Emerson EWT19S3 Service Manual page 29

Main 3/4 Schematic Diagram
CAUTION !
IF SIGNAL
Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit.
VIDEO SIGNAL 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.
AUDIO SIGNAL
Otherwise it may cause some components in the power supply circuit to fail.
M4
M3
M2
M1
O4
N4
N3 O3
O2
N2
O1
N1
7-7
NOTE :
The voltage for parts in hot circuit is measured
using hot GND as a common terminal.
Q4
P4
P3
Q3
P2 Q2
P1
Q1
CAUTION: FOR CONTINUED PROTECTION AGAINST RISK
OF FIRE, REPLACE ONLY WITH SAME TYPE 4A, 125V FUSE.
ATTENTION: UTILISER UN FUSIBLE DE RECHANGE DE
4A/125V
MÊME TYPE DE 4A, 125V.
MAIN 3/4
Ref No.
R4
IC31
IC601
TRANSISTORS
Q31
Q601
Q602
Q662
Q671
Q675
Q676
Q681
R3
Q682
Q683
Q696
CONNECTOR
CN691
VARIABLE RESISTOR
VR661
R2
* 1 NOTE:
The Capacitor ( C643 ) is either type A or type B.
These two types are exchangeable and can be
R1
equally used whichever the model is . The difference
between type A and type B is shown in the table below.
C643 C642
Type A 0.01/250V
0.01/250V
Type B Not Used
4700P/250V
7-8
Position
ICS
P-3
O-1
P-4
P-2
P-1
O-1
N-2
N-1
N-1
M-2
M-1
M-1
O-2
Q-2
O-1
JS642
Not Used
WIRE
L6406SCM3