|
好久不来,变化巨大啊,发个贴先!6 ]; ^' q, ]* S; q
5 V- P/ {. r* n8 m
1、标志不当:# f- ~6 i f" [& E8 c5 t
0 Q: Q! r' H" ?9 \1 N5 p4 U% ] a.fuse marking: o2 Y, \' G" D' j- W* L
: V1 D4 d! s9 y
b.power switch symbol
. T$ ]# w; _3 ~/ _, b8 c" @4 ?; |
+ z" A ?* X8 _" \1 P c.protective earth symbol
4 `9 c7 e' C( A2 C2 s* {: H: r8 ~; P! r% s
d.PE wire color2 k6 F9 k- R" c& {& b
4 [' X* W, @$ F$ y6 B2.安全说明:
3 S5 l3 i+ B. B; `3 W. G' S9 F* Q2 ?- O1 M! t( v! d& i/ }/ \+ M1 |
a.Motltipower supply system
. Z$ U# G# U7 d! i6 u
" N2 F8 |# h2 _2 N5 m( t" | b.protective earth connection instruction* c/ u2 U' M, C2 \1 |" p* M: I+ f
0 k$ g" p; W! D% k c.High touch current warning label; ]$ Z; \4 I$ u$ A6 P" X
% n- i* ~' K; c& l( b" ~
d.Hazardous voltage
: X2 A3 J$ _/ p3 I4 Z0 T/ w. B, |0 X# }# ]# M# ]+ S6 k) A
3.绝缘距离:
0 E9 P' V6 K3 ]% N4 C3 Y' W# H6 u! D) I7 U* }9 F7 a
a.10N force requirement for all parts
+ c# ~! H- i6 c8 o
4 ^' y& h% ?9 A& D0 M b.misunderstand bulk capacitor's insulation specifications
! y4 l/ _' G x" W
1 j0 i5 E# }5 ^% U5 z c.Ill assembly
O5 {0 `$ r) c3 N- w7 H6 I5 R( J
$ W* p- j1 g* P2 l3 {& Z d.misunderstand fan wire's insulation feature / p& H: n R# u) b* V" P
9 E; A6 {% v1 w5 ~2 v2 |/ K e.transformer construction fail: margin tape width and turns of insulation tape; ^7 }/ {) L& k; |4 r& o
! g7 ]9 r( K9 q0 A4.资料和元器件:
" q6 \4 \, G8 @, M
6 M6 L& J$ y! [' y2 U/ K8 E a.certificate out of validity
. `8 T, X0 S" Q. H2 d& p/ `& j. Q6 k9 t" A5 u
b.misuse component certificate: UL and European standards different( ]2 v0 C- q* m/ f- ]
. v/ ?. J' x+ @
c.miss safety critical components in CDF: discharge resistors and bulk capacitor4 U3 \+ n% R, c. z/ ?
E# y+ T6 k4 Y2 C# n
d.misunderstand the requirements for safety critical components: not all safety critical components need certificate
M. o' w2 F. U4 y0 H
& J2 S/ c& q; _* M+ _7 }; L& Z9 z e.misunderstand components
$ i6 F( i2 s: E! k' m6 k( ~) d+ d8 w
5.安规测试:
$ n: k& H6 D+ i3 X4 k" D% |& p# q7 [! W% k
a.Hi-pot fail, especially after 48hours' humidity treatment, t* h: m# _0 K% q5 b
3 m& [' O/ `& K+ i Q, w% r/ ^8 Z: W
b.Touch current fail3 s, N$ O9 y6 A' ^# ] [: D; l
$ [3 Z# v4 F2 O( e c.Output overload fail: temp. exceeded safety limit* E0 x/ f$ S, T! i) ]7 u
# N' P) c0 m: h6 I# z d.Component fault simulation: temp.on transformer and output voltage exceeded safety limit5 `2 m: ], {; Y/ Z
% W1 O6 @, t [, z. v2 B2 t6.设计更改和生产一致性:5 t& ?. U' K1 t$ M3 U2 ~; ?
( r2 k0 E/ G! V4 _: C' m
a. Non-conformance between certification and production
% H; O% g4 N* i$ z& z( W0 ~
9 F: H0 ?8 r# X$ f- V2 W$ Lb. Label format
4 [: g8 A1 j$ W
0 j& w6 G2 ^/ ]+ ]7.PCB Layout图提供不对,只提供了器件装配图,没有走线图。 |
|