Mitac 8080 Service Manual - laptop schematics, notebook ...
Mitac 8080 Service Manual - laptop schematics, notebook ...
Mitac 8080 Service Manual - laptop schematics, notebook ...
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8.5 Memory Test Error<br />
Extend DDRAM is failure or system hangs up.<br />
Memory Test Error<br />
1.If your system installed with expansion<br />
SO-DIMM module then check them for<br />
proper installation.<br />
2.Make sure that your SO-DIMM sockets<br />
are OK.<br />
3.Then try another known good SO-DIMM<br />
modules.<br />
Test<br />
OK?<br />
No<br />
Yes<br />
If your system host bus clock running at<br />
266MHZ then make sure that SO-DIMM<br />
module meet require of PC 266.<br />
Test<br />
OK?<br />
No<br />
Yes<br />
<strong>8080</strong> N/B Maintenance<br />
Replace the faulty<br />
DDRAM module.<br />
Replace the faulty<br />
DDRAM module.<br />
Board-level<br />
Troubleshooting<br />
Replace<br />
Motherboard<br />
One of the following components or signals on the motherboard<br />
may be defective ,Use an oscilloscope to check the signals or<br />
replace the parts one at A time and test after each replacement.<br />
Parts:<br />
RP11<br />
RP13<br />
RP15<br />
RP17<br />
RP20<br />
RP22<br />
RP25<br />
RP28<br />
RP31<br />
RP33<br />
RP34<br />
RP37<br />
PR40<br />
R216<br />
R225<br />
Q515<br />
Q516<br />
R138<br />
R130<br />
R108<br />
U502<br />
U3<br />
U4<br />
J513<br />
J514<br />
Signals:<br />
+1.25V_DDR<br />
+2.5V_DDR<br />
CKE [0:3],<br />
CS# [0:3]<br />
SMA [1,2,4,5]<br />
SMAB [1,2,4,5]<br />
NB_MA [0,3,6:12]<br />
NB_MD [0:63]<br />
NB_DQS [0:7],<br />
NB_BA [0,1]<br />
NB_CB [0:7],<br />
NB_DM [0:8]<br />
NB_RAS#<br />
NB_CAS#<br />
NB_WE#<br />
SMB_DATA<br />
SMB_CLK<br />
HCLK_MCH<br />
HCLK_MCH#<br />
66M_MCH<br />
CLK_DDR [0:5]<br />
CLK_DDR [0:5]#<br />
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