A
ll
and more about Sharp PC-1500
at
http://www.PC-1500.info
5.
STERVICING
1) Measures against irregular condition
sR.ll
In
a rare case, all keys on the keyboard might become inoperative, including
the~
key, when
a strong
external noise interference is met
or
when a strong impact is
given
to
the machine body.
When such a condition
is
e
j
i~ptc
r
d,
keep the ALL RESET key pushed for a period of about 15
sec
on
ds while .depressing the
:~
K
key.
BRFAK
Depressing I
ON
I key.
-.
AU
resbt
Use
the tip
of
a ball point pen
to
push the ALL RESET
SW.
Do not
use the tip
of
something such
as
a
pencial
of
which the tip is liable
to
break. Also,
do
not use anything
with a sharp edge such
as
a needle
up.
Wait
for the prompt l"
NEW
O?:
CHECK"
to
appear on the display, then push I
CU
NEW
0
I
ENT
ERI.
If
the prompt " N
EW
O?:
CHECK" does not appear, try the above entry again.
Do not use t
he
ALL RESET switch except
fo
r the above operation, or destruction
of
the. program,
data, and reserve contents
will
occur.
2) How
to
replace
FPC
(Flexible Printed Cable)
To replace the f
PC
that connects the
Key
PWB
with the Operation
PWB
,
the
following procedure
should be used.
2-1. Removal
Saldering
Do
not sale this PDF
!!!
Since the Operation
PWB
is
connected with the FPC
by
means
of
th
.e crip metal, the
Key
PWB
is
disconnected
from the Operation
PWB
after removing the crimp
metal.
19
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