| 摘要 |
PROBLEM TO BE SOLVED: To easily know which part is exchanged or how often the part is exchanged in a stroboscopic unit by printing and displaying a mark showing the number of exchanging times on the surface of a printed circuit board near an exchanged light emitting part or an electric part for a stroboscope. SOLUTION: The mark showing the number of exchanging times is printed by using laser marking and displayed on the surface of the printed circuit board 11 positioned near the exchanged light emitting part 12 or the electric part for the stroboscope. Namely, a circle mark is printed. One circle 21 is printed near the light emitting part 12 and two circles 22 are printed near a main capacitor 13 on the surface of the board 11. One circle shows that the part is exchanged once, and two circles show that the part is exchanged twice. Therefore, it is known that the light emitting part 12 is exchanged once and the capacitor 13 is exchanged twice. Whatever sign is used as the mark to be printed and a numeral, etc., can also be used.
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