vault backup: 2025-02-03 08:29:48
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2 Personal/Home Lab/Repairshop/Repair Climbing Light.md
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---
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Created time: 2023-07-02T12:35
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Project ID: RepairClimbingLight
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Status: In progress
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---
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Overview
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Druckknöpfe sind Kabutt
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![[image.jpg]]
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Links nach rechts
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- on/off
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- 50%
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- 100%
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- Gnd
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Die aktion passiert immer wenn der Knopf losgelassen wird.
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2 Personal/Home Lab/Repairshop/Repair Kenwood.md
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---
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tags:
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- DIY
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- Repair
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Created time: 2022-12-05T19:37
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Project ID: RepairKenwood
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Status: Not started
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---
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# Overview
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# Kenwood Prospero KM262
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The machine has stopped working and has been making clicking sounds whenever it got turned on. This seems to be a relay that is activated in order to allow power to flow to the motor.
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## In Search of the Fault
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### Other Posts with KM262 Faults
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> [!info]
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>
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> [https://www.fixya.com/support/t15247441-kenwood_prospero_km262_stopped_working](https://www.fixya.com/support/t15247441-kenwood_prospero_km262_stopped_working)
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> [!info]
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>
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> [https://www.fixya.com/support/t20913365-km262_will_not_start](https://www.fixya.com/support/t20913365-km262_will_not_start)
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> [!info] Hyperentang's Blog
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> First, a correction.
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> [https://hyperentang.wordpress.com/page/2/](https://hyperentang.wordpress.com/page/2/)
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> [!info] Panne Kenwood km262[résolu]
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> Bonjour mon robot c'est arrêté,après vérification il semblerait que la résistance R1 de la carte de commande soit hs , quelqu'un sait t'il les
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> [https://forums.futura-sciences.com/depannage/914634-panne-kenwood-km262-resolu.html](https://forums.futura-sciences.com/depannage/914634-panne-kenwood-km262-resolu.html)
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> [!info]
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>
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> [https://www.fixya.com/support/t25382723-put_kenwood_km262_back_together_get](https://www.fixya.com/support/t25382723-put_kenwood_km262_back_together_get)
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Especially the last link sounds very familiar to my problem (described below in the section about the sensor).
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### Switches
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With the multimeter I have probed all the different switches and potentiometers. They all seem to work. I was a bit confused by the main knob’s potentiometer, which gave weird readings
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### Relay Test
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I have found the exact relay which is on the board: Song Chuan [845 - 2C - V](https://www.mouser.com/datasheet/2/378/845-179617.pdf). It is a double pole double throw relay with the following schematics:
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![[Untitled.png]]
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Relay Schematics - double pole, double throw
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The low voltage coil side is rated for up to 24V, whereas the high-power switching side is rated up to 230V and 5A.
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I have [tested to energize](https://www.google.com/search?q=test+relay+with+multimeter&oq=test+relay&aqs=chrome.1.69i57j0i512l9.9664j0j1&sourceid=chrome&ie=UTF-8#kpvalbx=_7VmOY-TQMcqJ9u8PxZysyAQ_43) the coil with a car battery (13.3V), which immediately made the clicking sound. The switch did get thrown to the other side (tested with a multimeter, while powering the relay). —> The relay is working.
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### Sensor by Food Processor (Name: KW706575, Marking: 137 103b)
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There is a sensor which is attached somewhere close to the food-processor that might be the cause. I have found spareparts for it online, but I don’t know exactly what it is for.
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> [!info] Kenwood Position Speed Sensor
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> Buy Kenwood spares for your cooker, dishwasher, fridge, freezer, tumble dryer and washing machine.
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> [https://www.4kenwood.co.uk/prospero/km262/position-speed-sensor/product.pl?pid=1352278&path=590704:622774,590797&model_ref=13827737](https://www.4kenwood.co.uk/prospero/km262/position-speed-sensor/product.pl?pid=1352278&path=590704:622774,590797&model_ref=13827737)
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> [!info]
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>
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> [https://de.aliexpress.com/item/1005002331737461.html?spm=a2g0o.detail.1000016.1.1dd238b7Jg2wRM&isOrigTitle=true](https://de.aliexpress.com/item/1005002331737461.html?spm=a2g0o.detail.1000016.1.1dd238b7Jg2wRM&isOrigTitle=true)
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> [!info] Kenwood Position Speed Sensor
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> Buy Kenwood spares for your cooker, dishwasher, fridge, freezer, tumble dryer and washing machine.
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> [https://www.4kenwood.co.uk/prospero/km262/position-speed-sensor/product.pl?pid=1352278&path=590704:622774,590797&model_ref=13827737](https://www.4kenwood.co.uk/prospero/km262/position-speed-sensor/product.pl?pid=1352278&path=590704:622774,590797&model_ref=13827737)
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It seems to me that the sensor is the culprit, because whenever I move it somewhere else, it behaves differently and sometimes the motor starts turning very fast, out of nowhere. I managed to get the normal start-up behaviour a few times in a row and as soon as I moved the sensor around it stopped working once again. But it was not very logical and I cannot be certain.
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# Research
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