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Maintenance
THS710A, THS720A, THS730A & THS720P Service Manual
6–35
Follow these steps to troubleshoot using diagnostics.
1. To execute the internal diagnostic tests, remove all input signals from the
instrument and then perform the following steps:
SCO
PE
UTI
L
ITY
System Diag
Loop Once
Execute
—
OK Run Test
2. A dialog box displays the result when the diagnostic tests completes. If any
test fails, the main board is probably defective. Replace it.
3. If all tests pass, press the CLEAR MENU button to continue operation.
4. You should be able to compensate the signal path of a functioning instru-
ment. To execute Signal Path Compensation, remove all input signals from
the instrument and then perform the following steps:
SCO
PE
UTI
L
ITY
System Cal
Signal Path
—
OK Compensate Signal
Paths
5. If Signal Path Compensation does not complete successfully, perform the
Factory Cal Scope adjustment on page 5–5 and then repeat step 4.
6. If all tests pass, press the CLEAR MENU button to continue operation.
7. If trouble persists, proceed to Input Connections.
Executing Diagnostics