Function Of Prevention Circuit - Epson PC AX Technical Manual

PRINCIPLES OF OPERATION
REV.A
more
20 msec
more
Cl00V) (When A
I
Osec.more
I
1
I
I
I . . . ,
I
,
I
I
I
-~
I I
I
I
I
\
I
I
'\ 1msec
I
I
AC
OC
P.G.
I
I
I
Power ON
I
I
I
Power OFF
FIGURE 2-2-23. TIMING CHART OF POWER GOOD SIGNAL
TABLE 2-2-1. FUNCTION OF PREVENTION CIRCUIT
Detecting voltage or
Detecting current
Condition after
detecting
Overvoltage
detector
+
SV
+12V
-12V
- SV
5.5 volts - 7.0 volts Cut all output off.
To recuperate
condition, turn off
AC, then on after
30 seconds.
Overcurrent
prevention
circuit
+
SV
+12V
-12V
- SV
3sA
16A
3A
3A
Cut all output off.
To recuperate
condition, turn off
AC, then on after 30
seconds.
2-16