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5-9_ HL ARM HEIGHT
Disassemble the following parts and then perfonn
the adjustment_
a_ Main Cover (Refer to 4-5)
5-9-1_ Tools and Measuring Equipment
a. MFD Checker II
b. G:>2 mm Driver
c.
e
2 mm Driver
5-9-2. Measurement
a. Connect the disk drive to the MFD' Checker
II. (Refer to Fig. 2-1)
b. Move the head until it arrives at TRK 79.
c. Manually set the machine into the Disk-In
mode. (Refer to Fig. 4-9 (a) )
d. Push down the plunger core of the head.
load ass'y at point A. (Refer to Fig. 5-9)
Pad Arm
~
B-a3-a9mm
HLArm
==
Fig. 5-9 HL Arm Height Adjustment
e. Check if clearance B between the HL Ann
and pad ann is set at a value within the
range of 0.3 to 0.9 mm. (Refer to Fig. 5-9)
5-9-3. Adjustment
a.
If
the gap is not within 0.3 to 0.9 mm,
loosen the screw which fastens the plunger
solenoid and once push down the plunger
solenoid.
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HL Arm Height
b. Insert a
e
driver beneath the plunger
solenoid and slowly push up the plunger
solenoid until clearance B becomes the
specified value. (Refer to Fig. 5-9)
c. Fasten the screw and check again if clea-
rance B meets the specification.
5-10. HEAD CLEARANCE
Disassemble the following parts and then perfonn
the adjustment.
a. Main Cover (Refer to 4-5)
5-1~1.
Tools and Measuring Equipment
a. MFD Checker II
b. Round Nose Plier
c. Hexagon Wrench Torque Driver
5-10-2. Measurement
a. Connect the disk drive to the MFD Checker
II. (Refer to Fig. 2-1)
b. Move the head until it arrives at TRK 79.
c. Manually set the machine into the Disk-In
mode. (Refer to Fig. 4-9 (a) )
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d. After pressing the HL Arm twice or more,
visually check if the clearance between the
head and pad is within 0.1 to 0.4 mm.
(Refer to Fig. 5-10 (a»
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e. After pressing the HL Arm twice or more,
visually check if the clearance between
both heads is within 0.1 to 0.4 mm. (Refer
to Fig. 5-10 (b»
5-1~3.
Adjustment
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a. If the clearance is greater than 0.4 mm,
bend the HL Arm mounting plate down-
wards. (Refer to 5-10 (a»
_
b. If the clearance is less than 0.1 mm, bend,
the HL Arm mounting plate upwards.
(~efer to FiE:: 5-10 (a»
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c. If the clearance is out of the specified
range, turn the HL Arm adjusting screw
until the clearance is in the specification.
(Refer to Fig. 5-10 (b»
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d: After completion of the adjustment, fix
the adjusting screw with nut lock paint.
(Refer to Fig. 5-10(b»
Head Cleaning
Hexagon Wrench
Torque Driver
ta) OA·D32V
(b) OA-D32W
Fig. 5-10 HL Arm Height Adjustment
5-11. HEAD CLEANING
Disassemble the following parts and then make the
head clean.
a. Main Cover (Refer to 4-5)
5-11-1. Tools and Measuring Equipment
EE11 a. Applicator
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b. Alcohol
EE11 c. Cleaning Disk (OR-D29VA)
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d. Cleaning Disk (OR-D29WA)
e. MFD Checker II
EE115-11-2. 'Cleaning with Applicator
a. Manually lifting the pad arm, scrub the
head surface lightly with an applicator
containing alcohol
b. Scrub the head surface with a dry appli-
cator. Do not leave fine cotton fibers on
the head surface.
5-11-3. Cleaning with Cleaning Disk
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a. Connect the disk drive to MFD Checker II.
(Refer to Fig. 2-1)
b. Move the head until it arrives at an unused
track of the cleaning disk.
c. Set the cleaning disk in place, and hold it
for about 10 seconds. Thereafter, eject the
cleaning disk.
NOTE: Do
not use any scratched cleaning disk.
Do not reuse any used track because
reuse of the track weakens the cleaning
effect on the head.
NOTE:
Cross out numbers of the used tracks on
a cleaning disk
label,
shown in the
example, for avoiding reusage.
Cleaning Disk
Check Column
w
j:ji(
s><.
03
04 05 06 07 08 09
10 11
12
13
14 15 16 17 18 19
20 21
22
23
24 25 26 27 28 29
30 31
32
33 34 35 36 37 38 39
40 41
42
43 44 45 46 47 48 49
50 51
52
53 54 55 56 57 58 59
60 61
62
63 64 65 66 67 68 69
70 71
72
73
74 75 76 77 78 79
OR-029VA
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