Samsung RS2521 Dokumentacja Pobierz pdf (Strona 22)

OPERATION PRINCIPLES BY PARTS OF CIRCUIT

2) DISPLAY OPERATION

Like the signal diagram below, Micom sends “ high ” signal through MICOM 6 terminals of NO #1 2  3  4

 5  6 for 2ms every 12ms. This signal goes to output terminal via input terminal of IC5 (KID65783AP or

TD62783AP). Output wave always goes through LED input terminal with DC11~12V on every period. At this

time, if SINK signal comes out at IC4, DC11~ 12V is applied to LED input terminal and output terminal sinks to

OV which turn on LED for 2ms For example, to turn on "Power Fre." LED, IC4 #16 pin sinks to 0V when IC5

#16 becomes DC 11~12V making "Power Fre" LED turn on.

 GRID WAVE PATTERN

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 72 73

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Samsung RS2521 Dokumentacja Strona 22