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Search: Posts Made By: Use2bavolvo
Forum: Troubleshooting Appliances and other Household Electronic Stuff 01-25-2023, 09:39 PM
Replies: 18
Views: 2,729
Posted By Use2bavolvo
Re: Magic chef oven - thermistor ref voltage issue

Power board 2x 1000uf 35v
Power board 1 47uf 25v
Ic board 1 47uf 25v
Ic board 2 4.7uf 35v

Attached component bought from mouser. I bought the 4 relays but didn't install them. These become...
Forum: Troubleshooting Appliances and other Household Electronic Stuff 01-24-2023, 11:57 PM
Replies: 18
Views: 2,729
Posted By Use2bavolvo
Re: Magic chef oven - thermistor ref voltage issue

Update of everyone.
I replaced 6 caps
3 on power board and 3 on logic board

Happy to report oven is fixed

Recap - thermostat was correctly measuring 1060 ohms at room temp

Oven temp would...
Forum: Troubleshooting Appliances and other Household Electronic Stuff 01-22-2023, 04:27 PM
Replies: 18
Views: 2,729
Posted By Use2bavolvo
Re: Magic chef oven - thermistor ref voltage issue

Parts ordered was able to get the 4 relays as well. Wil update after I get em soldered in. I wasn't able to get current trim on the caps so just went with uf and v plus length which were requirements...
Forum: Troubleshooting Appliances and other Household Electronic Stuff 01-21-2023, 11:11 PM
Replies: 18
Views: 2,729
Posted By Use2bavolvo
Re: Magic chef oven - thermistor ref voltage issue

Looks like we may have found the issue..these caps in macro look buldged out. Digikey didn't have this form factor they are height of 6mm 4.7uf 35v
Forum: Troubleshooting Appliances and other Household Electronic Stuff 01-21-2023, 12:45 AM
Replies: 18
Views: 2,729
Posted By Use2bavolvo
Re: Magic chef oven - thermistor ref voltage issue

After reading about capacitors when degrade creates resistance on the circuit I'm gonna replace the power caps to ensure this is generating a stable voltage. 30y its due.
Forum: Troubleshooting Appliances and other Household Electronic Stuff 01-20-2023, 10:44 PM
Replies: 18
Views: 2,729
Posted By Use2bavolvo
Re: Magic chef oven - thermistor ref voltage issue

R4 is open no resistance

Back of board traces

Second board pic

Also transformer between
pin 1-4 142ohm
pin 8-5 175k ohm
Forum: Troubleshooting Appliances and other Household Electronic Stuff 01-19-2023, 11:39 PM
Replies: 18
Views: 2,729
Posted By Use2bavolvo
Re: Magic chef oven - thermistor ref voltage issue

The resistor is between the relay and fan pin. I did some more research it looks like a fuse resistor does that seem right?
Forum: Troubleshooting Appliances and other Household Electronic Stuff 01-19-2023, 06:36 PM
Replies: 18
Views: 2,729
Posted By Use2bavolvo
Re: Magic chef oven - thermistor ref voltage issue

Model C9875VRV
Control Board part number 7601P225-60

The top board has 3 separate single layer boards this top board does not have any other components just traces.

Middle Section is where...
Forum: Troubleshooting Appliances and other Household Electronic Stuff 01-19-2023, 01:32 AM
Replies: 18
Views: 2,729
Posted By Use2bavolvo
Magic chef oven - thermistor ref voltage issue

I am having an issue with my wall oven temperature control is ~180f out of spec. The thermistor is measuring correctly but I noticed the ref voltage appears to be off. With the thermistor wires...
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