MiTAC 7521 PLUS/N User Manual

120

An error message is shown when reading data from CD-ROM drive.

Replace faulty
parts then end.

CD-ROM DRIVE TEST ERROR

1. Try another known good transfer board.
2. Try another known good compact disk.
3. Check if CD-ROM is  installed 

properly( 

J512 

).

Test

OK?

Try another known good 
CD-ROM drive.

Test

OK?

Replace M/B or
into board-level

Troubleshooting.

Correct it 
then end.

Board-level

Troubleshooting for

CD-ROM drive test error.

Check the following parts for cold solder or one of the following 
parts on the mother-board may be defective, use an oscilloscope
to check the following signal or replace the parts one at a time and 
test after each replacement.

Parts:

U24, Q508
RP50, RP51
RP52, RP58
R193, R106
C672, C669
J512 

Signals:

SDD[0~15]
SDDACK#
SDIOR#
SDIOW#
SDDREQ
SDCS[1,3]#
SDA[0:2]
SIDEACTS#
SIDE_ PU

RDDS[0~15]
RSDDACK#
RSDIOR#
RSDIOW#
RCS[1,3]S#
RDAS[0~2]
CD_RST#
RST_CDROM

YES

NO

YES

NO