7521Plus / N N/B MAINTENANCE
8.5 MEMORY TEST ERROR
Either on board or extend SDRAM is failure or system hangs up.
R124 
630SDCLK
SH8 |
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U15 | SDRAMCLK[0~3] | |
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Clock Synthesizer | RP20,RP22,RP23,RP25 | |
| MDR[0~63]RP41,RP44,RP54,RP53 | |
SH3 | MAB#[0~14] |
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| DQMA#[0~7] |
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SDCLK | CS#[0~3] RP40 CSA#[0~3] | |
| SRASA#,SCASA# | R162,R154 |
| SMDATA, SMCLK | |
U24 | WEA# | R163 |
+S3V |
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SIS 630S | R588 |
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8.2K | SH3 | |
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| U508 |
| CKE | 74LVC244 |
SDRAMCLK[2~3]
CKE[2,4]
MD[0~63]
CSA#[2,3]
SDRAMCLK[0~1]
CSA#[0,1]
CKE[0,1]
ON BOARD 64MB
SDRAMSH10
U18,U22,U25,U29 U19,U23,U26,U30
J6
| SH9 |
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