Rev. A Product Overview Appendix D-37
TM-H6000/H6000P Service Manual
Confidential
Cover open detection mechanism
A transparent photo sensor consisting of an LED and photo transistor is mounted on the cover
open circuit board, which is fixed to the right frame. The frame cover has a blind linked to this
transparent photo sensor that enters a slit in the photo sensor when the frame cover is closed
properly, interrupting the light rays.
On the other hand, when the frame cover is not all the way closed, light from the photo sensor
passes through the slit. The output level of the photo transistor detects whether the cover is
open or not.
Figure D-47
Frame cover
Right frame
Photo sensor
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