Epson PX-8 - Page 212

REV.-A
5.2.6 Test Program Messages
The test program displays a message on the LCD panel when it terminates normally terminates.
When any malfunction is found, a diagnostic code indicates the problem area.
Major error messages are explained in the following:
(1) Return codes from slave CPU 6303
The slave CPU operation being performed when an error occurs is indicated on the LCD panel
as a
one-byte return code as shown in Fig. 5-30. Table 5-4 lists all the available return codes
and summarizes
their meaning.
I
Device
SYS
SYS
SYS
SYS
2CD
2CD
2CD
MCT
MCT
MCT
MCT
MCT
ESPS
ESPS
ESPS
BEEP
MCT
/
/
/
/
I
/ I
/ /
/ /
/ I
/
Fig. 5-30 Error Message Format
Table 5-4 Slave CPU Return Codes and Their Meaning
/
Code Meaning
00
Normal processing termination
01 Break ACK - Indicates
that a break took place.
02
Command error -Indicates that a command has been input which is not included in the de-
fined
system
03
Communication error - Indicates that a command is received when data was to be recei-
ved/sent or vice versa.
11 Illegal size -Indicates that a screen-over occured which is attributable to an illegal size
specification.
12 An undefined graphic alphabetic character was used.
13 An alphabetic character code was used. Or, an attempt was made to define any other than
that for alphabetic character.
41 Head error -Indicates that the head failed to operate normally.
42 The tape stopped during processing.
43
Write protect error - An attempt was made to write a tape with no write protect pin.
44 Data error -Indicates that the data could not be determined to be either 1 or 0 because the
data pulse is
wider or narrower than the standard value.
45 CRC error
61 A linkage failed.
62 Communication error - Overrun or framing error.
63 Timer over
71 BEEP already in progress -Indicates that a BEEP or MELODY was attempted when another
BEEP or MELODY was already in progress.
46 Block mode error - A block whose identifier is other than that specified.
5-11