Hitachi P50H401 Service Manual page 62

POWER SYSTEM BLOCK DIAGRAM
AC120V
Filter PWB
AC
SW
+12V
Reg.
Digital
Audio Amp.
+5V +3.3V
Reg. Reg.
Audio
ADC
+3.3V +3.3V
Reg. Reg.
Cable Key
Equalizer ROM
AV-Control
Terminal PWB
IR-receiver I C
2
LED Buffer
LED PWB
Power Supply Unit
+16V
+12V +10.5V +5.6V
+3.3V +9V
Reg. Reg.
Audio Audio Audio
DSP PWM DAC
+5V
+3.3V +1.0V
Reg.
Reg. DC-DC
+1.8V
+9V
Reg.
Reg.
Bus
Demodulator LPF
SW
+5V +5V
Reg. Reg.
AGC
+30V +5V I C
2
Reg. Reg. Level shift
Tuner
+3.3V
Reg.
Control PWB
Clock SD
Buffer MMC
SD PWB
Vs
Va
Vcc
Vpr2
STBY+5V
+1.3V +1.8V
DC-DC DC-DC
+2.5V +1.3V
Reg. Reg.
Seine2-D
Seine2-D
DDR2
+3.0V
Reg.
+9V +2.5V
Reg. Reg.
Buffer VCXO PLL
+9V
Reg.
AV SW
Buffer
OPT
Output
Vari.
Reg.
Buffer FAN
61
DW3U
PDP Panel Module
Main-Digital PWB
+3.3V +3.3V Sub +3.3V
DC-DC Reg. MICRO Reg.
Bus
+2.5V
SW
Reg.
+1.5V
Reg.
Seine2-A
Flash Memory PLD
(OneNand) (Nereid)