Tektronix 371B, Service Manual

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Maintenance
371B Service Manual
4-7
Diagnostics
The 371B has three sets of diagnostic routines.
Power-up diagnostics are run every time the 371B is powered up. There is a
default set and and an extended set that can be run during power up.
User-initiated diagnostics can be used to verify the operation of the
front-panel controls.
GPIB controlled diagnostics can be used by a GPIB controller to obtain
371B system ROM and RAM information.
The following provides additional information on each set of diagnostic tests.
There are seven power-up tests. Five tests are run automatically each time the
371B is powered up. Two additional (extended) tests can be run by pressing the
cursor SHIFT button and then powering up the instrument. These tests are listed
in Table 4–1 in the sequence they occur during power-up.
Table 4-1: Default and Extended PowerĆup Routines
Diagnostic Test Routine Default Sequence
Extended
After completing the power–up tests listed in Table 4–1, it displays the message
SELFTEST PASS and sets the front-panel settings to their default (initial state).
You can exit the power-up diagnostics by pressing the cursor SHIFT button
during power-up.
The following is a description of each power-up test.
Table 4–2 lists the ROM and RAM power-up error messages.
PowerĆup Diagnostics