User's Manual

SEJIN ELECTRON, INC

This Document contains proprietary to Sejin Electron, Inc. Use or disclosure without written

permission from an officer of Sejin is expressly forbidden.

Document number : R-FB-0

Page 7/13

Issued date : 2009-02-11

4.8 Key-top Alignment

The key top alignments will not exceed 0.5mm when top measured between the center to center of

keys next to each other. The measurement will be performed with keys in the home positions.

0.5 mm Max

4.9 Rotational Alignment

The maximum rotation of key shall be less than 0.5mm as shown below.

<0.5mm (1X1.75 Unit key Max)

0.7mm(1X2 Unit key Max)

4.10 End stroke strength

End stroke should withstand a static load of 500gf applied on the tip of the key stem in the

perpendicular direction for 1minute.

4.11 Key-top pull out force

The Key-top pull out force shall be 0.5kg or more at normal temperature during initial state. The Key-

top shall be not pull out by an ordinary typing operation.

4.12 Information for serial number on the back label

0 C A C 0 0 0 0 0 3

Serial No.

Production line(A=A line, B=B line, C=C line)

Product revision number(A~Z)

Produced Month (A~Z)(A=Jan, B=Feb, C=Mar, D=Apr, E=May, F=June,

G=July, H=Aug, I=Sept, J=Oct, K=Nov, L=Dec)

Last Digit of Year(7=2007, 8=2008, 9=2009)