Panasonic DP-1510P Technical Manual page 20

1.1.10. Laser Printer Motor Drive Circuit
1. System Description
It consists of 16 bit CPU M30802. The CPU controls mechanism of Laser Printer, Fuser Lamp
temperature, and Laser Unit.
2. Reset Circuit
This circuit consists of IC301 (PST575E) and peripheral circuit. This circuit always watches 5V. Output
of this circuit (nRST) is set that if 5V falls below setting level (3.9V). When the 5V rises above voltage,
the reset signal is canceled after a delay of approximately 20 ms. After cancelling, software is started
by CPU.
Edition 1.0
1
R24
IC2
3 2
PST575E
C20
4
pLPRST
Vdd
5V
3.9V
td
Reset Signal Timing Chart
R26
R3
C1
Q1
Reset Circuit
td
20
DP-1510P/1810P
IC1
CPU
td=20ms
/1810F/2010E
JUL 2002