MiTAC 8355 service manual LAN Test Error, Symptom An error occurs when LAN device is installed

8355 N/B MAINTENANCE

8.14 LAN Test Error

Symptom: An error occurs when LAN device is installed.

+3VS_LAN

	LAN_MRXD0	RP527	LAN_MRXD0_2
P14		22*4		6	P19
	LAN_MRXD1		LAN_MRXD1 _2	5
	LAN_MRXD2		LAN_MRXD2 _2	4
	LAN_MRXD3		LAN_MRXD3 _2	3

L541

120Z/100M

	LAN_MTXD3	R686		33		LAN_MTXD3	20
	LAN_MTXD0				RP19	LAN_MTXD0	17
	LAN_MTXD1				33*4	LAN_MTXD1	18
	LAN_MTXD2					LAN_MTXD2	19
U20	LAN_MTXEN					LAN_MTXEN	16
	LAN_MRXDV					LAN_MRXDV _2
		R557	22				9	U12
	LAN_MRXER	R552				LAN_MRXER _2
South Bridge			22				11
	LAN_MRXC	R559		22		LAN_MRXC _2	10	LANPHY
VT8235
	LAN_MRXD3					LAN_MRXD3 _2	16
								VT6103
		R561		22
	LAN_MTXC	R553		22		LAN_MTXC _2	15
	LAN_DCLK	R691		33		LAN_DCLK	2
	LAN_DADAIO	R230		33		LAN_DADAIO _2	1
	LAN_COL	R554		22		LAN_COL _2	21
	LAN_CRS					LAN_CRS _2
		R555	22				22

41LAN_TX+

40LAN_TX-

33LAN_RX+

32LAN_RX-

	C860	C830
	10P	10P
R801	R784	L49	7		11	R34	0	PJTX+1
51.1	51.1		6
		90Z/100M			9	R35	0	PJTX- 2
				U502
		L51	8		16	R27	0	PJRX+3		J527
					14 R30		0	PJRX- 6
		90Z/100M	1	LF-H41S
					10			PJ4	4,5
			3		15			PJ7	7,8
	R47	R48								LAN
	51.1	51.1		RXC					Connector
				CMT

C120	R49	R45	R38	R46
	75	75	75	75
0.1U

		+3VS	+3VS
+3VS		R112	R104
			4.7K
		4.7K	LANPHY_RESET# 48
R109			3
		2	Q11
100K
		3
			DTC144WK
	2	Q12
C226		DTC144WK	1
1U		1

			R528	C112
	LAN_OSCIN_2		0	1000P
46
45	LAN_OSCOUT_2			R783	R51
				0	0
	C199	X2	C198
	27P	25MHz	27P

153