MiTAC 7521 PLUS/N service manual 133

7521Plus / N N/B MAINTENANCE

8.13 PC-CARD SOCKET FAILURE

An error occurs when a PC card device is installed.

PC CARD TEST ERROR

1.Check if the PC CARD device is installed properly.

2.Confirm Pc card driver is installed ok.

YES

Test	Correct It.
OK?
	NO

Try another known

Good PC card device.

	YES
Re-test		Change the
		faulty part
OK? NO
		then end.

Change M/B or go into board-level Troubleshooting.

Board-level

Troubleshooting for

PC CARD 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:	SOCKET A	COMMON	SOCKET B
	SIGNALS	SIGNALS	SIGNALS
U13, U505	ACD[0:15]	AD[0:31]	BCD[0:15]
U506, RP11	ACA[0:25]	C/BE[0:3]	BCA[0:25]
		PAR	BIOWR#/BIORD#
RP12, RP14	AIOWR#/AIORD#
	AINPACK#/AREG#	TRDY#	BINPACK#/BREG#
RP508, RP511		IRDY#
	ARDY/AWAIT#		BRDY/BWAIT#
C279, C280	ABVD1/ABVD2	RESET#	BBVD1/BBVD2
		SERR#
R566, R564	ARESET/AWE#		BRESET/BWE#
		PERR#
C275, C274	AVS1/AVS2		BVS1/BVS2
		STOP#
L43, L40, L38	ACE1#/ACE2#	DEVSEL#	BCE1#/BCE2#
C159, C122	A_CD#1/A_CD#2	FRAME#	B_CD#1/B_CD#2
C123, C138	AOE#/AWP	REQ0#	BOE#/BWP
		GNT0#
C147, C139
		CLKRUN#
C152, C146

133