r.
after cleaning the surface carefully with -alcohol -and gaufce.
2. Never remove the plate of the stepping motor A s s '
y since they
are combined each other.
(7) Install the stepping motor in item (6) according to the reverse order
of items (1) through (4).
a-
_ .
^ ^ "r rrr
(8) Loosen the screw which fixes the belt to the capstan.— P
(9) After moving the head carriage several times manually,
tighten the
fixing screw of the steel belt in item (8) carefully with the specified
torque.
At this time, be carefull so that the belt is tensioned
straightly.
Pay attention not to damage the surface of the belt or
the capstan.
—
~
(10) Loosen the fixing screw (Fig.506, S8) of the track 00 stopper (Fig.506,
No.4) to shift the stopper toward the rear side of the FDD.
(11) Make the head seek continuously between the track DO and the innermost
track and confirm that the steel belt does not meander nor undulate.
When the SKA is used, key in ^06* for this check and key in ^F" for stop.
If there is some abnormal running of the steel belt, xeadjust the
belt with two screws in item (4) and one screw in item (8).
After
the adjustment tighten the screws carefully with the specified torque.
(12) If the steel belt is replaced, execute the continuous seek in item (11)
for five minutes, approx.
(13) Adjust the track alignment according to Item 4-4-13.
*
(14) Adjust the track 00 sensor position according to item 4-4-14.
(15) Adjust the track 00 stopper position according to item 4-4-15.
- 4123
Summary of Contents for FD-55 Series
Page 7: ...SECTION 3 THEORY OF OPERATION 300...
Page 8: ...3 1 CONSTRUCTION AND FUNCTION 3 1 1 General Block Diagram Fig 301 General block diagram 301...
Page 23: ...Fig 308 Control circuit block diagram 316...
Page 40: ...SECTION 4 MAINTENANCE 4000...
Page 56: ...J4 J12 Option J9 J5 Top view of the FDD Fig 401 Types of connectors 4016...
Page 95: ...Note Refer to item 4 2 1 as to handling of the set screw 4057...
Page 102: ...k Key in Cl SET TMAX L Confirm as in item j 4064...
Page 104: ...Notch B position TP6 voltage 0 5V Max LED indicator Fig 422 Check of file protect sensor 4066...
Page 125: ...k Eject the level disk and release the Invert and ADD modes of the oscilloscope 4087...
Page 136: ...Fig 431 Adjustment track alignment 4098...
Page 153: ...Fig 436 Adjustment of index sensor 4115...
Page 172: ...Fig 440 Replacement of head pad 4134...
Page 176: ...Plate Fig 441 CSS Ass y and shift lever position 4138...
Page 177: ...SECTION 5 DRAWINGS PARTS LIST 500...
Page 179: ...r Fig 501 External view No l 502...
Page 181: ...PCBA DD motor servo Fig 503 External view No 3...
Page 182: ...Fig 504 External view No 4 505...
Page 183: ...Partis nrnnber of the FDD Fig 505 Extemal view No 5 506...
Page 188: ...Fig 506 Mechanical section break down 511...
Page 199: ...PCBA DD MOTOR SERVO PARTS LOCATION Type S i 522A...
Page 200: ...PCBA DD TOR SERVO PARTS LOCATION Type TO 522B...
Page 201: ...PCBA DD MOTOR SERVO PARTS LOCATION Type G 522C...
Page 202: ...PCBA DD MOTOR SERVO PARTS LOCATION Type T 522D...
Page 204: ...523B PCBA DO MOTOR SERVO SCHEMATIC Type K...
Page 205: ...o 523C i 1 PACB DD HOTOR SERVO SCHEMATIC Type G...
Page 206: ...CV 5 3 3 H 2SV 523D PC DD M o t o r SERVO SCHEMATIC Type T...
Page 207: ...PCBA MFD CONTROL B PARTS LOCATION PCB ISSUE A G 524A...
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Page 209: ...PCBA FRONT OPT PARTS LOCATION 525 PO I...
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