Epson Perfection 3200 Photo Service Manual page 25

EPSON Perfection 3200 Photo
F u l l W a v e
R e c t i f i e r C i r c u i t
F i l t e r C i r c u i t
A C V o l t g e I n p u t
Operating Principles
S w i t c h i n g
S m o o t h i n g
C i r c u i t
C i r c u i t
Figure 2-5. Power Supply Circuit Block Diagram
Power Supply Circuit
+ 1 2 V D C
R e g u l a t o r I C
+ 5 V D C
S m o o t h i n g
R e g u l a t o r
C i r c u i t
C i r c u i t
O v e r C u r r e n t
P r o t e c t i o n
C i r c u i t
S m o o t h i n g
C i r c u i t
+ 2 4 V D C
C o n t r o l C i r c u i t
+ 2 4 V D C O v e r
C u r r e n t P r o t e c -
t i o n C i r c u i t
+ 5 / + 1 2 / + 2 4 V D C
O v e r V o l t a g e
P r o t e c t i o n C i r c u i t
P o w e r S u p p l y
S W C i r c u i t
Revision A
+ 1 2 V D C
+ 5 V D C
+ 2 4 V D C
P o w e r S W
( P W - S W )
20