HP 9130K Service Manual page 50

SYSTEM RESET
DRIVE SELECT VALIDATE
SELECT HD 1
MOTOR ON
IF & 2F WRITE ENABLE
WRITE IF
WRITE 6J..ls DIPULSE
WRITE 2F
WRITE 3J..ls DIPULSE
Maintenance
5-15
Resets the entire system and disc drive. DSU self test is
initiated and the disc drive is recalibrated and initialized.
Validates drive number. Pushbutton indicator lights when
drive number is valid.
Selects read/write head. When indicator is on, head 1 is
selected; when indicator is off, head 0 is selected. At DSU
power-on and reset, head 0 is selected.
Turns spindle motor on and off. Indicator is lit when spin-
dle motor is running.
Enables the DSU to write to the disc drive.
Writes l' s (125kHz) on disc. Pushbutton indicator lights
when WRITE IF is selected.
Writes 0' s (250kHz) on disc. Pushbutton indicator lights
when WRITE 2F is selected.
NOTE
If a write pushbutton is depressed and released in less than 1.5
seconds, the write operation lasts for one complete revolution of
the disc. Holding the pushbutton depressed longer than 1.5
seconds produces a continuous write.
MAX TRACK
MIN TRACK
STEP RATE
SEEK TO TRACK
ALT SEEK
Enters keypad number selected for alternate seek max-
imum track number. Indicator flashes when number en-
tered is less than the current alternate seek minimum track
number. At power-on or system reset, the maximum track
number is reset to 76.
Enters keypad number selected for alternate seek minimun
track number. Indicator flashes when number entered is
greater than the current alternate seek maximum track
number. At power-on or system reset the minimum track
number is reset to O.
Enters keypad number in milliseconds selected for track-
to-track seek time. Pushbutton indicator flashes if number
is less than 3. At power-on and reset the number is set to 3.
Disc drive seeks to track number selected by keypad. If
number selected is greater than 34, disc drive seeks to
track 34. At power-on and reset, the drive seeks to track 0
automatically and the keypad is reset to O.
Disc drive seeks between keypad selected minimum and
maximum track numbers. Pushbutton indicator is lit during
seek operation. At power-on and reset, alternate seek is
set to occur between tracks 0 and 34.