Durabrand DWT1905 Service Manual page 7

Main CBA Top View
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.
FOCUS-VR
(UPPER SIDE)
SCREEN-VR
(LOWER SIDE)
TP300
GND
VR661
+B ADJ
CAUTION ! :
4A/125V
ATTENTION : Utiliser un fusible de rechange de même type de 4A, 125V.
NOTE:
TP601
The voltage for parts in hot circuit is measured using
+B
hot GND as a common terminal.
For continued protection against risk of fire,
replace only with same type 4 A, 125V fuse.
3-4
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.
ICS
IC31
IC111
IC151
IC551
IC601
IC801
TRANSISTORS
Q31
Q111
Q321
Q571
Q572
Q601
Q602
Q662
Q671
Q675
Q676
Q681
Q682
Q683
CONNECTORS
CN571
CN691
CN801
WH301A
WH501A
TEST POINTS
TP300
TP601
VARIABLE RESISTOR
VR661
BL2300F01011-1
Position
B-1
D-1
E-2
B-2
C-4
E-1
C-1
E-2
C-1
B-3
B-2
B-4
B-4
C-3
C-3
C-2
C-2
D-3
D-3
D-3
A-3
C-4
D-1
C-2
A-2
A-3
A-4
A-1