MiTAC 7521 PLUS/N service manual 120

7521Plus / N N/B MAINTENANCE

8.7 CD-ROM DRIVE TEST ERROR

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

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 ).

Board-level

Troubleshooting for

CD-ROM drive test error.

YES

Test

OK?

NO

Try another known good CD-ROM drive.

YES

Test

OK?

NO

Replace M/B or into board-level Troubleshooting.

Correct it then end.

Replace faulty parts then end.

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:	Signals:
U24, Q508	SDD[0~15]	RDDS[0~15]
RP50, RP51	SDDACK#	RSDDACK#
RP52, RP58	SDIOR#	RSDIOR#
R193, R106	SDIOW#	RSDIOW#
C672, C669	SDDREQ	RCS[1,3]S#
J512	SDCS[1,3]#	RDAS[0~2]
	SDA[0:2]	CD_RST#
	SIDEACTS#	RST_CDROM
	SIDE_ PU

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