C-8  Accessory Installation Guide 
31.  Switch the  disc  memory 
on 
and 
press the self-test switch  (see Figure 
C-4). 
Upon 
completion  of  the test,  the  LED  display  should  have  only  the  right-most LED 
on 
(under the  * of the ABCD* label). Any 
other 
final 
LED 
display pattern indicates that 
the test has failed. 
32. 
If 
the 
above 
test failed, 
repeat 
the test by pressing 
and 
releasing the self-test switch. 
Should 
the test repeatedly fail,  refer to the troubleshooting procedures in Chapter 3. 
CAUTION 
THE 
FOLLOWING  TEST 
WILL 
WRITE 
OVER 
AND 
DESTROY 
ANY 
DATA 
ON 
THE 
DISC. 
USE 
ONLY 
BLANK, 
INITIALIZED 
DISCS 
TO 
PERFORM THE TEST. 
33.  Insert 
an 
initialized, write enabled, scratch disc into the drive(s) 
and 
close 
the 
door(s). 
Refer 
to 
Figure 
C-4 
for the following steps. 
34. 
Push 
the write self-test enable. switch 
and 
hold it in while pressing the self-test switch. 
Release both switches. This test 
will 
successfully 
end 
in 
the 
same 
manner 
as 
the 
test in 
step 29. 
If 
it 
does not, try repeating it in the same manner. Should 
it 
again fail, replace 
the disc(s) 
and 
test again. 
If 
the test still  repeatedly fails,  refer to the troubleshooting 
procedures in 
Chapter 
3.  . 
35. 
With successful completion of the above tests, 
power 
down the unit.  Re-connect 
the 
HP-IB interface cable, re-insert the front panel insert, 
and 
the unit is ready for use.