Y-E Data YD-380 User manual

VY·E DATA
MAINTENANCE MANUAL
YD-380
HALF HEIGHT, HIGH DENSITY, DOUBLE SIDED
5.25 INCH FLEXIBLE DISK DRIVE
Contents of this manual may be changed without notice.
Check the revision number when placing an order.
September 1983
FDL-523006
REV. A

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Date
..
~ptember
--
--
-
.-
-
--
-
~ote: I~"
('21
Revisions
Rev.
Description
Revised Pages
83 A First Edition
publication
----~e YD-380 may be referred to as simply a "drive".
~=~e 5.25 inch flexible disk may be referred to as simply
~ -. disk.

YD-380 Maintenance Manual
TABLE OF CONTENTS
1.0 INTRODUCTION
2.0 MAINTENANCE TOOLS AND TEST EQUIPMENT
2.1 Maintenance Tool List
2.2 Maintenance Supplies List
2.3 Test Equipment
2.4 Exerciser
3.0 PREVENTIVE MAINTENANCE
3.1 General
3.2 Visual Check
3.3 Cleaning
4.0
SERVICE CHECKS,
REPLACEMENT AND ADJUSTMENT
Maintenance
Level 1
4.1
PWB
4.2 Index Sensor Assembly
4.3
Track 00
Sensor Assembly
4.4
Write
Protect Sensor Assembly
4.5 Media Sensor Assembly
4.6 In Use
Lamp
Assembly
Page
1
1
1
2
2
2
3
3
3
3
4
5
6
9
11
12
14

TABLE OF CONTENTS
~Aintenance Level. 2
4.7 Carrier Assembly
4.8 Index Lamp Assembly (on Motor Control PWB)
4.9 Drive Motor Assembly (on Motor Control PWB)
4.10 Head Load Solenoid
4.11. Front Lever
4.12 Front Bezel
4.13 Stepper Assembly
4.14 Head/Carriage Assembly
5.0 PARTS/ASSEMBLIES PHYSICAL LOCATIONS
6.0 TEST POINT/CONNECTOR PIN ASSIGNMENTS
7.0 SPARE PARTS LIST
8.0 SCHEMATIC DIAGRAMS
9.0 EXPLODED VIEW
10.0 USING A CLEANING DISK
Page
15
16
17
18
21
U
23
24
30
35 .
38
39
42
43

1.0 INTRODUCTION
This manual describes the maintenance and operation of the Y-E
DATA YD-380 two sided, high density, 5.25 inch Floppy Disk Drive.
Included is information on service checks, removal and replace-
ment procedures, and also adjustment instructions for customers'
engineers.
2.0 MAINTENANCE TOOLS AND TEST EQUIPMENT
The following tables list the maintenance tools, maintenance
supplies, test equipment and exerciser for the YO-38D.
2.1 Maintenance Tools List
TOOL
Y-E DATE PIN
Phillips Screwdriver (for M3)
141034-01
Phillips Screwdriver (for M2.6) 141627-01
Flat Head Screwdriver
141035-01
Cutters
141039-01
Needle Nose
Pliers
141040-01
Tweezers 141042-01
CE Disk
145173-01
Cleaning
Disk
145174-01
Hex
Wrench
1.27
mm 140266-03
Hex
Wrench 1.5 mm
140266-01

2.2 Maintenance Supplies
Supplies
Y-E DATA PIN
Tie Wrap (TY-23M,
Kitagawa)
031005-01
2.3 Test Equipment
Test Equipment
Multimeter
Electronic Counter*
Oscilloscope*
* For use at Maintenance Level 2
2.4 Exerciser
Equipment
Exerciser
Y-E DATA PIN
YD-164T

3 .0 PREVENTIVE MAINTENANCE
3.1 General
In a reasonably dust-free environment, preventive maintenance
should be performed on the YD-380 every two years. This
includes a visual check and cleaning.
In a dirty environment, the interval between maintenance checks
should be shortened •
.
3.2 Visual Check
Visual inspection should be the first step in any ma~ntenance
operation. Always look for corrosion, dirt, wear, binds, and
loose connections. Checking for these problems can help reduce
downtime later.
3.3 Cleaning
All cleaning of the YD-380 should be performed carefully.
Remove gently all dus~ deposits with lint free gauze or an
applicator moistened with isopropyl alcohol.
CAUTION
The head/carriage assembly is adjusted and tested at
the factory and is not field serviceable. Do not, for
any reason, attempt to repair this component.
Check
Points for Preventive Maintenance
Part
Check
Correction
Frame
Dirt and
dust
on
the connectors,
Connectors other areas.
Clean
sensors,
Sensors
Misc.
Loose
Screws
Tighten

4.0 SERVICE CHECKS, REPLACEMENTS AND ADJUSTMENTS
This chapter contains detailed maintenance procedures for the
assemblies listed below. Note that the list is separated into
two maintenance levels:
Levell:
Level 2:
Can be performed without special training or tools.
Special training and tools required.
Level 1
4.1 PWB
4.2 Index
Sensor
4.3
Track
00 Sensor
4.4 Write
Protect Sensor
4.5 Media Sensor
4.6
In Use Lamp
Level 2
4.7 Carrier
4.8 Index Lamp (on Motor Control PWB)
4.9 Drive Motor (on Motor Control PWB)
4.10 Head Load Solenoid
4.11 Front Lever
4.12 Front Bezel
4.13 Stepper
4.14 Head/Carriage Assembly
Note:
Refer to Chapter 5 for Parts/Assemblies Locations,
Chapter 6 for Test Points/Connector Pin Assignments and
Chapter 9 for Exploded View.

[ Levell]
4.1 PWB (Refer to Chapter 5, Figure 1)
4.1.1 PWB Replacement
1. Disconnect the 4 connectors (J1, J2' J3, J4) from the PWB.
2. Remove the four screws securing the PWB to the frame
casting.
3. Remove the PWB.
4. For reinstallation, reverse the above procedure.
Note: Make sure to mount the PWB below the carrier cover when
reinstalling.
J4 Connector
J3 Connector
o
I
PWB Screws
Screws
(with lock and washer)
4-M3 x6
Figure 4.1.1
Jl Signal
Connector
,--,
I ,
, I
,:
I ,
--
J2 Connector

4.2 Index Sensor Assembly (Refer to Chapter 5, Figure 3)
4.2.1 Service Check~
1. Power up the drive.
2. Without inserting a disk, move the lever to lock position
and check for a to 0.5 V between the PWB connector J3 Pin
All and G (GND). Next, insert a disk and close the door;
the vol tage at the same points should be 2.5 to' 5.25 V'.
4.4.2 Replacement
1. Remove the PWB (Refer to 4.1)
2. Remove J3 connector housing 6. (Refer to Page 9, figure
4.2.2)
3. Take out the carrier cover screws and remove the carrier
cover. '
4.' Lift, up the lead clamps slightly and pullout the leads.
5. Remove the In Use Lamp.
6. Take out the screws for the front lever and carrier assem-
bly, and remove the front lever and carrier assembly.
7. Take out the screws to the Write Protect Sensor assembly,
and as shown in figure 4.4.1, remove the write protect
sensor assembly by pushing in the direction indicated.
CAUTION
When clamping the leads, be careful not to damage the
lead insulation.
8. For reinstallation, reverse the above procedure.
9. Perform a service check. (See 4.l.l)
Note: Make sure the front edge of the carrier plate spring
arm securing the Ready/Off plate does not come in
contact with the leads.