servis fridge freezer diagnostic - help required

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1 Feb 2008
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Manchester
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My servis fridge freezer defrosted. No compressor acticity. LEDs and fan are on. I have done a compressor test i.e short CN7 (adjacent wires ) to the control circuit board, and the compressor comes on, freezer gets cold.
I've already had a go at replacing many of the components on the board ( something I did previously, a year or so ago for a different fault ) this time to no avail.

What I'd like to get is a wiring diagram of this model m0330s and try to figure out if it really is the control board, or perhaps one of the two sensor-like-looking modules in the freezer compartment. One of which is attached to the cooler fins, the other just to the plastic.

Anyone got any ideas or suggestions ( other than just buy a new board to suck it and see ) or a wiring diagram ?
 
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I would have thought it more likely to be a thermostat problem, I'm not familiar with that model, but probably one of the sensor like modules that you describe. Do either of them have wires or a small tube that goes to either the control board or another component that is connected to the board?
 
Most likely, yes. Unfortunately all the wires are blue white and brown to the circuit board making it impossible to tell where they go to - hence the request for a wiring diagram :)

I'll try uploading some pics.
 
All you need to do is a continuity/resistance check on the pair of wires from each stat. I would guess that you will find one pair that is open circuit rather than conducting. They just act as a temperature controlled switch. Or are you saying you cannot get to where the wires run & so tell which wire goes where, if so try to find 2 pairs that conduct when disconnected from the pcb. I know this does not definately prove anything but it is something to check before you go ordering boards. Sorry but I think you have as much chance of getting a circuit diagram as of winning the lottery :(
 
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Wiring diagrams were hard enough to get before Servis went bust several years ago, near impossible now.
 

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