Preventive Maintenance - Panasonic JU-475-4 Service Manual

7. PREVENTIVE MAINTENANCE
No preventive maintenance is necessarv for anv FDD under normal conditions.
However if adjustments are necessarv, the procedures in this manual must be followed.
e Adjustments (Refer to Table 8-1)
(1) Make a read/write head radial adjustment at the specified track. (Sides 0, 1)
(2) Make an index burst adjustment at the specified track. (Sides 0, 1)
(3) Make an azimuth measurement at the specified track. (Sides 0, 1)
CAUTION
Do not write when using alignment diskette. Check that write protect sensor is properlv operating
with a data diskette.
Note: Section 9 describes the adjustment procedure in detail.
8. SPECIFICATIONS
Table 8-1 Specifications
MINI (a) type
Drive motor is dual speed type. (300 rom e 360 rpm)
Parameter
| 1 jindexperiod |
Output level
Resolution
| 4 |
Radial Alignment
| 6 [Azimuth |
a [rado |
| 9 [Asymmetry |
Head load time
MINI (B) type
Drive motor is fixed speed type. (360 rpm)
Parameter
| Í |Indexperiod |
Output level
Modulation
| 4 [Resolution |
Radial Alignment
| 6 {Azimuth |
Index burst
[fa
E
Head load time