FIC a440 服务手册
Troubleshooting and Repair
FIC A440 Series Service Manual
6-15
6.4.2 Starting
Check
+5Vs = 5V
+3Vs = 3.3V
Check Q61, Pin3 =
12V, Q43 Pin 7 = 5V,
Check DC-DC
Check CPU10
Check Vcore7
Check Vcore7
Check U34 &
Max1710
END
NO
YES
NO
YES
Check AHCLK
Check U24, Pin45
YES
Check DSC P4
Check U20, PIN 2
NO
NO
YES
START
Figure 6-1
Starting Check
6.4.3 Memory Interface Check
Check Memory Vcc =
3.3V
Check DC-DC Board
Check RAS
(0~3),CAS (0~7)
Check SKT1, SKT2
Check MA(0~13)
Check RP20, RP21
END
NO
NO
NO
YES
YES
START
Check MD(0~63)
Check SKT1 & SKT2
(0~63)
NO
YES
YES
Figure 6-2
Memory Interface Check