6.2 CPU Peripheral Circuit
6.2.1 PC-8201 Abnormal Power Supply
Turn on PC-8201 power.
bymptoms
Nothing is displayed on the LCD.
-
-
(1)
Process of checking
a)
M'hen using
a
battery
1:
Is
the voltage of the battery cassette
6
V?
2:
Is
6
V of power being transmitted to CN3 (P3) on the power board?
b)
When using a DC adapter
1:
Is
the
9
V
power supplied to DC adapter?
2:
Is the
9
V
power supplied to CN3 (P3) on the power board?
If
it
is not supplied there, the adapter jack connection is bad or
D8
is bad.
c)
When using a battery or DC adapter
1:
Is
the
signal transmitted to each part in Figure
6.
l?
Figure
6.1
Power
Supply Circuit, Output Signal
To Next Page
