Epson PX-8 Technical Manual page 234

REV.-A
Adjust view angle var-
iable resistor as view-
ing LCD panel.
2.3
Replace SEDl130 in
faulty LCD unit.
GO TO
Start.
N
Check continuity bet-
ween FPC cable end
and soldering.
Replace FPC cable.
GOTO
Start.
2.4
POSSibly no trouble in
LCD unit. Check con-
nectors for any imper-
fect contacts and then
replace LCD un it.
Possibly a MAPLE
bc:>ard problem.
5-33
Measure relative vol-
tages from +5V of
pins 66, 67, 68, 71,
and 72 of SEDl130
(Yl).
Measure resistances
of resistors Rl
through R3.
Possibly a short cir-
cuit within LCD driver
Xl toX8 orYl.
Y
Measure maximum
voltage between pins
66 and 74 of
SED1320 as sliding
view angle variable re-
sistorVR1.
Check variable resis-
tance range of varia-
ble resistor VR 1.
Y