator 176
- VECTOR RATIO DETECTOR THEORY 177
- 9 Parts Replacement 180
- Replaceable Part List 181
- Parts List 182
- Parts Replacement 183
- Table 9-4 Top View (Shield) 188
- 4TP Assembly 189
- Table 9-8 Front Assembly 1 193
- Table 9-9 Front Assembly 2 194
- Table 9-10 Front Assembly 3 195
- Table 9-12 Front Assembly 5 197
- Table 9-13 Front Assembly 6 198
- Table 9-14 Front Assembly 7 199
- Table 9-15 Front Assembly 8 200
- Table 9-16 Front Assembly 9 201
- Table 9-17 Front Assembly 10 202
- Table 9-18 Rear Assembly 1 203
- Table 9-19 Rear Assembly 2 204
- Figure 9-21 Rear Assembly 3 205
- Table 9-20 Rear Assembly 3 206
- Table 9-21 Rear Assembly 4 207
- Table 9-22 Rear Assembly 5 208
- Table 9-23 Side View 209
- Table 9-24 Chassis Assembly 210
- Table 9-25 Other Parts 211
- Replacement Procedure 212
- Front Panel Removal 213
- Rear Panel Removal 213
- A1 CPU Board Replacement 214
- A2/A8/A50/A51 Replacement 214
- A3 Hp Amplifier Replacement 214
- A4 Lc Amplifier Replacement 215
- A7 Synthesizer Replacement 216
- A53 FDD Removal 217
- A52 LCD Removal 218
- A40 Preregulator Replacement 218
- Power Switch Replacement 219
- 10 Post Repair Procedures 222
- POST REPAIR PROCEDURES 223
- 216 10 225
- Post Repair Procedures 225
- A Manual Changes 226
- Manual Changes 227
- B Power Requirement 228
- Replacing Fuse 229
- Power Requirements 230
- 222 Appendix B 231
- Power Requirement 231
- C Error messages 232
- Order of Alphabet 233
- 240 Appendix C 249
- Error messages 249
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