Epson PX-8 Technical Manual page 222

REV.-A
Measure main (VB+)
and auxiliary battery
voltages.
(With no ac
connected)
Con nect ac adaptor
and turn POWER
switch ON.
y
y
Readjust VIEW AN-
GLE variable resistor.
GOTO
Possibly a short cir-
cuit on backup line
due to a defective ele-
ment. Find and re-
place defective ele-
ment through visual
check and physical
feel (for excessive
heat).
5-21
Connect ac adaptor
and start 8-hour
charge.
If main battery is bad,
open jumper J72
(overcharge control).
y
Measure main battery
voltage with ac adap-
tor connected (loaded
voltage) and discon-
nected (unloaded vol-
tage).
Possibly an open cir-
cuit in charging cir-
cuit.
Replace ac adaptor. Change ac input.