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发表于 2024-3-31 18:35:24
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今天修到一片华硕B450M-DRAGON REV: 1. 0 主板，故障现象：开机跑00不显示，测全板供电发现没有CPU供电，它是由集成块ASP1106GGQW提供：测得
k1 v3 D! n" TASP1106GGQW 28脚供电：5V R. q" k' D5 }! f+ l% l: b
ASP1106GGQW 37脚 P_VRM_EN_10 开启：0V(正常3.3V)
. b# X* \9 `( `! h/ ^! e) p$ c, I" z6 n2 `, n/ g3 J9 Z
分析：ASP1106GGQW 37脚 P_VRM_EN_10 开启：0V是不正常的，跑线路画电路图它是由一个N沟场管和一个NPN三极管组成，测NPN三极管B脚1。75V不正常应为0.65V,拆下三极管测管已经损坏用一个印丝T04 三极管代换上去，OK。开机“嘀”一声进系统拷机24小时没有问题故障修复！！
$ x$ M5 W D- X附ASP1106GGQW引脚功能; [+ c9 D5 V( ]& ^: r( `6 @
1脚 P_VCORE_PWM4_10第四相CPU供电PWM输出
- V8 y/ i5 ?7 h. |. F1 ]0 A s2 P_VCORE_TONSET_10
% X. M: p6 w/ U# k" _3 P_VCORE_ISEN2P_104 {- v( g5 `! f3 o* G1 {/ i
4 P_VCORE ISEN2N_10 G5 X6 p( e* J# a' y
5 P_VCORE_ISEN1N_10
7 W( `+ b2 I2 j3 g6 P_VCORE_ISEN1P_10 ~/ D( J7 A! O! [# c# G) {
7 P_VCORE_ISEN3P_10
5 E) |5 J) X3 z$ ]( j) h4 B8 P_VCORE_ISEN3N_10
& W0 M7 n& }9 c! K7 }. i- u' j9 P_VCORE_ISEN4N_10
/ u( `2 B3 f* s( O2 Z10 P_VCORE_ISEN4P_10
/ I- F1 _: t. }8 \11 P_VCORE_FB+_10( @! [# g! ?2 w- n, p: [
12 P_VCORE_FB_10( Z" A1 L6 A( B# v/ g
13 P_VCORE_COMP_10
) d w+ H( ]2 n J2 A2 l' Y1 Z9 C' D2 Z14 P_VRM_RGND_20
. {2 `+ ~' p% T! ]# r9 @! c; D# D$ I15 P_VCORE_IMON_10
" q! t J9 {: P* A6 l q16 P_VRM_V06_20
# }1 ^. T* _! D- h; ^17 P_VDDNB_IMONA_100 a/ ?5 e7 [# {* B" R1 F9 t
18 P_VDDIO6 S% P3 t6 }" v, a
19 P_VCORE_SVIDOK
/ B( h [% D0 C1 l% |20 H_SVC
; @( D. k/ R5 M8 O. p21 H_SVD( W7 Q9 k- {4 L; I
22 H_SVT/ b, t. I3 z# D8 B; }+ Z
23 P_VCORE_OFS_10$ s1 p& I, \- b/ |7 J8 d1 z7 T3 S
24 P_VDDNB_OFSA_10
4 r3 `3 p8 D7 K+ @& j3 d9 k, e25 P_VRM_SET1_107 ^4 L6 R# ? v2 B0 u' C& F( m2 T
26 P_VRM_SET2_102 ~; q1 U0 D; o9 O& Y; t- y5 f8 A1 E
27 P_PROCHOT. A$ S5 ]8 q# d3 \) [3 s
28 P_VRM_VCC_20 蕊片供电- ~, m1 A% B5 O# M. c. y
29 P_VRM_IBIAS_10
$ ]* Y; p0 m- \' ]) ~0 U( y* E30 P_VDDNB_COMPA_10
/ D3 D& b: m6 S( r ` W2 k b31 P_VDDNB_FBA_10
`- T3 J( V% T& ?3 J- S! i32 P_VDDNB_FB+_10) [2 {- Q) a" Y# p
33 P_VDDNB_ISENA2P_10
/ O' Z* y5 g6 O; e34 PVDDNB ISENA2N 10
& g- U" {% a* ]7 g: I+ Q3 y35 P_VDDNB_ISENA1N_10
1 I' I" w1 u J2 C! h' K& D36 P_VDDNB_ISENA1P_10
" v0 W4 a; u* f" M+ {3 I37 P_VRM_EN_10 开启
- o5 q; b$ ^9 r7 v! Z' u2 D38 P_VDDNB_PWRGD_10& B6 |% C8 J8 X4 G9 ^0 R
39 P_VCORE_PWRGD_10& B2 G( O0 r: s+ k+ i
40 P_VDDNB_TONSET_10
: Q& \$ o. y) L W$ x. P41 P_VDDNB_PWM2_10+ f* \. g" _/ N4 c/ |( G
42 P_VDDNB_PWM1_10
, Z" _- W! u0 v. @, z43 P_THERMTRIP_4" f- ]% j6 y+ l
44 P_VRM_SMB_DATA6 Y( x1 q& q7 @- i! s$ |+ p- {
45 P_VRM_SMB_CLK6 `5 ~& [, P& P& e0 g0 c
46 P_VRM_DVD_101 U1 v0 ^' w/ v
47 P_VRM_TSEN2_10频率检测2. U/ |* T/ g% g/ b5 r3 I
48 P_VRM_TSEN1_10频率检测1
/ f- l: b8 p [' F3 P49 P_VRM_QR_IND
( d/ y, {" p6 d1 [$ R" N" t50 P_VCORE_PWM1_10第一相CPU供电PWM输出
& n# m6 F5 R) l3 z9 d51 P_VCORE_PWM2_10第二相CPU供电PWM输出
j$ I) [, m# W9 R. X9 D- U* S6 A52 P_VCORE_PWM3_10 第三相CPU供电PWM输出
% m( M; ?# G, B }) r/ q/ N53脚 DGND! Q1 V4 q N+ K5 S" Z+ p0 a5 e
54 DGND地
4 s' R# F& ~# y e9 W! r55 DGND" f, D% R! d" G; C! m
56 DGND
8 H: h3 D1 @0 z5 ]0 x* z57脚 DGND
0 W1 m6 C6 r2 p/ g, t3 T; r+ d' i* {- H, @0 G
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