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好久不来,变化巨大啊,发个贴先!
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5 L' \+ g' m& k5 c7 T1、标志不当:
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9 g8 g6 ^2 E7 _4 a a.fuse marking
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4 S: v$ g" z; V& v/ n, D b.power switch symbol
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c.protective earth symbol0 p7 ]3 g( |" F3 M1 R/ r" |
% d. H$ h, u$ _! c! ~5 W' x/ [ d.PE wire color/ A8 Z% ^2 B" Q- X, f
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2.安全说明:
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7 w" e; a- Z8 e n a.Motltipower supply system M6 D1 t0 E0 C8 Z$ [
6 |5 H, w% V `: E2 U b.protective earth connection instruction
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c.High touch current warning label5 Y& E) S5 i7 w1 Y; @, r1 t& k- P
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d.Hazardous voltage
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3.绝缘距离:$ s3 Y1 ^& R+ @. j
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a.10N force requirement for all parts
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+ W( @& B W7 L# L b.misunderstand bulk capacitor's insulation specifications
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c.Ill assembly' @! T! V! v8 g' d4 ~) [9 r2 Z
" i. j8 E5 c6 Q1 i7 P: n d.misunderstand fan wire's insulation feature 8 x4 Y- w8 c% R/ ^0 s7 C
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e.transformer construction fail: margin tape width and turns of insulation tape
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1 {2 L. J y% O0 I: E4.资料和元器件:
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# G$ i( F' I% _* p2 K a.certificate out of validity
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b.misuse component certificate: UL and European standards different9 A6 w9 x+ t) f7 \
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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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e.misunderstand components
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5.安规测试:
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) R6 T; @. s0 \) G+ z6 n6 _% ?: f: y a.Hi-pot fail, especially after 48hours' humidity treatment
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; v. M# C$ \5 a7 j b.Touch current fail
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c.Output overload fail: temp. exceeded safety limit3 D" T# `$ p1 D
1 V8 N% E7 h1 e) ?7 ]6 v1 E 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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- F, O$ B6 n5 l* N- M6 @7.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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