MiTAC 7521 PLUS/N - Page 116

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7521
7521
Plus / N N/B MAINTENANCE
Plus / N N/B MAINTENANCE
8.5 MEMORY TEST ERROR
Either on board or extend SDRAM is failure or system hangs up.
SH8
SMDATA, SMCLK
MDR[0~63]
MAB#[0~14]
DQMA#[0~7]
CS#[0~3]
SRASA#,SCASA#
CSA#[2,3]
CSA#[0,1]
U508
74LVC244
CKE
R588
8.2K
+S3V
CKE[0,1]
CKE[2,4]
ON BOARD 64MB
SDRAM
U18,U22,U25,U29 U19,U23,U26,U30
J6
RP20,RP22,RP23,RP25
RP41,RP44,RP54,RP53
CSA#[0~3]
RP40
WEA#
R162,R154
R163
SH3
MD[0~63]
SDRAMCLK[2~3]
SDRAMCLK[0~1]
SH9
SH10
U15
ICS9248-102
Clock Synthesizer
SDRAMCLK[0~3]
R124
630SDCLK
SH3
SDCLK
U24
SIS 630S
144 PIN SO-DIMM