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96
Replacing Assemblies
Use the procedures in this chapter when removing and replacing assemblies and parts
in the Agilent Technologies 8000 Series oscilloscope.
In general, the procedures that follow are placed in the order to be used to remove a
particular assembly. The procedures listed first are for assemblies that must be removed
first.
The graphics in this chapter are representative of the oscilloscope at the time of this
printing. Your unit may look different.
ESD Precautions
When using any of the procedures in this chapter, you must use proper ESD precautions
to protect the oscilloscope components from ESD damage. Failure to follow proper ESD
control procedures may cause immediate failure or latent damage. Latent damage may
result in equipment failure after a period of time. As a minimum, you should place the
oscilloscope on a properly grounded ESD mat and wear a properly grounded ESD wrist
strap when working on the oscilloscope.
CAUTION AVOID DAMAGE TO THE OSCILLOSCOPE!
Failure to implement proper antistatic measures may result in damage to the oscilloscope.
Tools Required
The following tools are required for these procedures.
• Torx drivers: T6, T8, T10, T15, T20
• Socket wrench: 5/8 inch
• Medium size (3/16-in) flat-blade screwdriver
• Nut Drivers: 3/16-in, 9/32-in, 5/16-in, 5/8-in
• Torque driver, 0.34 Nm (3 in-lb), 5 mm or 3/16-in hex drive
• Torque driver, 0.34 Nm (3 in-lb), Torx T6 drive
CAUTION REMOVE POWER BEFORE REMOVING OR REPLACING ASSEMBLIES!
Do not remove or replace any circuit board assemblies in this oscilloscope while power is applied.
The assemblies contain components which may be damaged if the assembly is removed or
replaced while power is connected to the oscilloscope.
WARNING SHOCK HAZARD!
To avoid electrical shock, adhere closely to the following procedures. Also, after disconnecting
the power cable, wait at least three minutes for the capacitors on the power supply to discharge
before servicing this oscilloscope. Hazardous voltages exist on the inverter for the display monitor
while power is applied.
- Service Guide 1
- In This Book 5
- Contents 7
- 6 Replacing Assemblies 8
- 7 Replaceable Parts 8
- 8 Theory of Operation 8
- General Information 10
- Accessories supplied 13
- Accessories available 14
- Options available 15
- ± 5°C from the temperature 16
- Environmental Conditions 17
- Measurement Category 17
- Oscilloscope Dimensions 18
- Preparing for Use 19
- Setting Up the Oscilloscope 20
- To inspect package contents 21
- Figure 2-1 21
- To connect power 22
- Attaching the Probe Connector 25
- Probing the Circuit 26
- To connect the digital probe 28
- Digital probe lead set 29
- 40-pin Connector Pinout 30
- Figure 2-14 31
- To turn on the oscilloscope 32
- To turn off the oscilloscope 32
- Probe Compensation 33
- To clean the oscilloscope 35
- Testing Performance 37
- Clear Display 39
- Averaging 39
- Specifications 39
- Performance Test Procedures 39
- Fluke MET/CAL Procedures 39
- To test the DC calibrator 40
- To test input resistance 42
- Connect the equipment 43
- Select Close 45
- (Supply) Minimum Maximum 45
- Set the scale from the 46
- Set the offset from the 46
- To test bandwidth 47
- To verify threshold accuracy 49
- Connections 50
- High-to-Low Transitions 55
- Threshold Voltage Setting V2 56
- Low-to-High Transitions 57
- To test time scale accuracy 59
- Oscilloscope 60
- Sine Wave Source 60
- Frequency Reference 60
- Agilent Technologies 64
- Range Supply Limits 65
- Performance Test Record 66
- Calibrating and Adjusting 67
- To run the self calibration 69
- Troubleshooting 71
- Default Setup 73
- 54830F01a 75
- Primary Trouble Isolation 76
- Run oscilloscope self-tests 77
- Self Calibration 78
- Performance” on page 37 78
- No Display Trouble Isolation 79
- Input Pin # 7 65432 1 81
- Replace any shorted assembly 84
- Replace the power supply 84
- To check probe power outputs 85
- To Check the keyboard 86
- To check the LEDs 87
- Intel D915GUX Motherboard 88
- To Reset 89
- 5 and 7 89
- To setup the BIOS 91
- Figure 5-12 93
- Software Revisions 94
- Replacing Assemblies 95
- Bottom sleeve fasteners 99
- Removing bottom sleeve 100
- Connecting Mylar flex sables 101
- Disconnecting W8 104
- Access Hole 105
- Removing the BNC nuts 108
- Figure 6-17 112
- Opening in side of 131
- Fan control board cables 131
- Acquisition board cables 131
- Figure 6-32 132
- Lift board out of chassis 134
- To remove and replace a fan 135
- Mylar flex cables 136
- T10 Torx Screws 136
- Replaceable Parts 137
- Power Cords 139
- Exploded Views 140
- Replaceable Parts List 145
- Theory of Operation 149
- Figure 8-1 150
- Logic Trigger 154
- Attenuator Theory 155
- Acquisition Theory 155
- • Trigger levels 156
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