4.2 KiB
tags, Created time, Project ID, Status
| tags | Created time | Project ID | Status | ||
|---|---|---|---|---|---|
|
2022-12-05T19:37 | RepairKenwood | Not started |
Overview
Kenwood Prospero KM262
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.
In Search of the Fault
Other Posts with KM262 Faults
[!info]
https://www.fixya.com/support/t15247441-kenwood_prospero_km262_stopped_working
[!info]
https://www.fixya.com/support/t20913365-km262_will_not_start
[!info] Hyperentang's Blog
First, a correction.
https://hyperentang.wordpress.com/page/2/
[!info] Panne Kenwood km262[résolu]
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
https://forums.futura-sciences.com/depannage/914634-panne-kenwood-km262-resolu.html
[!info]
https://www.fixya.com/support/t25382723-put_kenwood_km262_back_together_get
Especially the last link sounds very familiar to my problem (described below in the section about the sensor).
Switches
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
Relay Test
I have found the exact relay which is on the board: Song Chuan 845 - 2C - V. It is a double pole double throw relay with the following schematics:
!
Relay Schematics - double pole, double throw
The low voltage coil side is rated for up to 24V, whereas the high-power switching side is rated up to 230V and 5A.
I have tested to energize 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.
Sensor by Food Processor (Name: KW706575, Marking: 137 103b)
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.
[!info] Kenwood Position Speed Sensor
Buy Kenwood spares for your cooker, dishwasher, fridge, freezer, tumble dryer and washing machine.
https://www.4kenwood.co.uk/prospero/km262/position-speed-sensor/product.pl?pid=1352278&path=590704:622774,590797&model_ref=13827737
[!info]
[!info] Kenwood Position Speed Sensor
Buy Kenwood spares for your cooker, dishwasher, fridge, freezer, tumble dryer and washing machine.
https://www.4kenwood.co.uk/prospero/km262/position-speed-sensor/product.pl?pid=1352278&path=590704:622774,590797&model_ref=13827737
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.