8-6
Power Supply Block Diagram
A7121BLP
4A/125V
F601
4A/125V
LINE
FILTER
L601
AC601
AC CORD
BRIDGE
RECTIFIER
D605 - D608
HOT COLD
T601
12
15
16
14
10
4
4
3
1
2
IC601
ERROR
VOLTAGE DET
Q601
Q603
SWITCHING
CONTROL
SWITCHING
MAIN CBA
2
6
7
+12V
P-ON-H
BACKLIGHT-SW
HOT CIRCUIT. BE CAREFUL.
CN1202
11
13
INV+22V
+35V
TO SYSTEM
CONTROL
BLOCK
DIAGRAM
TO LCD
BACKLIGHT
BLOCK
DIAGRAM
Q913
FEED
BACK
IC904
+1.8V REG.
IC905
+5V REG.
Q402 Q403
VT+33V
P-ON+5V(1)
P-ON+9V
TO
LCD
MODULE
TO SYSTEM
CONTROL
BLOCK
DIAGRAM
D923
SHUNT
REG.
SWITCHING
Q916
D924
SHUNT
REG.
DTV-ON-H
AL+3.3V(D)
AL+3.3V(A)
AL+1.2V(D)
IC906
+3.3V REG.
Q902
SW+3.3V
D920
SHUNT
REG.
IC901
+1.2V REG.
Q901
SW+3.3V
D916
SHUNT
REG.
Q923
SW+12V
Q905
SW+6.5V
9
1~9
PANEL+3.3V 17~25
1~2
PANEL+3.3V
CN1411CN1402
LVDS CBA
UNIT
Q908
SW+3.3V
Q909
SW+2.5V
Q918
SW+9V
Q907
SW+5V
Q903
SW+5V
SWITCHING
Q906
SWITCHINGSWITCHING
CN102
DTV-ON+3.3V44
CN62
DTV-ON+2.5V55
DTV-ON+1.8V66
DTV-ON+3.3V
DTV-ON+1.8V
DTV-ON+2.5V
CN101
DTV-ON+5V33
CN61
DTV-ON+5V
DTV MODULE
CBA UNIT
SWITCHING
Q925
Q924
SW+5V
CAUTION !
Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit.
If Main Fuse (F601) is blown , check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
For continued protection against risk of fire,
replace only with same type 4 A, 125V fuse.
CAUTION ! :
ATTENTION : Utiliser un fusible de rechange de même type de 4A, 125V.
4A/125V
NOTE:
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
NOTE: CBA AND PWB MEANS PRINTED WIRING BOARD.
To Next Page
Loading...
Need help?
General