Sony S75F Service Manual page 35

S75F Sony
increase through IC902, and voltage increase of C Pin of IC901, and then it cuts off the pulse output.
C Pin of IC901
2. ZD901, ZD902 can be broken down when12V and 5V DC voltage increase, which lead to
SCR901 breaks through, then 12 connected to ground and realizes over-voltage protection.
Commute and filter output circuit: When D Pin of IC901 has pulse output, which makes T901 work, while
being given a low level, and there is a current in the primary coil of T901 with a voltage up terminal
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