Philips PCL304 - Video Diagnostics; Floppy Disk Diagnostics; Printer Port Diagnostics

6-4
6.4.4 Video Diagnostics
Procedure
eee ee So a aes ol
| Character Sets Display two ASCll character sets |
|
Diagnostics
and
check
them.
|
|
Gray
Scale
|
Diagnostics
|
olay and check them.
|
er
Attribute
Dia-
the
80°25
&
40*25
display.
|
|_gnostics
Graphic
Mode
to
verify
that
the
640*200
&
|
Diagnostics
320*200
graphic
mode
display
is
|
|
correct.
aaa
Procedure
|
I
|
One
Page
Display
Check
each
page
(1-3)
shown
on
|
|
on
Text
Mode
the
80°25
display.
|
| Diagnostics
6.4.5 Floppy Disk Diagnostics
Procedure
|
FDD
Reading/
Set
the
parameters
according
to
|
Writing
Diagnostics
|the
FDD
and
the
medium.
Repeat
|
|
the
following
procedure
oneach_
|
track
form
No.0
to
the
largest
No.;
|
READ
(INT
18H,
AH=02H)
and
confirm
that
reading
has
been
car-
ried
out
properly.
WRITE
(INT
13H,
AH=03H)
and
confirm
that
writing
has
been
carried
out
pro-
perly.
Then
compare
the
result
with
the
data
ofthe
reading
and
|
writign
test
to
confirm
that
both
va-
|
lues
are
equal.
Procedure
Perform the loop-back test in the
following procedures;
*Set the transferring rate (9600
bps)
*Set the transferring system (8
bits, none parity, and 1 stop bit).
*Is the received data equal to the
transmitted data?
*Check that no frame error, over-
run error, time-out error parity er-
ror have occurred.
CS 55 816
6.4.7 Printer Port Diagnostics
nector Diagno-
1 stics
Procedure
Perform the loop-back in the follo-
wing procedure:
*Confirm that the initialization has
been carried out properly.
*Transmit the data.
*Receive the data.
*Is the received data equal to the
transmitted data?
*Check that no I/O error, time-out
error have occurred.