Service manual
PC
1600
tained media.
3) Type the command '
lOAD
"X:
CE
·1600F
"·
and
pu
sh
thel
EN
TE
Al
ke
y.
4) When the pr
ompt
symbol appears, remove t
he
test
pr
ogram stored disk and
turn
off the
PC
-
l600
,
5)
Dis
connect the test ins
ta
1lation CE·1600F from
the
CE
·1600P.
6) Conn
ect
the CE·l6OQF
to
be
tested with
the
CE·l600P.
7) Turn on the
PC
-l600.
8) Type
the
command 'A.(RUNI', then push
the
l
ENlER
I
key
,
9) When
the
prompt
is
issued fo r setting
of
the media,
insert
the
test media with
the
si
de A face up.
10) P
us
h
the
lENTER lkey. If o
th
er key
is
pushed, the test
r
es
um
es
from
8).
11) After continuous test
of
test items, 1 thru 4, "OK"
is
di
splayed when
th
e test has been successful .
If
not
successful,
th
e error is indicated on the display and the
print
er.
12) After successf
ul
ending
of
test items, 1
thru
4, remove
the
test
media and
se
t
the
side B
of
the media whose
write
protect
tab
is
set
to
WP,
13) Push
the
I ENTE RI key now
to
check
the
funct
i
on
of
the
write
protect
switch.
If
it has been successful, the
de$Cl'iption
is
printed and
the
test terminates,
14
) Dur
ing
this write protect test period, measure the +5VC
check point
of
the
in
terface board with
the
dc
vol
tmeter
to
check that it is within a
ra
n
ge
of 4.5VDC
to
5,5VDC
(5VtO.5V).
7-5, Write protect test
This
ten
is eonducted
to
eheck proper funct
io
ning
of
the
write
protect
of the floppy disk drive .
• Test description
• Check class 05
(C
HECK 05)
In
sertion
of
the media
is
checked after the motor has
turned on and functioning
of
the write protect
is
checked.
That
is,
it checks
that
it
is
the
media
that
write
prot
ected.
• Check ite
ms
1) During
th
e test (while the access LED
is
active).
measure the voltage across pads
at
two locations of
the pattern side using
the
de
voltmeter (6
to
10
VD
C)
to
ensu
re
that
it
is
5VDCtO.5VDC (4,5V - 5.5V).
2) When the access lamp goes
out,
make sure
that
5VC
is
now turned
to
OV
.
3) Aft
er
compl
et
i
on
of
the
test, che
ck
the
display
metsage
on
the
PC
-
1600
that
"O
K" is
on
display.
e·l
de
- 103 -
[<>-+-® side
5VC voltage test location (pattern side)