Hitachi 57F59A - Protection Circuit Block Diagram

82
DP65
2.22 PROTECTION CIRCUIT BLOCK DIAGRAM
BACK TO ADJUSTMENTS
Switching
Transformer
T902
AC Clock
I903
Feed Back
I906
Switching
Transformer
T901
Rectifier
+29.0V
D960
Q941:>
1.8A
D948
:>133V
Voltage Control
+
+115
I941
Protect On/Off
n
Switch
:Q980/Q981
AC Clock
60Hz
(P
)
DP6
X
Protection
C
ircuit
Block
D
i
agram
ower
Supply
A
CPlug
Switching
Control
I902
F901
：
8A
Varistor
X901:471
Rectifier D902
Line Filter
L901
Rectifier
D901
Fuse
F903:5AA
Deflection
+115V
Signal/DEF
+
SW+10.5V
Audio:
Audio
Vcc
Q
Rectifier
+115V
D945
ZD
Rectifier
+5.2V
:D949
Line Filter
L902
Temperature
Limited
Fusing
Resistor
R907
Fuse
F902:1A
1
Voltage Control
+
+5.2:
D962
RELAY
S901
AC-OVP
I905
R907 On/Off
Switch
:Q942
Switching
Control
I901
RELAY S903
Power On/off
Switch
:Q944
Feed Back
I904
Power_1
On/Off
n
E943:10
Off
uCOM
SBY+5.0V
+
Protector
E940:7
DEF. CCT
Protect
SIG CCT
Protect
CPT CCT
Protect
>AC175V
E941:7
Rectifier
+10.5V
D954
Conver/Vert.
CONV+28V
+
Protector
E944:10
Rectifier
-24V
D941
Conver CONV-24V
Protector
E945:4
Rectifier
+220V
D963
Video
+220V
Protector
E946
0.5
Protector
E947
3
D950
+115V
Rectifier
+5.6V
:I907
Signal
SW+5.6V
= GREEN LED
D
DH15/D608
DX07 DC27
LIVE
COLD
AC Input
Fuse
Protector Protector
On
Rectifier
+28V
D943
D
D