8-11
FOCUS-VR
(UPPER SIDE)
SCREEN-VR
(LOWER SIDE)
VR661
+B ADJ
+B
TP601
TP300
GND
PIN 15
OF CN902
WF18
PIN 18
OF CN902
WF19
PIN 19
OF CN902
WF20
PIN 20
OF CN902
WF21
BL3820F01012-1
Main CBA Top View
For continued protection against risk of fire,
replace only with same type 4 A, 125V fuse.
CAUTION ! :
ATTENTION :
Utiliser un fusible de rechange de m
ê
me type de 4A, 125V.
4A/125V
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.
NOTE:
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
Because a hot chassis ground is present in the power
supply circuit, an isolation transformer must be used.
Also, in order to have the ability to increase the input
slowly,when troubleshooting this type power supply
circuit, a variable isolation transformer is required.
MAIN CBA
Ref No.
Position
IC31
B-2
IC301
E-2
IC381
E-3
IC421
E-2
IC451
F-2
IC551
B-3
IC601
E-4
IC701
F-5
IC801
F-5
IC901
C-2
IC903
C-1
IC904
C-1
IC910
C-1
IC911
C-2
Q61
C-2
Q321
E-2
Q322
E-1
Q351
E-3
Q352
E-3
Q381
E-3
Q382
D-2
Q383
E-3
Q552
D-3
Q571
B-4
Q572
B-3
Q601
C-5
Q602
C-5
Q645
D-3
Q646
D-3
Q647
F-3
Q652
E-4
Q672
E-4
Q673
F-4
Q674
F-4
Q681
F-4
Q682
F-4
Q696
E-4
Q811
F-3
Q901
C-2
Q902
C-2
Q910
C-2
CN301
D-1
CN302
E-2
CN571
B-4
CN691
E-5
CN801
E-1
CN802
E-5
CN901
A-1
CN902
C-1
WH301A
D-2
WH501A
A-4
TP300
B-4
TP591
A-4
TP592
A-4
TP601
B-5
VR661
B-3
CONNECTORS
TEST POINTS
VARIABLE RESISTOR
ICS
TRANSISTORS
Содержание EWFG2705
Страница 1: ...SERVICE MANUAL 27 ANALOG DIGITAL COLOR TELEVISION EWFG2705 ...
Страница 40: ...8 9 Digital 2 3 Schematic Diagram L3821SCD2 DIGITAL 2 3 Ref No Position IC253 K 1 Q281 Q 4 IC TRANSISTOR ...
Страница 50: ...12 2 L3821PEX Packing S 7 S 5 S 1 Tape X 5 X 2 X 1 FRONT X 3 S 2 S 3 S 6 S 4 Packing tape ...
Страница 59: ...EWFG2705 L3821UB 2005 07 27 ...