Panasonic JU-455-5

r
r
PART. I
1. INTRODUCTION
This service manual consists of tw o parts, Part I covering mainten<lnce de scrip tion, adjustment procedures, and trouble
anal ys is lm d Pa rt II disa ss e mbl y and reassembly procedures parts list, and PCB circuits.
Pa rt I encom passes ma in tenance in nruct ions for a ll FDD models. Refer to the app lic ilb le items, lind perform maintenance
w or k on the 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
LJA . 551
l . 5-i nch FOO
96TPI -- ,... __ JA .56X ---, -- JA· 560
L-
JA
•
561
JU · ssx - - CL - -JU. 581
JU·S85
JU·59)( - --,-- JU· 59 1
L-
JU
.
595
61 .STPI - -- - - JU ·31)( -r= JU · 312
JU-313
JU·] 14
135TPI I JU':,2X
L
Ju
.
J6x
-r=
JU.322
JU·323
JU- J24
-r=
NJ6'
JU-363
JU -3 64
3. SPECIAL TOOLS
The fo l lo w ing spe cial too ls are u se d fo r FDO mai nte nan ce .
TABLE 3.1
Part No.
To ol
S . 25 ti n~ht~T P ~
5.2S.,nch(95TPI)
'. · '6 . 'IU"U
, .. · sa ", . <1, .... "
Exerciser
F D D·Ex:r~ · S
.. ~
,. ~
Alignment disk ett e
I
817-128
817-560
I
817·581
.,
Wo rk diskette
,
2D, ~ ' . ~ ,
2DD 2 HD
.
----
----
CMOSm L adap tor
AI'"
Li mmiter Adfust Tool
(S.25-inc
l-l)
;;.
,
Osci lloscope ( SO MHz)
.,'
Pr obe (10: 1)
" .
, ;;$l
Frequency cou nter
.
-
"f'"
Note: *" _: Stand for the sam e as lett.
: DAD (Dynam ic Alignmen t Diskette)
- 1 -
3.S-inch
Quan ti ty
"'~
1
JU .(I1 AA
1 -2
(DAD on ly )
2DD
1-2
YTFDD-CN35
1
1
1
3
1