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23. LAN problem
J3,J4,F2,F3,F4,F5,J7,R187,
R188,R192,R193,U21,C212,
C206,R189,R194,R178,R179
24. USB1 problem
USB1
J3 1pin = 5V?
Y
USB_OC#0
3.3V?
Y
USBPD0+,USBPD0- OK?
N
Check
U510,R557,R558,R158,
R159,C539,C540
Y
LAN Detect?
Check
AVDD = 5V?
U20,L22,OSC1,R166,R165,
R156,U18,R178,R505,R191,
R183,R181,L24
N
Check L3,C3,C4,C8,F501
N
Check R502,R503
Y
Check L7,C501,C505
LAN
N
N
Y
Check L21,C166,C163,D21
Check
USB2
J8 1pin = 5V?
Y
USB_OC#1
3.3V?
Y
USBPD1+,USBPD1- OK?
N
USB HUB problem
23/30
N
Check L523,C616
N
Check R602,R603
Y
Check L524,L43,
C617,C618
24/30
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