Available Tests - HP 9122D Service Manual

TROCBLESHOOTING
Self test
The self test
diagn~)stic
capability of the HP 91220/5 can be initiated in three ways: Power-on, Service in-
itiated, and Host initiated. The HP 9122 power-on self test tests the RA'\f, ROM, FOe and the HP-IB chips,
and performs a set!k test. The HP 9122 also performs an index period test if any media is in the disc drive
and a \Vrite/Read test if format':ed non write-protected discs are installed in the drive prior to powering on
the unit.
Available Test
The following Service Test are available on the
HP
91220/S products:
Test Number
0
RAM
ROM
2
HP-IB
chip
3
FOe chip
4
Drive 0 See,k
5
Drive
see,k
6
Motor 0 spe'ed
7
Motor
1
speed
8 *
Write/verify
disc 0
9
*
Write/verify
disc
1
10 *
Verify disc 0
11 *
Verify disc
12 Format disc
0
4--4
Test Time
1-2s
1-2s
1 -2s
1 -2s
2-3s
:2-3s
:2-35
:2-3s
:2
min.
''}
,,"
min.
min
min.
min.
Test DescriPtion
All patterns are written in all
locations of RAM
A checksum calculation is performed
Two of the registers are written and
their content verified.
Two of the registers are written and
their content verified.
Commands are given to the FOe to move
the head on and off of track
o.
The
track 0 indicator is checked to see that
movement occurred.
Same as above but on drive 1.
The head is stepped to track 35 and
loaded. The period of the index pulse
is measured and compared against the
specification. No test
if
no media in
drive.
Same as above but on drive 1.
Write on every sector
~f
the disc and
verify the data written.
Same as above but on drive 1.
All sectors in the data area of the disc
are checked for CRe errors.
Same as above but on drive 1.
The disc is re-initialized with a
011
data pattern.