Empava KQC65C-17 Built-in Convection Electric Oven - display problem

[sansonet]

My friend asked me to check this oven display, its Empava KQC65C-17, and the part is not available even from the manufacturer. On the bottom of the first pic temperature digits have some LEDs off. Im trying to figure out what parts/components could be the culprit so I can test them. Also what connectors I should use to power it on? I only have those two boards in the house, not the entire oven, but looks like it can be powered on from 110 or 220V.

[stj]

Re: Built-in Convection Electric Oven - display problem

get a 3v coincell battery and try to light all the segments.
there is a good chance the actual leds are bad.
notice the uneven brightness in the working ones!

[sansonet]

Re: Built-in Convection Electric Oven - display problem

what points I should use to connect 3V? Should I use 5V/gnd pins on the power board (pic #5)? This connector goes to the display board. I have 5V DC adapters I can use, also lipo batteries 3.7-4.2V.

This is part of the board on the backside of display, top left are connector pins

[sam_sam_sam]

Re: Empava KQC65C-17 Built-in Convection Electric Oven - display problem

Dose this display pins go to an ic chip of some type if dose then might be a chance that that chip could be this issue or if the display has a multiplex common pin that connects all the diodes to a common negative or positive terminal I have seen these displays do this when they fail

I not a big fan of this type of display

[sansonet]

Re: Empava KQC65C-17 Built-in Convection Electric Oven - display problem

I am not a big fan of this type of display

yes, it's only 5 y.o., but useless now without being able to set up the temperature. The manufacturer would not even sell this part because they said it's "too old" and they don't carry it anymore.
I still trying to figure out how to power it up, can't do much without it.

[stj]

Re: Empava KQC65C-17 Built-in Convection Electric Oven - display problem

the display is matrix driven and the chip is probably a Holtek clone

[sansonet]

Re: Empava KQC65C-17 Built-in Convection Electric Oven - display problem

He sent me pic of how it was wired before disconnection

[sam_sam_sam]

Re: Empava KQC65C-17 Built-in Convection Electric Oven - display problem

I look up this brand and found that there products are not cheap to buy for something that seems to be made in China

$600.00 to over $1000.00 the question I have is how good is there quality for the money and not to offer repair parts is very big problem for me when deciding on buying something like that