FIC a440 服务手册

 

Troubleshooting and Repair 

 

6-26 

FIC A440 Series Service Manual 

6.4.22  Cover Switch Function Check 

22

Check BIOS Setup

Setup Cover Switch

Check Switch

Press Cover Switch

Check U26, Pin12,

L1D## = 0V

END

NO

YES

NO

YES

 

6.4.23  Internal Modem or LAN Port Check 

23

Check Fax/Modem or

LAN Module Board

Replace Module Board

Check +5V Power

Check CN24,

Pin19,31,89,1,40,88,28,24 = 3V

Pin 97,123,18 = 5V, Pin 112 =

12V

Check AD0~AD31

signal

Check U25 Signal

END

NO

YES

NO

NO

YES

YES