Sony PFV-SP3300 Podręcznik konserwacji - Strona 25

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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

PFV-SP3300