Maintenance
Troubleshooting
This section contains information and procedures to help you isolate a defective
module in the MSO4000B Series and D PO4000B Series oscilloscopes.
WARNING. Before performing this or any other procedure in this manual, read the
General Safety Summary and Service Safety Summary found at the beginning of
this manual
, and, to prevent possible injury to service personnel or damage to
electrical components, read Preventing ESD. (See page 19, Preventing ESD.)
Adjustment After Repair
If you replace any circuit board assembly, you must adjust the instrument after
repair. Refer to the Adjustment Procedures section for information about the
adjustment. (See page 7, Adjustment Procedure.)
Required Tools and
Equipment
You need the following equipment to troubleshoot the instrument.
Tools and Equipment Example
DMM 3.5 digits or above
Test Points
Test points on the Main board are shown in the troubleshooting illustration. (See
Figure
6.)
Troubleshooting Procedure
The f
ollowing figures are troubleshooting procedure flowcharts. Use them to
troubleshoot an instrument failure. Begin with the Primary troubleshooting
procedure flowchart. (See Figure 5.)
WARNING. Before removing the cabinet, disconnect the power cord from the line
voltage source. Failure to do so could cause serious injury or death.
MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 25
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