Hitachi 50VS69A Service Manual page 54

AC Plug
AC Input
Fuse
F90 1 8 A
Varistor
X 90 1:471
Line Filter
L901
Line Filter
L902
Temperature
Limited
Fusing
Resistor
R900:
Fuse
F902 6A
Rectifier
D901
To Lamp Ballast
TABLE OF CONTENTS
POWER SUPPLY BLOCK DIAGRAM
LC6X Protection Circuit Block Diagram (Power Supply)
LIVE COLD
Fuse
Switching
F 90 2 1 A
Transformer
T901
Rectifier
Switching
D903
Feed Back Voltage Control
Control
I904 +5.3 V: D962
I901
Switching
Fuse
Transformer
F903 4A
T902
Switching
Feed Back
Control
I906
I902
Rectifier AC OVP
> AC175V
D902 I905
RELAY
S901
RELAY
S902
RELAY
S903
AC Clock
I903
AC Clock
60Hz
Rectifier
+5.3V: D935
Rectifier
+13.5V: D952
Rectifier
+16 V: D953
Rectifier
+10V: D954
Rectifier
Protector
+5.6V: D955
E942 10
Voltage Control
+5.6V: I951
Power On/Off
Switch :Q951
Power O n /O ff
Switch :Q952
Protect On/Off
Switch Q954/Q95
Power O n /O ff
Switch :Q953
Power off Power_1 Power_3
On/Off On/Off
On On
Off Off
(POD) (TV)
53
Power P.W.B.
Regulator
+3.3 V: I972
D973:> 12.3V
ZD
Q956:> 6.5V
Q
Shunt
Protector
Over Voltage
Detector
DRIVE FAN
FAN_ TEMP_
Circuit Voltage
ALARM ALARM
Protect Protect
LC67
Signal
SBY+5.3V
uCOM
SBY+3.3V
Audio:
+13.5V
Drive:
SiG+16V
Signal/Drive:
SiG+10V
Signal/Drive:
SiG+5.6V
DOOR_
ALARM