Casio UP-370 - 3 Circuitry; Power SUPPLY Circuit

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CIRCUITRY3.
POWER SUPPLY CIRCUIT3-1.
The power supply source is a DC 24 V.
AC
ADAPTOR
CPU
VCC3
ROM
RAM
U1
U2
U3. 21
U13
U14
DRIVER
DRIVER
DC 24 V
POWER SW
U18 U19
U11
VP(+24 V)
Q5
FET
VP
HVP
VCC
VCC
VCC
VCC
VP
AUTO
CUTTER
PRINTER
MOTOR
PRINTER
HEAD
BUFFER
LATCH
U7
LED DS1
VCC3
VCC3
VCC3
OTHER IC
REGULATOR REGULATOR
VCC(+5 V) VCC3 (+3.3 V)