Panasonic VL-SV74BX Service Manual page 14

4.2.1.3 Power Board
4.2.1.3.1 Power Supply Part
Power control IC (IC1)
Input voltage: AC 220V~240V
Output voltage: DC 23V, DC 12V
Package: 8pin DIP
Outline of Operation: It generate from AC 220V~240V to DC 23V, DC 12V.
4.2.1.4 KEY Board
4.2.1.4.1 Key Part
Regulator for Power 3.3V (IC1001)
Input voltage: +5V
Output voltage: +3.3V
Package: 5pin SOT-89-5
Outline of Operation: It generate from +5V to +3.3V.
Touch Button Controller(IC1002)
Operating Power Supply: +3.3V
Package: 28pin MLPQ-UT28
Outline of Operation: Detect capacitance change caused by touching button.
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