Table of Contents
Advertisement
PX-7
Table 11-3
Inspection
2
test
flow
INSPECTION
2
TEST
FLOW
LED
#
-°
n
O-
Off
Test Description
Output
of Result
CENTRONICS CHECK
BOARD
LED PATERN
DISPLAY
OUT
SOUND OUT
STEP
1
Sound
and
LED
Outputs
Normal CPU,
CPU
peripheral
circuits,
gate
array,
and
printer
out-
put can
be checked
by
the generated tone
and
LED
pattern changes.
D7 D6 D5 D4
D3 D2
D1
DO
STEP PUSH
•
•••
oooo
STEP PUSH
o
•
• •
«ooo
STEP PUSH
o
o
•
•
•
•
o o
STEP PUSH
o o o •
•••o
STEP PUSH
OOOO
9
9 9
9
BEEP
ON
STEP
2
Title display
STEP PUSH
Oisplay of
title
on
screen,
and
VDP
opera-
tion
check
Initial
screen
settings
Border
color
Cyan
Background
color
Blue
Foreground
color
White
Title
PX-7
SELF TEST
BEEP
OFF
STEP
3
PPI
TEST
STEP PUSH
(1)
54H
and
08H
data
to PPI: write,
read,
and
verify
Now
testing
*9
0 0
0
0 0
0 9
PPI
TEST
1
-
When
result
isOK
*0*00
O
O
O
•
1
- OK
When
result
is
NG
'O
• • •
O O O
•
1
- NG
BEEP
Comment
'Meaning
of
LED
patterns
OOOO OOOO
L-r
1
l_i
i
—
i
,
i
—
i
Test
progress
Test
no.
rh
Test
result
1
rH
1
Now
testing-
• O
1
O O
O 9
—
-
Test
No.
1
Output
of
result
-
—
O
•
1
O
O •
O
—
»
Test No.
2
[
OK
O
O
(
f
[
NG
*
•
•
)
)
• O
•
O
—
Test
No.
10
• O
•
•
"Test
No.
1
1
(Binary
display)
All
steps
described
below
are
executed
in this
sequence.
Beep
tone
gener-
ated
when
result
is
NG
(2)
Check
that addres-
ses
4000
thru
7FFFH
are
switched
to
slot
#2.
STEP PUSH
Now
testing
• O
O O
00*0
2-
When
result
is
OK
0*00
O
O
•
O
2- OK
When
result
isNG
0
9 9 9
0 0
9
0
2-
NG
(3)
Check
that addres-
ses
4000
thru
7FFFH
are switched
to
slot
#
1
.
STEP PUSH
Now
testing
• O
O O
O
0 • •
3-
When
result
is
OK
0*00
O
O
•
•
3- OK
When
result
is
NG
O
• •
•
O
O
• •
3-
NG
BEEP
(4)
Check
that addresses
8000
thru
BFFFH
are
switched
to' slot
#1.
STEP PUSH
Now
testing
•
O O O
0*00
4-
When
result
is
OK 0 9 0 0
0 9
0 0
4
-OK
When
result
is
NG
O
•
•
•
O • O O
4-
NG
BEEP
66
Advertisement
Table of Contents
