4. Power on problem
5. Power line problem
H8_VDDA = 5V?
Power ON problem
N
4/30
Check SW1,R504,C505
Y
U10 2pin = LOW?
Check
X1,R115,C151,C155
Check
SW501,R571,C76,U10
Check
U501,U512,D17,C161
Power line problem
Y
Y
Y
N
N
N
Power line problem
5/30
Y
N
VTT problem
+3V = 3.3V?
Y
N
3.3V/5V/12V problem
Y
N
VCC_CORE problem
System problem
VTT = 1.5V?
or
VCC_CORE 1.35V?
VCC_CORE 1.6V?
MCU clock OK?
(U16 2,3pin)
U16 7pin becomes
low by Power SW
Содержание PC-AX40
Страница 51: ...PARTS LAYOUT 1 M B COMPONENT SIDE ...
Страница 52: ...SOLDER SIDE 2 M B ...
Страница 53: ...COMPONENT SIDE 3 DD ...
Страница 54: ...SOLDER SIDE 4 DD ...