Hitachi C47-WD8000 Service Manual page 18

TROUBLE SHOOTING
AC Plug
Fuse
F902:T1A
AC Input
Rectifier
D901
Fuse
F901:T6.3
Varistor
X901:681
Line Filter
L901 Fuse
F903:T3.15
Line Filter
Rectifier
L902
D902
Temperature
Limited
Fusing
Resistor
F904
To Deflection
Power Supply
DP5M Protection Circuit Block Daigram
COLD
LIVE
Switching
Transformer
T901
Switching
Feed Back
Control
I904
I901
>AC300V AC-OVP
I905
Switching
Transformer
T902
Switching
Feed Back
Control
I906
I902
RELAY
S901
RELAY
S903
AC Clock
I903
Voltage Control
+5.2V:D962
Protector
+38.5V:D960
E940:7
Protector
+35V:D961
E942:2
Protector
E941:5
+10.5V:D954
+5.6V:D955
Voltage Control
+5.6V:I941
Rush R On/Off
Switch:Q942
Power On/Off
Switch:Q944
Power_1
On/Off
On
Off
AC Clock
50Hz
(TV)
18
Rectifier
+5.2V:D949
Rectifier
Rectifier
D988:>14V
Rectifier
ZD
Rectifier
Protect
On/Off
Over Voltage
Detector
SIG CCT
DEF CCT
Protect Protect
Signal:
SBY+5.2V
Audio:
+38.5V
Signal:
SIG+10.5V
Signal:
SIG+5.6V
CPT CCT
Protect