Samsung BD-P1400 Service Manual page 76

Schematic Diagrams
(d) Feedback Control Circuit
1) F/B terminal of PQIZ1 determines output duty cyle.
2) C-E (Collector-Emitter) of PQIZ1 and F/B potential of PQIZ1 are same.
7-2-3 Internal Block Diagram (Internal Block Diagram of S.M.P.S Circuit)
7-
Fig. 7-3
Fig. 7-4
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