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10
DP-1520P/1820P/1820E
SEP 2004
Ver. 1.0
3. Reset Circuit
This Circuit is controlled by the Reset of IC9 (PST575E) and pSPCRST Signal from the SC PCB.
If the 5 VDC Power Supply Voltage drops below 3.9 VDC, this circuit generates a Reset Signal. If the
pSPCRST signal from the SC PCB is Low, this Circuit also generates a Reset Signal.
If the 5 VDC Power Supply Voltage drops below 3.9 VDC, this circuit generates a Reset Signal. If the
pSPCRST signal from the SC PCB is Low, this Circuit also generates a Reset Signal.
IC9
PST575E
pSPCRST
IC2
M30802
R57
C62
R60
Q7
5V
3. 9V
td
td
td =12.5ms
+5V
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