Alpine PKG-2000P, Руководство по обслуживанию

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Description and Voltage of IC Terminal
Test Condition: V
B+
=12V ; V
ACC
= 12V ; T=25 ć ; DVD Source ;
MainBoard
Step-Down Converter AP1520 (U1)
Pin No. Name Type Function Description Voltage(V)
1 FB In Feedback pin 0.82
2 EN In Power-off pin (H: Normal operation; L:
Operation stopped) 10.8
3 OCSE
T
In Add an external resistor to set max output
current. 10.9
4 Vcc PI IC power supply pin 11.2
5 Output Out 8.81
6 Output Out
Output (Switch Pin.Connect external
inductor/diode here.Minimize trace area at
this pin to reduce EMI)
8.81
7 Vss Gnd GND pin 0
8 Vss Gnd GND pin 0
Power Regulator LM1117-3.3V (U2)
Pin No. Function Voltage(V)
1 ADJ/GND 0
2 Output 3.28
3 Input 9.53
Power Regulator L78M05 (U3)
Pin No. Function Voltage(V)
1 Input 8.62
2 Output 5.04
3 Gnd 0
Power Regulator L78M05 (U5)
Pin No. Function Voltage(V)
1 Input 6.89
2 Output 5.04
3 Gnd 0
Step-Down Voltage Regulator LM2576-ADJ (U4)
Pin No. Function Voltage(V)
1 Vin 11.08
2 Output 6.94
3 Gnd 0
4 Feedback 1.22
5 /On / Off 0.06/4.96
Power Regulator LM1117-1.8V(U6)
Pin No. Function Voltage(V)
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