Agilent Technologies E4438C Guida di Installazione Pagina 194
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Assembly Replacement
A9 Digital Demodulator (Option 501, 502, 503, 504 with Option 300)
2-24
A9 Digital Demodulator (Option 501, 502, 503, 504 with Option 300)
Tools Required
• needle-nose pliers
Removal Procedure
Refer to Figure 2-12 for this procedure and to the connector/cable diagram located on the card cage.
1. Disconnect the power cord.
2. Remove the outer cover. Refer to “Outer and Inner Instrument Covers” on page 2-4.
3. Using needle-nose pliers, disconnect the following cables:
• W13 cable from A9J4
• W14 cable from A9J5
• W12 cable from A7J800.
(This is W78 on an Option 1EM.)
4. Disconnect W10 from A7J13 and A9J3.
5. Locate Top-SLOT 2, lift the retention levers, and disconnect the A9 Digital Demodulator
(Option 501, 502, 503, 504 with Option 300) from the A23 Motherboard.
6. Lift out the A9 Digital Demodulator (Option 501, 502, 503, 504 with Option 300).
Replacement Procedure
1. Reverse the order of the removal procedure.
2. Perform the post-repair adjustments and performance tests that pertain to this removal procedure.
- Service Guide 1
- Contents 10
- 1 Troubleshooting 13
- Before Troubleshooting 14
- Troubleshooting Aids 15
- Table 1-2 16
- ILT-2 A12 CPU Power-On Test 17
- Table 1-3 18
- Table 1-4 23
- Table 1-5 23
- Table 1-6 24
- Table 1-7 24
- Table 1-8 26
- Overview 31
- To Run Self-Test 32
- Power Supplies 35
- Table 1-12 36
- Table 1-13 37
- Table 1-14 38
- Table 1-15 39
- Table 1-16 40
- Table 1-17 42
- AC and Switch 43
- Table 1-18 44
- Table 1-19 47
- Table 1-20 51
- Table 1-21 54
- Table 1-22 57
- Table 1-23 59
- Table 1-24 60
- Table 1-25 62
- Table 1-26 64
- Table 1-27 66
- Self-Tests 15xx 68
- Table 1-29 70
- Table 1-30 74
- Table 1-31 78
- Troubleshooting Unlocks 80
- 512 Reference Unlocked 81
- 513 1 GHz Out of Lock 81
- 516 Baseband Generator Unlock 83
- 623 Demod Unlock 84
- Table 1-33 86
- Table 1-34 87
- Troubleshooting the 91
- Calibration • A18 Reference 97
- Troubleshooting 103
- Relative to CW • Perform: 106
- Peak Search and Marker Delta 113
- Table 1-41 116
- Table 1-42 118
- Pulse menu 119
- No Pulse Signal from LF Out 124
- Review the Warranty 125
- Table 1-43 Contacting Agilent 126
- Asia Call Center Numbers 126
- Alternate Amplitude 135
- Analog Modulation 137
- Reference / Synthesis Loop 159
- A17 Synthesizer 160
- A23 Motherboard 160
- A13 Output 161
- 4 GHz Modulator - IQ 163
- To A13 Output 163
- 4 GHz Mod Offset Sense - IQ 163
- From A13 Output 163
- Option 506 Only 164
- A16 Frac-N 165
- A22 Coupler (Option 506) 166
- 2 Assembly Replacement 171
- After Replacing an Assembly 172
- Tools Required 174
- Removal Procedures 174
- Replacement Procedure 174
- Assembly Replacement 175
- Front Panel 176
- A1 Keyboard 178
- Figure 2-4 A1 Keyboard 179
- A2 Display 180
- Figure 2-5 A2 Display 181
- A2DS1 Display Backlight 182
- Figure 2-6 A2DS1 Backlight 183
- A3 Front Panel Auxilary Board 184
- A4 Inverter 186
- Figure 2-8 A4 Inverter 187
- Removal Procedure 188
- A6 Power Supply 190
- Figure 2-10 A6 Power Supply 191
- A10 I/Q Multiplexer 196
- Figure 2-16 A13 Output 203
- A18 Reference 212
- Figure 2-21 A18 Reference 213
- A19 Daughterboard 214
- Figure 2-26 A23 Motherboard 224
- A23BT1 Battery 225
- A24 Line Module 226
- Rear Panel 227
- Figure 2-29 Rear Panel 228
- A25 Rear Panel Board 229
- Option UNJ) 233
- B1 Power Supply Fan 241
- B2 Small Fan 243
- Figure 2-38 B2 Small Fan 244
- RF Output Connector 247
- 3 Replaceable Parts 251
- Ordering Information 252
- Replaceable Parts 253
- Assemblies from a Top View 258
- Assemblies of the Front Panel 264
- Table 3-2 265
- Table 3-4 269
- Table 3-5 271
- Table 3-6 274
- Table 3-7 276
- Table 3-8 278
- Table 3-9 280
- Table 3-10 282
- Table 3-11 285
- Option UNJ - Overall Cables 287
- Table 3-12 288
- Table 3-13 290
- Option UNJ - Standard Cables 292
- Table 3-15 294
- Table 3-16 296
- Table 3-17 299
- Table 3-18 302
- Option 506 - Overall Cables 305
- Table 3-19 306
- Table 3-20 308
- Option 506 - Standard Cables 310
- Table 3-21 311
- Table 3-22 313
- Table 3-23 315
- Table 3-24 317
- Table 3-25 320
- Hardware of the Front Panel 323
- Table 3-27 325
- Hardware of the Rear-Panel 327
- Table 3-29 329
- (Option 1EM) 330
- Hardware of a Disassembled 331
- Table 3-33 335
- Table 3-34 336
- Table 3-35 337
- Table 3-36 339
- Miscellaneous 340
- 4 Post-Repair Procedures 343
- Post-Repair Procedures Matrix 344
- Post-Repair Procedures 345
- 5 Safety and Regulatory 353
- Safety Notes 354
- General Safety Considerations 355
- Lithium Battery Disposal 356
- Warranty 357
- Assistance 358
- Certification 360
- Index I-1 361
- I-2 Index 362
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