Circuit Description And Overall Block Diagram; Circuit Description - Sony PFV-SP3300 Maintenance Manual

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Section 4

Circuit Description and Overall Block Diagram

4-1. Circuit Description

(IF-828 board)
The IF-828 board mounts two circuit blocks so that it can
correspond to the two reference signals (A and B).
The reference black burst signal is input to the sync
separator IC (IC102 or IC202), then the H-sync signal is
extracted by IC102 or IC202. After that, the existence of
the signal is detected by IC103 or IC203. The detected
signal is processed by PLD (IC401). The signal buffered
by IC101 is terminated by the MB-915 board and
distributed to each optional board.
A REMOTE (S-BUS) signal passes through the board and
is distributed to each optional board via the MB-915 board.
PLD (IC401) receives the overcurrent (IC403) status of
power units (A and B), a fan, and optional boards,
processes it, and outputs it to the STATUS OUT
connector.
4-1 4-1
PFV-SP3300