119
80
8050QMA
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 t he 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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