Servicing - Radio Shack TRS-80 Service Manual
Pocket computer printer and cassette interface
Hide thumbs
Also See for TRS-80:
- Reference manual (274 pages) ,
- User manual (236 pages) ,
- Service manual (199 pages)
Table of Contents
Advertisement
All
and
more
about Sharp PC-1500
at
http:/lwww.PC-1500.info
5. SERVICING
1)
Measures against irregular
condition
In
a
rare
cas~,
all keys
on
the keyboard might. become inoperative, including the
I
B~~KI
key, when a
strong
external noise
interference
IS
met or
when
a
strong unpact
is
given to
the maclune
body.
Whr
suclJa
condition
is encountered, keep the
ALL
RESET key pushed for a period of about 15 seconds while depressing
the
~
~
l(
key.
llRliAK
Oepressi
ng
I
ON
I
key
.
.........
'
'
All reset
Use
the
tip
of a ball point
pen
to
pus.h
the
ALL
RESET
SW. Do
not use the
tip
of somethinpuch as
a
pencil
of which the
tip
might break.
Also,
do
not
use
anything
with
a sharp
edge
such
as a needle.
Wait
for
the prompt
l"NEW
O?:
CHECK" to
appear on the
di<play,
then
push
ICLI
NEW
0 \ENTER!.
If
the prompt "NEWO•: CHECK" does not appear, try the
above entry
again.
DO not use
the ALL RESET switch
except
for the above
op
eration,
or destruction of
the
progtam,
dat
a,
and
reserve contents
Will OCCUI',
2)
How
to replace FPC (Flexible Printed Cable)
To replace the
FPC
that connect
the
Key
PCB
with the Operation
PCB,
the
following procedure should
be
used.
Soldering
Do not sale this PDF !!!
-17-
Since
the
Operation
PCB
is connected
with
the FPC
by means
of
the
crimp
metal,
the Key PCB
is dis·
connected
from the Operation PCB
after
removing
the
crimp metal.
Advertisement
Table of Contents
