Shredders have a light emitter and detector inside the slot where you put the paper. When the paper is put in, the emitted light is reflected off the paper, detected, and then turns on the shredder by sending a signal to the control board. The emitter/detector often has a plastic cover which over time collects paper dust. The paper dust can reflect the emitted light back onto the detector, causing the shredder to remain on. You may need to remove the top of the shredder and remove the shredding mechanism to get to the light sensor. It's also possible that the components on the control board have changed value, causing the detector sensitivity to increase. This may result in the unit turning itself on in daytime and off at night.
We just went thru this, repairing a shredder for a store. We had to replace the eyes 3 times before we got it to work properly. The company thought it was the mother boards, after we replaced the eyes, so they sent out the boards, and luckily another set of eyes. After the boards were replaced, it still did the same thing, so we decided to change the eyes one more time, this time, the harness had one plug, instead of 2 seperate plugs, and boom, it workedWe just went thru this, repairing a shredder for a store. We had to replace the eyes 3 times before we got it to work properly. The company thought it was the mother boards, after we replaced the eyes, so they sent out the boards, and luckily another set of eyes. After the boards were replaced, it still did the same thing, so we decided to change the eyes one more time, this time, the harness had one plug, instead of 2 seperate plugs, and boom, it worked
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Shredders have a light emitter and detector inside the slot where you put the paper. When the paper is put in, the emitted light is reflected off the paper, detected, and then turns on the shredder by sending a signal to the control board. The emitter/detector often has a plastic cover which over time collects paper dust. The paper dust can reflect the emitted light back onto the detector, causing the shredder to remain on. You may need to remove the top of the shredder and remove the shredding mechanism to get to the light sensor. It's also possible that the components on the control board have changed value, causing the detector sensitivity to increase. This may result in the unit turning itself on in daytime and off at night.
We just went thru this, repairing a shredder for a store. We had to replace the eyes 3 times before we got it to work properly. The company thought it was the mother boards, after we replaced the eyes, so they sent out the boards, and luckily another set of eyes. After the boards were replaced, it still did the same thing, so we decided to change the eyes one more time, this time, the harness had one plug, instead of 2 seperate plugs, and boom, it worked