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4. Troubleshooting
a. General
oii'lW
Next is discussed about troubleshooting regarding the--~DC9008
magnetic disk co~~?lIer. _
' ___________ " __
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a-1. Tool
,'-'1
The following tools are reqUired-for-tmblblestlJoting.
L_> __
1. Host system
ri
;:
g:~II~S~~~:le
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j~_
".')
4. DiagnostIC; program-
-- - - - I
_ J
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r-a_-2_._C_o_nLf_ig,-U_r_a_ti-,°rn_-.--'::".::l~_--+.I.'
.,'< ,' ,
_. ___
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L ______ _
Disk
HOST SYSTEM
_' iL. __
- - - - ""\/----
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--"r
/i
,i
PC
- •• oJ
,~
_ _ _ _ _ _ _ _ . _ _ _ _
----...J
u. ______ .___
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h
Check method
1) Finding the
C~tis"i--'
i
y ,
1
:.T;
r---- -
--==,-0=/
ACpower
source
rF'":F9'=="4.;;-
J
I
,)
i
I
,.J
Seek and write
I
-f)T
~~'~i
...
~~aiif~iictio:n----.
-, -
--I
-,,=,~~~
'---_~~-.---
' . ;
_~.
"-. _ "' - -' ; . .
----~ I~~~_'_·j-=~ _Ei~-'-;:_·;;_I.~;::·!~J._
-i
~-T~=~----
'_.IiL'''C6nltoller 'b.a.sflUtuo.e.ti:onaYcHeck!! . " .1
I _
The cantfciUer function1 is Checked to 8ge"l1t
pay/sF
on
Qr
reset 'unclioQ
;- is
workili-i{properfy~0-1--:!
LL -
;lOJ-ji;J;\;:~
---1--
~-,--I-- ~i--:
i
"ii) l[l,q"sjii
Z-!lO·~PU I~G);J;1F\EQ
(pjQ,ti[gH'(D IPlr·1S)
9uii>lifl~
i_- _
~~~'~~~-~1\1.:~~_- ~~._._.
__
.~~.~~~!'-- _~:,:, ~~,~~~~~\(~/~~_~-:~
- - --
~_- _~~_-!'
'-Caus",· MPU-BUSRQ·(pin
C
22)·al low-Ievel,,--
_
NDC864 in failure.
· MPU INT (pin·12) at low level:
_
NDC864 in failure
->
lS04 (40) in failure
· MPU RESET (pin·23) at low level:
_
NDC864 in failure
_
PST51 SA in failure
· MPU ClK (pin·1), S.OMHz not received:
_
Crystal X2 in failure
_
MPU in failure
c. Drive not ready
c-1) Ready signal check
Check the ready signal after power on.
c-2) Power save signal does not turn low
->
74HCT240 (SC) in failure
4-3
-
NDC870 in failure
c·3) Ready signal, does not .91) low even if the
power save
si~fn-ans
riohna.-'-
: - -- Drive uniLor....signaLdable -in _failure.
_
-.J :,:
, ____ ....
___ .
_
.. I
c·4) If the
r~~dy
sibl')ali is norma)[i,
iL
, __ 74HCT240!(9H) in faihJr~!
,1,,,,
-i' - ,-,;" ')
~
f;
I
rr
i
I' ;
!
I
d.
Eri'O~~tafUslfap~eafS-:-..:a:~kl'sqccessfUI
I
tChOmmant di
It I ran~f~r,L()L nC!j~~spOose
from
, e con rq er
..
L ; . '
'
• d-1. Check
~heJP4,andJ·IP5~,ji:'f'l,p~r;Il,I~9
setups
,
- n l
I
C,Al
I ,"
," 'J.-J,-'
,!,
,
'
• d-2. Command
tr~nifer'
not
~riablecf~~Em
if setup
is normal--........... _ .i
'
->
CNt orNDC864in failure
If;;r~~D.C86:4'is'~~aL{~~
the
I/O
address in
1 F7 (177) after power on to check that the [SOH]
is in the
statu~
register.
