Emerson Symphonic SC1304 Service Manual page 46

13" colour
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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.
NOTE :
The voltage for parts in hot circuit is measured
using hot GND as a common terminal.
1-8-13
TO SENSOR CBA
(END-SENSOR)
WF3
WF1
WF6
WF5
TP201
TP202
J271
TP402
TP301
RF-SW
CTL
B-OUT
V-ENV
V-OUT
CL602
TO SENSOR CBA
(START-SENSOR)
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.
BECAUSE A HOT CHASSIS GROUND IS PRESENT IN THE POWER
WF8
SUPPLY CIRCUIT, AN ISOLATION TRANSFORMER MUST BE USED.
TP401
TP401
ALSO, IN ORDER TO HAVE THE ABILITY TO INCREASE THE INPUT
A-OUT
SLOWLY, WHEN TROUBLESHOOTING THIS TYPE POWER SUPPLY
CIRCUIT, A VARIABLE ISOLATION TRANSFORMER IS REQUIRED.
B
C650
B
CL301
Sensor CBA Top View
BHB300F01014-A
BHB300F01014-B
MAIN CBA
Ref No.
ICS
IC001
IC201
IC202
IC301
IC401
IC551
IC601
IC602
IC801
TRANSISTORS
Q205
Q206
Q301
Q401
Q402
Q571
Q572
Q591
Q601
Q602
C613 GND
Q604
(+B Adjustment)
Q605
Q606
Q607
Q608
Q609
VR601
Q610
+B ADJ
Q611
Q612
Q613
Q871
D613 Cathode
Q872
(+B Adjustment)
Q873
Q874
Q875
CONNECTORS
CL201
CL401
CL402
CL403
CL501B
CL502B
CN571
CN601
CN801
TEST POINTS
TP201
TP202
R583
(H Adjustment)
TP301
TP302
TP401
TP402
VARIABLE RESISTOR
VR601
1-8-14
BT5500F01011
Position
D-4
A-3
B-3
B-4
C-3
D-2
E-3
D-2
A-1
A-4
B-3
A-4
B-3
B-3
D-1
C-1
C-1
E-3
E-3
E-3
D-3
D-3
D-2
D-3
C-4
C-4
C-4
D-3
D-4
C-3
D-3
C-2
C-3
C-2
C-1
C-3
C-2
C-4
D-1
D-3
D-1
D-4
B-4
B-4
C-4
C-4
B-4
D-4
C-4
E-2

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