Onkyo TX-SR503 Service Manual page 84

IC BLOCK DIAGRAMS AND TERMINAL DESCRIPTIONS-24
Q5640: AN34060A (3 Output Voltage Regulator)
BLOCK DIAGRAM
Reference Voltage
1
3
TERMINAL DESCRIPTION
Pin No. Description
1 MODE 1
2 REG 1
3 VCC
4 GND
5 REG 2
6 VCC
7 REG 3
VCC
Pre
Drive
2 6
Function
WHEN MODE 1 pin is 5V, REG 1 output is "H".
WHEN MODE 1 pin is "H", REG 1 output is 5.0V (I
Connected to Power supply
Connected to IC substrate
WHEN MODE 1 pin is "H", REG 2 output is 3.3V (I
Connected to Power supply
WHEN MODE 1 pin is "H", REG 3 output is 2.5V (I
VCC
Pre
Pre
Drive
Drive
4
5
= 300mA min).
o1(peak)
= 200mA min).
o2(peak)
= 600mA min).
o3(peak)
TX-SR503/503E/8350
Peak Current
Protection &
Thermal Protection
Output
VCC
7