, _ ,
_
OVA38
~eJJ'Nt)t870J fri~ faiibt~J :~mut
31 /IU 0/\:38
1-3Tu~~
JiimlO) mOT)
gflii;-llJ;';~A
.fI01.398
,')j
001b]J 2i
;J1A Of
I":> 31 AD
"'l¥.DtfoHhli!/;at 2dai8'lI~EiKj3nClj r~~d'jcbmmand
An error evokes after a successful startup.
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,r]
!
)'1))1 O[1-~_~dj Se~KJr~rrar
i;c)"jl"JT): 2:
h;l;,mJW)'j
C;!;
i'i-l
'3!l1
no"l,
i-' "
-1,1' [Ii
'-TIlIJ~'"
l,-"''''fFT'
2"")'\
he 101-\);;;) -\"i0
",--j'
~.-'.\'" 'n"""'')"
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J
~
•
'Checr<~tn"eJ ste-p pUlSe ('C;I.~~, 3·i:pih-t.<i). .. , ;,~', :,_
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It
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d
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J.-'---;;'r/\/B9C'8c~~~~~f~i.hli
nrH
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1
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n
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'I .,-- \ -;.:. -, :'; .," i'
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n
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;71fiTC~49' (qpfliH"fai!I;l)!~: .::)il'~':·~
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1111"-1
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1'_':lm!3DiJ!~~~,-)I~P9n)1)I~:'l
I'J·,]t'; ':-)1:1
~ril"'-;
1'-»)")'1('<"1"
-.I,
""'D ,"'. ,,_·:r'··'f"I'-··''::'·-
. r . ,
-'_-:'
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.
dii(,~I~rb~m"-lI!f?lO~!:·N~Gri
C:;U()nm8;1'}:" ,jri! ,'.'JI)I :-,
i..;
311.)\
d.)!Jj·J
II'
':<~'~~2::RecYoril,in()f1'fb~H!d
at
8atai~errorli-!i'l ~:
'Inl
--'> _
Ch~bR:TP5(.'if '15fJ"Hz~i~rds'ciiiate'(i/-: :r,!:.~I~j
__ :'
,fiJJ ).
~J::,:u;'
"len5t:d~birraYedi'JrJrnJ:) -:);;'; ;,~ .. :;,)
:.:!1'L'
:''-'"i
'.l:H
,1-o.:lkJ1-
.oj,-;!)
)~~Db87{ikf~illif~ ,~'):'n:
,JrJ'~ -.ldJ ,~'L~ ():-;o:~_;;»:
,xi)
.Crystal (x1) in
failJr~n
:Ifij- Ij') id1Irh'J
~ru .,j":;~r
'3ril
:)1)3 I:;IL,
--
Check if sync is found.
___
1'-2QQQ.s":I:.5n~Js_
not
fo.~ndJ~<?f!I ~?~Jo_ne:~hot
outputj.:
. V1 in maladjustment
·VS123 (6F) in failure
-
-
-
- - .
,If lJeth are normal, but sync
wr~e
not found:
---?
Drive unit in failure
- NCL:2.00Q--irriailure
-
'GN2, 3-READIWRITE (pin·' 0) does not change high and low:
·NDC870 in failure (pin-22 does not turn high and low).
·PSTS18A in failure (pin·3 <loes not turn high).
·MC3487P in failure
-TTTT----- ,
.-~-
<~, \~
";,
i",.,i'
_:
: _, - ;
,_".' 1 A- ,
--
!if!8:~P.q[~l3iTt_is norm"~lr,blit re6d!dat~ 'a~~lrf6~LP!~~ced:
·Drive unit in failure
---?
If
read data are produced but an error is caused:
·If ECC error is seen: NGL2002 lri"failtlre:,:"
'"
I,',-~,J,;,_<"
·If address mark not found: : NGb,200o:.-iR-failure; _ -'-
_
Check method
Read TRIG INDEX (CN2, 3, pin· 18) olthe sector I only from the host.
g. Trouble at data seek and write
1. Seek error
Refer to Paragraph e.
2. Record not found
Refer to Paragraph e.
In regard to a write failure, there is a good possibility that the drive
unit is in failure.
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