7-9
Commute and filter output circuit:
When PIN 8 of IC901 sends a high pulse, current passes through Q903 and produces a current in the primary
coil of T901 (pin 1 +, pin 3 -). This produces a reverse electromotive force (EMF) in the secondary coil.
Energy is stored in the secondary coil because D910, and D912 are closed. When PIN 8 of IC901 sends a low
pulse, Q903 is closed.
When the primary coil produces a reverse current EMF, the secondary coil will produce a reverse EMF. At that
time D910, D911 conducts with a voltage output of 12V is filtered through C922, C923. The RC circuit R920,
C920 will absorb the surge voltage produced by D910, and R921 and C921 will absorb the surge voltage
produced by D911.
Содержание AccuSync LCD72VM
Страница 4: ...AccuSync TM LCD52VM LCD72VM LCD92VM ...
Страница 28: ...AccuSync LCD52VM AccuSync LCD72VM AccuSync LCD92VM User s Manual ...
Страница 122: ...7 7 ...
Страница 128: ...7 13 ...
Страница 150: ...9 4 4 AUDIO BOARD BLOCK DIAGRAM MODEL LCD72VM Line In L R Audio Out L R Speaker Audio Amplifier ST TDA7496L 12V ...
Страница 151: ...10 1 SCHEMATIC DIAGRAM TABLE OF CONTENTS Page MAIN BOARD 10 2 AUDIO BOARD 10 7 KEYPAD BOARD 10 8 POWER BOARD 10 9 ...
Страница 164: ...12 1 Revision Revision New Issue 1st Edition 2004 10 20 REVISION HISTORY ...