Output Rectifying And Smoothing Circuit - NEC MultiSync FP1350 Service Manual

8-4. Output Rectifying and Smoothing Circuit

The fly-back voltages which are generated at the secondary windings of T601 are rectified by D6A1, D6E1,
D6F1, D6G2, D6H1 and D6K1. Then, these voltages are smoothed by C6A1, C6A2, C6E1, C6E2, C6F1,
C6F2, C6F3, C6G2, C6H1, C6H2, C6K1 and C6K2 so that DC voltages are obtained.
The DC voltages are maintained constantly by controlling the ON period duty cycle of TR1 (internal IC621) in
the converter circuit.
T601 D6A1
+
L6A1
C6A1
-
D6E1
+ +
L6E1
C6E1
- -
C6E3
D6F1
+
+
L6F1
-
-
C6F2
C6F1
+
D6G2
C6G2
-
+
C6H1
L6H1
-
D6H1
+
D6K1 L6K1
C6K1
-
(Fig.8-4) Output Rectifying and smoothing Circuit
+
C6A2
-
+
C6E2
-
+
C6F3
-
+
C6H2
-
+
C6K2
-
8-43
+220V
+80.2V
+14.5V
+8.5V
GND
-15.6V
F5.5V
FG