MiTAC 8050QMA - Manual (Page 120)

119
80 80 50QMA 50QMA N/B Maintenance N/B Maintenance
8.5 Memory Test Error-1
Extend DDRAM is failure or system hangs up.
Memory Test Error
One of the following components or signals on the motherboard
may be defective ,Use an oscilloscope to check the signals or
replace the parts one at a time and test after each replacement.
Test
OK?
Correct it.
Yes
No
Parts:
U710
U7
J713
J714
R691
R692
R606
R242
C285
C604
Signals:
1. Check if on board SDRAM chips are no cold
solder.
2. Check the extend SDRAM module is installed
properly. ( J713,J714)
3. Confirm the SDRAM socket (J713,J714) is
ok,no band pins.
If your system host bus clock running at
266MHZ then make sure that SO-DIMM
module meet require of PC 266.
Test
OK?
Yes
No
+1.8V
+3VS
S[A..B]_MA[0..13]
CKE#[0..3]
CS#[0..3]
ODT[0..3]
S[A..B]_BS#[0..2]
S[A..B]_CAS#
S[A..B]_RAS#
S[A..B]_WE#
S[A..B]_DQS#[0..7]
S[A..B]_DQS[0..7]
S[A..B]_DM[0..7]
S[A..B]_DQ[0..63]
Board-level
Troubleshooting
Replace
Motherboard
Replace the faulty
DDRAM module.
SMBDATA
SMBCLK
NB_CLK _DDR[0,1,3,4]
NB_CLK _DDR[0,1,3,4]#
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