Epson PX-8 Technical Manual page 236

REV.-A
4.1
Make sure that DI P
switch SW4 on MA-
PLE board is properly
set.
y
Type in all keys and
check for any char-
acter change or other
malfunctions.
Replace keyboard.
y
Trouble is in key-
board; possibly a
short circuit on a KSC
or KRTN line or lines.
Refer to 5.4.3, "Re-
pairing The Key-
board".
Reset SW4 and then
press INITIAL RESET
switch.
GO TO
Start.
GOTO
2.3
Check to see whether
trouble is caused by
row or column drop in
LCD.
y
Check whether char-
acter always changes
at the same position.
Replace LCD panel.
Replace SED 11 20 (X 1
to X8) for column(s) of
trouble.
GOTO
2.5
5-35
y
Check continuity of
FPC cable.
Replace FPC cable.