Hitachi 51SWX20B Service Manual page 115

DP-2X SIGNAL POWER SUPPLY (Low Voltage) SHUT-DOWN CIRCUIT
D904 R906
R907
C911
16.3V
Power IC
AC
Q901
Monitors
SW +5V
SW +3.3V
SW +2.5V
and
Stby +3.3V
for Short
To R298
Monitors IP81
To RP53
Monitors IP52
and IP53
Sby +5V
S-905
SW +35V
S901
Supply
Relay
Relay
AC
To Hi Volt
Power
Supply
Q907
R960
D954
R959
HZS11B1
D933
Protect _Def 6
4 from Deflection
PPD3
See Deflection Shut
Down Circuits
16.97V
Vin
3
I901
R919
47 Ohm
C919
R920
R922
Q902
C920
R921
PPS3
R982
Protect _Sby
10
3.3V Reg
D961
Protect _Sw
11
+5V Reg
R980
SW +35V 8
D946
See Relay Control
Diagram for all
Q908
Relay Controls
R962
1K
R962
C957
C987
Q904
Q903
R940
C944
R938
T901
D905
8
R913
D907
9
I905
4 1
3 2
D962
HZS3C1
D963
HZS4A1
D960
R967
D957
R966
SW +35V
R969
C956
R963 D956
220
PPS3
4 Power _1
R939 On
10K
See additional
Power Supply Shut
Down Circuits
A
115
D941
Control +6V
10
C955
11
D952
R956
Q910
C969 R964
Q911
D955 R965
C970
SW +6V
Q912
R968
C971
+6V
S-903 SW +6V
Supply Relay
Off
I909
2
Sby +5V
DP27 DP27D