Symphonic ST423E Service Manual page 29

Main 1/4 Schematic Diagram
A4
A3
A2
A1
B4
C4
B3
C3
B2 C2
B1 C1
7-3
VIDEO SIGNAL
D4 E4
D3 E3
D2 E2
D1 E1
F4
MAIN 1/4
Ref No. Position
ICS
IC111 C-2
A-3
IC151
TRANSISTORS
Q111 D-1
Q321 E-2
Q361 D-4
F3
F2
F1
7-4 L6552SCM1