标题: 联想B470 [打印本页] 作者: yangxigao 时间: 2014-11-2 17:56 标题: 联想B470 我修了个本是联想B470，送修故障为进系统重起，拆机后查到CPU供电上管烧了，换上后还是一样的故障，经测量VCC_GFXCORE电压为0.45V.请问正常吗？当测到其供电心片NCP5911MNTBG-GP 的EN脚时立马重起，不知何原因，请各位帮解一下VREG_SWA_LG
VREG_SWA
VREG_GFX_BOOT_1
VREG_SWA_HG VREG_GFX_BOOT
VREG_GFX_EN
V_PWR
_PWMA
_DRON 1 2
PR4402 Do Not Stuff PR4402 Do Not Stuff
BST 1
PWM 2
EN 3
VCC 4 DRVL 5
GND 6
SW 7
DRVH 8
FLAG 9
PU4405
NCP5911MNTBG-GP
PU4405
NCP5911MNTBG-GP
1 2
PC4405
SC1U10V2KX-1GP
PC4405
SC1U10V2KX-1GP
1 2
PR4401
2D2R3-1-U-GP
PR4401
2D2R3-1-U-GP
2
1
PC4404
SCD22U25V3KX-GP
2
1
PC4404
SCD22U25V3KX-GP
TP44
Do N
TP44
Do NVREG_SWA_LG
VREG_SWA
SWA_LG
VREG_SWA_HG SWA_HG
DCBATOUT_VCC_GFXCORE
VCC_GFXCORE
SB_0902
SB_0902
SB_0903
1
2 3
4
5
6
S
G D
D
D
D
PU4401
IRF6721SPBF-GP-U
84.06721.030
S
G D
D
D
D
PU4401
IRF6721SPBF-GP-U
84.06721.030
1 TP4401
Do Not Stuff
TP4401
Do Not Stuff
1 2
PL4401
L-D36UH-1-GP
PL4401
L-D36UH-1-GP
1 2 PTC4402
ST330U2VDM-4-GP
PTC4402
ST330U2VDM-4-GP
1 2 PR4403
Do Not Stuff
PR4403
Do Not Stuff
1 2
PC4402 SC10U25V5KX-GP PC4402 SC10U25V5KX-GP
1 2
PC4401 SC10U25V5KX-GP
PC4401 SC10U25V5KX-GP
1 TP4403
Do Not Stuff
TP4403
Do Not Stuff
1 2 PTC4403
ST330U2VDM-4-GP
PTC4403
ST330U2VDM-4-GP
1 2
PG4407
Do Not Stuff
PG4407
Do Not Stuff
1 2
PG4408
Do Not Stuff
PG4408
Do Not Stuff
1 2
RC4402
Do Not Stuff
DY
RC4402
Do Not Stuff
DY
1 2
PC4403 SC10U25V5KX-GP PC4403 SC10U25V5KX-GP
1 2 PR4404
Do Not Stuff
PR4404
Do Not Stuff
1
2 3
4
5
6
7
S
S
G D
D
D
D
PU4403
IRF6725MTRPBF-GP-U
84.06725.030
S
S
G D
D
D
D
PU4403
IRF6725MTRPBF-GP-U
84.06725.030
PC4404 PC4404
1 2
RC4401
Do Not Stuff
DY
RC4401
Do Not Stuff
DY
1 TP4402
Do Not Stuff
TP4402
Do Not Stuff作者: q1075023958 时间: 2014-11-2 18:03
额 下面的这些是什么东东作者: 唐/footb宇 时间: 2014-11-2 18:29
没有搞明白什么意思作者: 皇痴筿福 时间: 2014-11-2 18:45
楼主发的什么情况？？？作者: wx0408 时间: 2014-11-2 19:22
图纸上复制的？？？？作者: 维小本 时间: 2014-11-2 20:17
下面是什么东东 附上图纸不就好了吗作者: 小松011 时间: 2014-11-2 20:53
不错，辛苦了，谢谢分享！作者: windlovetao 时间: 2014-11-2 20:54
楼主这是要干什么的
