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好久不来，变化巨大啊，发个贴先！ v& G4 I2 h& A5 @1 ]
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1、标志不当：7 b- ]. F/ Z* ]* N5 t; |
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a.fuse marking
* ?* w/ Z% \$ ~3 T6 N- }' S: u6 m" U6 ~6 z! a* ~
b.power switch symbol& N+ p( ^' a# H$ I
$ K% x4 _% `) E- \# R c.protective earth symbol( [; a( G; t a% f" l& l+ t
* ]) J; f: Q' M3 l. y. {# S% H0 C
d.PE wire color6 C+ l0 P6 M# R, ?
3 V; N c$ H( z: D+ b4 L1 q2.安全说明：$ A. }6 s- H% S7 I# u( [. {+ ]. I6 B8 k
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a.Motltipower supply system% @' {7 L3 c+ x0 R) ^ l. {
& Y0 m4 m/ R2 u: L' |9 U# i1 J b.protective earth connection instruction( |1 Y, s; i1 V8 ]
# S- c- e, Q2 t8 z. t# N O
c.High touch current warning label! i( D. q4 s3 A1 L7 W- |( C. y
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d.Hazardous voltage
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3.绝缘距离：
6 S# R, F6 O' j. q, g0 j; o2 |$ _3 j/ t* K6 u( Q/ v, ]2 l8 l
a.10N force requirement for all parts
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b.misunderstand bulk capacitor's insulation specifications) v/ d& G1 O" a( H- K' \( E
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c.Ill assembly
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7 e+ i2 L1 ^& D; x# W. B) a" T" l6 R! A d.misunderstand fan wire's insulation feature ' a5 D8 D. B( b9 R
0 Z O$ U( P1 B e.transformer construction fail: margin tape width and turns of insulation tape
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5 k2 b/ h+ {6 R& r3 R" G4.资料和元器件：
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a.certificate out of validity9 f( n# {/ Z5 R1 o5 H' Q3 \/ E P
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b.misuse component certificate: UL and European standards different0 ^6 u& d$ v/ a
6 ^2 G: S# {0 V/ y: `2 T6 ~8 k
c.miss safety critical components in CDF: discharge resistors and bulk capacitor
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d.misunderstand the requirements for safety critical components: not all safety critical components need certificate
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. w( ?5 s D7 N' n5 o e.misunderstand components
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5.安规测试:
7 v/ y( \' Z2 z$ p: J- o3 ]# }
2 e8 p* I, W- U* ~ ^ a.Hi-pot fail, especially after 48hours' humidity treatment+ ~, i+ Y# I9 f2 p! e; [0 |& d
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b.Touch current fail$ g4 s$ i3 { v2 i1 j2 Q4 g
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c.Output overload fail: temp. exceeded safety limit. Q* M8 R. @& q& E/ S& O% i
' P" ^5 @7 C$ I$ h8 O- _5 Q d.Component fault simulation: temp.on transformer and output voltage exceeded safety limit
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6.设计更改和生产一致性:
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a. Non-conformance between certification and production
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b. Label format
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" F7 q( n( ~$ v; l7.PCB Layout图提供不对，只提供了器件装配图，没有走线图。 |
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发表于 2007-9-1 14:06
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