HP 181A Manual do Utilizador Página 154
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Chapter 3 Replacing Assemblies
To Remove the Front Bezel
3-6 Assembly-Level Service Guide
3
To Remove the Front Bezel
1 Remove the cover.
See the section titled “To Remove the Cover” in this chapter.
2 Remove the bail handle (MP7) by rotating it to the vertical
position and pull the ends outward as shown in Figure 3-3.
Figure 3-3. Handle Removal
3 Remove the front rubber bumper (part of MP2), stretch a corner
and then slide it off as shown in Figure 3-4.
Figure 3-4. Front Rubber Bumper Removal
4 Disconnect the front bezel flat-ribbon cable (which is actually
A2 Display Board’s cable) from J6 of A1 Motherboard Assembly as
shown in Figure 3-5.
- HP 53131A/132A/181A 1
- 225 MHz Counter 1
- Assembly-Level Service 3
- THUS, NEVER TRY 4
- TO MEASURE AC POWER 4
- LINE SIGNALS WITHOUT AN 4
- ISOLATION TRANSFORMER 4
- 2 Service 9
- Contents 10
- 3 Replacing Assemblies 11
- 4 Retrofitting Options 12
- 5 Replaceable Parts 12
- 6 Backdating 13
- 8 HP 53181A Specifications 13
- How to Use This Guide 15
- How to Order Guides 17
- Hardware 20
- Accessories Supplied 21
- Accessories Available 21
- Performance Tests 23
- Complete Performance Tests 25
- Optional HP-IB Verification 25
- Recommended Calibration Cycle 25
- Test Record 25
- Equipment Required 26
- Verification 27
- HP 3458A 30
- Digital Multimeter 30
- Counter Setup 32
- HP 8663A 33
- Synthesized Signal Generator 33
- External Timebase Tests 34
- HP 3325B 35
- Synthesizer #1 35
- Synthesizer #2 35
- HP53131A/132 40
- Synthesizer 42
- FREQUENCY 2 46
- Frequency 1 47
- Frequency 2 48
- (HP 53131A/132A Only) 49
- Option 030 only 53
- (Option 050 only) 55
- (Option 124 only) 56
- Volt Peak 2 61
- (Optional) 62
- (Page 1 of 6) 63
- (Page 2 of 6) 64
- (Page 3 of 6) 65
- (Page 4 of 6) 66
- (Page 5 of 6) 67
- (Page 6 of 6) 68
- (HP 53181A Only) 73
- Frequency Sensitivity 80
- 030/050/124 87
- (Page 1 of 4) 93
- (Page 2 of 4) 94
- (Page 3 of 4) 95
- (Page 4 of 4) 96
- To Provide Repair Information 99
- Scale & 102
- On / Stby 102
- key, then press POWER 104
- To Unsecure for Calibration 105
- To Secure Against Calibration 109
- To View the Calibration Count 110
- Channels 1 and 2 111
- key, then press POWER key 111
- CALIBRATING 113
- OFFS 1 PASS 113
- CAL: OFFS 2 ? 113
- OFFS 2 PASS 113
- DC Power Supply 114
- HP 53131A/132A 114
- Counter Digital Multimeter 114
- To Calibrate Time Interval 115
- HP53131A/132A 116
- HP 8130A 116
- Pulse Generator 116
- CAL: TI FINE? Calibration 117
- Equipment 117
- CAL: TI FINE? 118
- TI CAL PASS 118
- House Standard 119
- 10 MHz Reference 119
- (Medium, High, or Ultra-High) 120
- Chapter 2 Service 123
- Channel 1 127
- CAL: GAIN 1 ? 129
- GAIN 1 PASS 129
- HP 53181A 130
- Safety Considerations 132
- Recommended Test Equipment 133
- Repair Considerations 134
- After Service Considerations 135
- Troubleshooting the Counter 141
- Motherboard 142
- Assembly 142
- TEST LOOP: ON 143
- Self Tests 145
- Replacing Assemblies 149
- Introduction 150
- Tools Required 151
- Do This First 151
- To Remove the Cover 152
- SERIAL PLATE 153
- To Remove the Front Bezel 154
- Rubber foot 164
- A4 AC Power 164
- Supply Assembly 164
- (Option 002) 165
- FOR LABORATORY USE BY 168
- QUALIFIED PERSONNEL 168
- FOUR USAGE EN LABORATOIRE 168
- PAR PERSONNEL QUALIFIE 168
- Talk Only 168
- Retrofitting Options 173
- Retrofitting Procedure 177
- Cable wires 182
- Procedure 184
- A6 High Stability 185
- Timebase Assembly 185
- Plug (MP9) 187
- Replaceable Parts 191
- Exchange Assemblies 192
- Reference Designations 193
- How To Order A Part 194
- Contacting Hewlett-Packard 195
- Cabinet Parts and Hardware 196
- Chapter 5 Replaceable Parts 197
- Assemblies) 199
- Backdating 201
- Manual Changes 202
- Older Instruments 202
- Backdating Hardware 203
- CHANGE 3 (New TCXO boards) 204
- Option 002 206
- Option 015 206
- Option 030 206
- Option 050 206
- Backdating Firmware 208
- (Continued) 209
- HP53131A 213
- (Medium or High) 215
- Backdating Specifications 216
- Chapter 6 Backdating 218
- HP 53131A/132A Specifications 219
- Instrument Inputs 220
- Instrument Inputs (Continued) 221
- Time Base 222
- Measurement Specifications 223
- Automatic or External Arming: 224
- Time or Digit Arming: 224
- Time Interval 227
- Frequency Ratio: 227
- Pulse Width 228
- Rise/Fall Time 228
- Duty Cycle 229
- Totalize 229
- Peak Volts 229
- Trigger Level Timing Errors 230
- Gate Time 232
- Measurement Throughput 232
- Measurement Arming 232
- Measurement Statistics 233
- Measurement Limits 233
- General Information 234
- HP 53181A Specifications 235
- Input Frequency (Hz) 240
- Frequency Error (Hz) 240
- Input Frequency 240
- Measurement Definitions 243
- NUMERICS 247
- 1-800-800-5281 251
- 254
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