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PX-7
11-3
INSPECTION
2
INSPECTION
2
is
an
8K
byte
program
consist-
ing
entirely
of
machine
language,
and which
is
activated
by
inserting
the
program
in
0000H
thru
1FFFH
in slot
#0
(in
front
of
unit)
by
the
slot
#0/siot
#1
switching described
above under
"CPU
Ass'y
TP1 Thru TP4
Functions".
(FRONT)
(REAR)
Fig.
11-8
Memory map
Connections
•
Connect
the
RF,
VIDEO,
or
RGB
output to
the
display
unit.
•
Connect
the
FROM
PC
terminal
on
the
CEN-
TRONICS
CHECK BOARD
to the
PX-7 PRIN-
TER
terminal
by
using
MSX
printer
cable.
•
Connect
a
+5V
power
supply
by
using the
alli-
gator
clips
connected
to
the
TO
IF
terminal
on
the
CHECK
BOARD.
*
This
+5V may
also
be
supplied
from
the
PX-7
unit.
•
Switch
the
CENTRONICS
CHECK BOARD
SINGLE/CONTINUE
selector
to the
SINGLE
position.
*
SINGLE
Test executed
in
single
steps
each time the
STEP
button
is
pressed.
CONTINUE
.
.
.Tests
executed continuously
in
succession
—
useful
in
aging
test.
•
After
first
removing
the bridge connecting
JPA
to
JPB
(repaired
from
the
component
side)
or
the bridge connecting
JPC
to
JPD
(repaired
from
the
soldering
side)
connect
TP1
to
TP3
and
TP2
to
TP4
to interchange
slot
#0
and
#1.
•
Insert
the
INSPECTION
2
cartridge
in
the
front
panel
CARTRIDGE
slot.
• Adjust the
VOLUME
and
MIXING LEVEL
con-
trols
to
the
central positions to
ensure that the
sound output
is
at
an
audible
level.
After completing
these
settings,
switch the
PX-7
power on
to
proceed with
the
tests listed
in
the
Test Flow.
Test
results
can be checked
by
display,
sound
output,
and
LED
lamps. Therefore,
if
one of
the
functions
fails
to operate,
checks can
still
be
exe-
cuted
by
using the
remaining
functions.
INSPECTION
2
ROM
CARTRIDGE
Fig.
11-9 Connections
Test
Flow
Sound
output,
LED
ON
X
^j
tle
display
j
PPI
TEST
STEP
1
STEP
2
STEP
3
STEP
4
STEP
5
STEP
6
5H
Fig.
11-10 Test
flow-chart
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