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11.
INSPECTION
ROM
INSTRUCTION
MANUAL
11-1
GENERAL
OUTLINE
The
PX-7
Inspection
ROM
Cartridges are
jigs
designed to
efficiently
analyze
Palcom PX-7 [BK]
/
HB/HE
failures.
The two
types of
cartridges
em-
ployed
are:
—
A.
INSPECTION
1
FOR
PX-7[BK]
(UK[HB/
HE]
)
VERSION
B.
INSPECTION
2
FOR
PX-7[BK]
(UK[HB/
HE]
)
VERSION
These
two
cartridges
are
used
in
the following
way.
Fig.
11-1
Check
[1]
Connect
the
display unit to
the
PX-7 and
switch the
power on
with nothing loaded
in
the
cartridge
slot.
Check
that
BASIC
is
started
up
(with
output
of the
initial
display
which then
switches
to
the
BASIC mode
select display).
After
selecting a
mode
by keyboard
input,
key
in
a
suitable
character to
check
for
normal
key
input.
If
key
inputs are normal, switch the
power
off,
and
insert
the
INSPECTION
1 car-
tridge into
the
cartridge
slot in
the front
of the
unit to
commence
the
test.
[2]
If
BASIC
fails
to
start,
open
the
bonnet and
remove IC13 (P-BASIC
ROM)
from
its
IC
socket.
Repeat
the
start
procedure
to see
if
BASIC
will start
up
or
not.
(The
BASIC mode
select
display
is
not obtained
in this
case
—
the
same
display as
when
MSX
BASIC
is
selected
(push
key
[2])
is
obtained
instead).
If
BASIC
is
started,
replace
the
defective
IC13 compo-
nent.
[3]
If
BASIC
still
fails
to
start
with
IC13
removed,
re-insert
the
component
into
the
IC
socket
and
load the
INSPECTION
2
cartridge in
the
car-
tridge
slot
in
the front
of the
unit to
commence
the
test.
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