Tektronix 1730 Series, Instruction Manual

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1730–Series Maintenance
6–7
The following procedure is designed to assist in isolating problems, which in
turn expedites repairs and minimizes down time.
1. Ensure that the malfunction exists in the instrument. This is done by
making sure that the instrument is operating as intended by Tektronix (see
Operating Instructions in Section 2), and by checking that a malfunction has
not occurred up stream from the waveform monitor.
2. Determine and evaluate all trouble symptoms. This is accomplished by
isolating the problem to a general area such as an assembly. The block
diagram is a valuable aid in signal tracing and circuit isolation.
CAUTION. Probes and Meter Leads:
3. Determine the nature of the problem. Attempt to make the determina-
tion of whether the instrument is out of calibration or if there has been a
component failure. Once the type of failure has been determined, proceed on
to identify the functional area most likely at fault.
4. Visually inspect the suspect assembly for obvious defects. Most
commonly these will be broken or loose components, improperly seated
components, overheated or burned components, chafed insulation, etc.
Repair or replace all obvious defects.
5. Use successive electrical checks to locate the source of the problem. The
primary tool for problem isolation is the oscilloscope. Use the Performance
Check Procedure (located in Section 5) to determine if a circuit is operating
within specifications. At times it may be necessary to change a calibration
adjustment to determine if a circuit is operational, but since this can destroy
instrument calibration, care should be exercised. Before changing an
adjustment, note its position so that it can be returned to its original setting.
6. Determine the extent of the repair. If the necessary repair is complex, it
may be advisable to contact your local Tektronix field office or representa-
tive before continuing. If the repair is minor, such as replacing a component,
see the parts list for replacement information. Removal and replacement
procedures for the assemblies can be found under Corrective Maintenance.
General Troubleshooting
Techniques