Table of Contents
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r
r
PART. I
1. INTRODUCTION
This service manual consists
o
f
two parts,
Part I covering mainten<lnce description,
adjustment
procedures,
and trouble
ana lysis
lmd
Part II
disassembly and
reassembly p rocedures parts
list,
and PCB
circui ts.
Part I encompasses
mainte
nance
innructions for
all
FDD models. Refer
to
the
applicilble
items,
lind perform maintenance
work
on
th
e FOD.
2. MODELS AND MODEL NUMBERS
2.1
5.25·inch FDD
2.2 3.S-inch FOD
~'2'I
..
~~~'~'~'~'J--,--
48TPI
--'L--
JA·SSX
JU.455
JA ·550
L J A.551
l .5-inch FOO
96TPI
-
-,...
_ _
JA.56X - - -
,- -
JA
·560
L-
JA
•
561
JU·ssx
-
-
C L
-
-JU.581
JU·S85
JU
·59)(
-
- - , - -
JU
·591
L-
JU
.
595
61.STPI
-
-
--
-
JU ·31)(
-r=
JU·312
JU-313
J
U ·]
14
135TPI
I
JU':,2X
L
Ju
.
J6x
-r=
JU .322
J
U·323
JU
-J24
-r=
NJ6'
JU-363
JU-364
3. SPECIAL TOOLS
The fo
l
low ing
special tools
are used
for
FDO maintenance
.
TABLE 3.1
Part
No.
To
ol
S.25ti
n~ht~TP~
5
.2S.,
nch(95TPI)
'.·'6.'IU"U
,
..
·sa",.<1, ....
"
Exerciser
F
D
D·Ex:r~·S
. .
~
,.
~
Alignment
diskette
I
817-128
817-560
I
817·581
.,
Work
d iskette
,
2D,
~'
.
~,
2DD
2HD
.
----
----
CMOSmL
ada ptor
AI'"
Limmiter Adfust
Tool
(S.25-incl-l)
;;.
,
Oscil
loscope
(SO M
Hz)
.,'
Probe (10: 1)
"
.
,;;$l
Frequency
cou
nt er
.
-
"f'"
Not e:
*" _:
St
and
for
t he same
as
lett.
:
DAD (Dynam
ic
Alignment
Diskette)
- 1 -
3.S-inch
Qua nti ty
"'~
1
JU.(I 1AA
1-2
(DAD only)
2D
D
1-2
YTFDD-CN35
1
1
1
3
1
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