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I f the test passes , proceed to Step 4 . I f the test fai l s , perform
3 .
the check on the cable .
defective .
I f the cable i s functioning properly , replace the p l anar
board .
4 .
Remove the wrap cable instal led in Step 1 and reconnect any other
cable that may have been removed in step 1 .
5 .
P lace a non write protected scratch diskette in the drive to b e
tested .
for Test 2 n (n
6 .
Call
diskette drive 0 , Test 21 tests diskette drive 1 , etc.
in Sect ion 3 . 7 . 1 , "Keypad and Softkey Echo Test - - Test 1 9 . "
Respond to prompt on the CRT by entering 8 for 8 11 , 1 or 2 for s ing l e
7 .
o r doub le - density, and 1 o r 2 for s ingle - o r doubl e - s ided .
the FlO key or the EXEC softkey .
the CRT .
Repeat Steps 5 and 6 for a l l 8 " diskette drives in your system .
8 .
9 .
I f one diskette drive fails , replace that drive .
drives in a diskette drive assembly fai l , replace the diskette drive
as sembly .
3 . 8 . 2
HARD D I S K A N D HAR D D I S K CONTRO LLER BOA RD TESTS
40-43
TESTS
A N D 13
The hard disk drive is connected to the IBM 9 0 0 1 through the ports on the
hard disk cont ro l l er board .
disk controller board.
"Keypad and Softkey Echo Test - - Test 1 9 . "
system is equipped with a sensor I /O board, remove the sensor I / O board ,
and repeat Test 1 3 .
I f the test fai ls , replace the hard disk controller board .
I f the hard disk control ler board is not at fault and the hard disk i s
continues t o malfunction, the fault may b e o n the disk drive or i n the
interconnecting cab l e .
drives 0 through 3 respective ly .
Softkey Echo Test - - Test 1 9 . "
See Chapter 4 , "Cable Checks . "
Optional Diagnost i c , Voltage , and Resistance Checks 3 - 14
See Chapter 4 , "Cab l e Checks . "
number of diskette drive ) .
=
The test results are disp l ayed o n
Test 13 checks the funct ioning of the hard
To c a l l for the test , see notes is Section 3 . 7 . 1 ,
I f the test passes , replace the sensor I / O board .
Call for Tests 4 0 through 4 3 to check hard disk
See notes in Section 3 . 7 . 1 , "Keypad and
Also check the interconnecting cab l e .
Replace i f
Test 2 0 tests
See notes
I f a l l diskette
I f Test 1 3 fai ls and your
Pres s
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