Table Of Contents - Panasonic JU-475-4 Service Manual
Flexible disk storage drive
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Also See for JU-475-4:
- Service manual (33 pages) ,
- Service manual (34 pages) ,
- Service manual (33 pages)
Table of Contents
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PART I
1.
INTRODUCTION ......................................................................................................................................................................
2.
2.1
5.25inch FDD S eries................................................................................................................
3.
SPECIAL TOOLS ......................................................................................................................................................................
4.
OUTLINE OF M A IN T E N A N C E ................................................................................................................................................
4.1
4.2
Exerciser ....................................................................................................................................................
5.
DIAGNOSTIC PROCEDURES ..................................................................................................................................................
5.1
Error Symptom Recognition ....................................................................................................................
5.2
Soft Error Detection and Correction .......................................................................................................
5.3
W rite Error .................................................................................................................................................
5.4
Read Error ..................................................................................................................................................
5.5
Seek Error ..................................................................................................................................................
5.6
6.
TROUBLE ANALYSIS ..............................................................................................................................................................
6.1
6.2
Troubleshooting Flowchart ....................................................................................................................
6.3
Trouble Analysis Table ..............................................................................................................................
7.
8.
....................................................................................................................................................................
9.
ADJUSTMENTS AND VERIFICATIONS ................................................................................................................................
9.1
Motor Speed Verification (Index Period) ................................................................................................
9.2
Write Protect Verification ........................................................................................................................
9.3
Head Output Verification ........................................................................................................................
9.4
9.5
9.6
Radial Alignment Verification and Adjustment ....................................................................................
9.7
9.8
9.9
Track 0 Sensor Adjustment ......................................................................................................................
9.10
Asymmetry Verification ............................................................................................................................
10.
TEST P O IN T S ............................................................................................................................................................................
11.
PANASONIC ALIGNMENT DISKETTE ..................................................................................................................................
PART II
12.
REMOVALS AND INSTALLATIONS ......................................................................................................................................
12.1
PCB Removal and Installation ...................................................................................................................
12.2
Front Plate and Handle Removal and Installation .................................................................................
12.3
Track 0 Sensor Removal and Installation ................................................................................................
12.4
12.5
12.6
W rite Protect Sensor Assembly and Index Sensor Assembly Removal and Installation .....................
12.7
12.8
12.9
12.10
Drive Motor Removal and Installation ...........................................................................
12.11
12.12
Lifter Unit Removal and Installation .......................................................................................................
12.13
Media Lifter Removal and Installation ....................................................................................................
12.14
Media Sensor Assembly Removal and Installation .................................................................................
13.
EXPLODED VIEW ....................................................................................................................................................................
14.
REPLACEMENT PARTS LIST ..................................................................................................................................................
15.
REPLACEMENT PARTS LIST FOR PCB ..................................................................................................................................
16.
17.
CIRCUIT BOARD ......................................................................................................................................................................
18.
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