Maintenance
7-9
If the Model 7001 does not retain the settings, one of the
following problems may exist:
• Failure to retain the card number 9990 indicates a
fault with EEPROM.
• Failure to retain the SCAN LIST indicates a fault
with battery backed up RAM.
7.6.4 Built-in-tests
The Model 7001’s main circuitry can be veriÞed
through the use of the “Built-In-Tests” (BIT). The BIT
can be executed in automatic or manual modes. Manu-
al mode can be used to execute individual tests, or to
cycle tests indeÞnitely for specialized troubleshooting.
Automatic test mode
Automatic testing provides a quick scan of most major
Model 7001 circuit blocks, and can be invoked using
the following steps:
1. Press the MENU key.
2. Select the TEST option and press ENTER.
3. Under the TEST MENU, select BUILT-IN-TESTS
and press ENTER.
4. Under BUILT-IN-TESTS, select AUTO and press
ENTER.
5. Under CONTINUOUS REPEAT?, select NO and
press ENTER. This will run the test once. For con-
tinuous cycling of the tests, select CONTINUOUS,
and press ENTER. The tests will execute until you
press EXIT. Automatic continuous mode may be
used to scan for intermittent faults.
As the tests cycle, the display will show the message:
NNN.NN Running A
or
NNN.NN Running AC
where “A” signiÞes “Automatic”, “AC” signiÞes “Au-
tomatic/Continuous”, and NNN.NN is the number of
the test being run.
At the conclusion of successful testing, the display
should indicate no faults:
All tests complete
Press any key to continue
If a test fails, an asterisk “*” will appear in the top line
of the display, and the second line will advise on fur-
ther steps:
All tests complete *
Press ENTER to review or EXIT
To review the error, press ENTER. The display will
show the test which failed. For further information on
the failure, press INFO. A detailed description of BIT
faults may be found later in this section.
Manual test mode
Manual testing permits execution of individual Built-
In-Tests options to help isolate faults. The BIT may be
executed in manual mode as follows:
1. Press the MENU key.
2. Select the TEST option and press ENTER.
3. Under the TEST MENU, select the BUILT-IN-
TESTS option and press ENTER.
4. Under the BUILT-IN-TESTS menu, select MANU-
AL option and press ENTER.
5. Press the and cursor keys to select the de-
sired test number, then press ENTER to invoke the
test. The INFO key can be pressed for a short de-
scription of any test function.
• 100
EPROM test
• 101
RAM test
• 102
EEPROM test
• 103
Digital I/O:
103.1-103.4
Digital Output bits 1-4
103.5
Digital Input
• 104
IEEE-488 test
104.1
Handshake Test
104.2
IEEE-488 Data
• 105
Trigger tests
105.1-105.6
System Trigger Bus
105.7
External Trigger/Channel Ready
105.8
Group Execute Trigger (GET)
105.11-105.18
Trigger Shorts tests
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