Epson PX-8 Technical Manual page 227

Replace sub-CPU
7508.
GOTO
Start.
Check whether
DI
P
switch SW4 is cor-
rectly set.
Replace IC 1
E.
y
Replace sub-CPU
7508.
N
Reset SW4.
y
Type all keys.
Replace IC 1
E.
5-26
Check outputs of pins
10 through 13 with
one malfunctioning
key held down.
Check outputs of IC
1 E pins 1 through 11
with above key held
down.
REV.-A
N
N