Sylvania C6615LE Service Manual page 35

Main CBA Bottom 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.
WF10
Q704
Emitter
WF11
Q705
Emitter
WF12
Q706
Emitter
7-21
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.
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 Ref No.
ICS
IC11 C-1
IC502 B-2
IC503 B-2
IC504 B-2
IC505 B-2
IC601 A-1
IC603 A-2
IC781 D-3
IC801 C-1
IC851 C-1
IC852 C-2
TRANSISTORS
Q31 C-1
Q421 B-3
Q422 A-3
Q423 A-4
Q424 A-3
Q425 B-4
Q426 B-4
Q427 B-3
Q428 B-3
Q460 A-4
Q461 B-4
Q462 B-3
Q463 A-4 CN101A
Q464 A-4 CN102A
Q466 A-3 CN103A
Q467 B-3 CN104A
Q468 B-3 CN401
Q469 A-4 CN402
Q501 C-3 CN801
Q502 C-2 CN802
Q503 B-2
Q504 B-2 TP300
7-22
Position
TRANSISTORS
Q505 B-2
Q506 C-2
Q507 B-3
Q508 B-2
Q509 B-3
Q510 C-2
Q511 B-3
Q512 C-2
Q513 B-2
Q601 A-1
Q603 A-1
Q633 A-2
Q701 D-3
Q702 D-3
Q703 D-3
Q704 D-3
Q705 D-3
Q706 D-2
Q707 D-3
Q708 D-3
Q709 C-1
Q802 C-1
Q803 C-1
CONNECTORS
B-4
C-4
C-4
B-1
A-4
A-3
C-1
D-1
TESTPOINT
A-3
BL0200F01011-1