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USB driver
ASIC
IC401
OE, RCV, VP, VM
Suspend, VMO
VPO
Noise filter
circuit
Overcurrent
protection circuit
D+
D -
Rush current
prevention circuit
Inverter circuit
Rectifying/
(Flyback converter system)
smoothing
circuit
Control
circuit
ASIC
USB
connector
Rectifying/
smoothing circuit
Rectifying/
smoothing circuit
Rectifying/
smoothing circuit
Constant-voltage
detection circuit
IEEE1284
driver
IC403
(Semiconductor switch)
+12V regulator IC
(with ON/OFF function)
(Semiconductor switch)
+3.3V
regulator IC
Centronics
connector
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