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

**sansonet** · 02-26-2022, 06:36 AM

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** · 02-26-2022, 07:04 AM

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** · 02-26-2022, 07:31 AM

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** · 02-26-2022, 10:39 AM

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** · 02-26-2022, 12:14 PM

Quote:

Originally Posted by sam_sam_sam

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** · 02-26-2022, 01:48 PM

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

**sansonet** · 02-26-2022, 07:13 PM

He sent me pic of how it was wired before disconnection

**sam_sam_sam** · 03-05-2022, 08:52 AM

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

02-26-2022, 07:04 AM	#2
stj Great Sage 齊天大聖 Join Date: Dec 2009 City & State: Europe My Country: some shithole run by Israeli agents I'm a: Professional Tech Posts: 28,106	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!

02-26-2022, 10:39 AM	#4
sam_sam_sam Badcaps Veteran Join Date: Jul 2011 City & State: Some times Sunny Jacksonville FL My Country: USA Line Voltage: 120 Volts 60 HZ I'm a: Knowledge Seeker Posts: 4,009	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 __________________ 9 PC LCD Monitor 6 LCD Flat Screen TV 30 Desk Top Switching Power Supply 10 Battery Charger Switching Power Supply for Power Tool 6 18v Lithium Battery Power Boards for Tool Battery Packs 1 XBox 360 Switching Power Supply and M Board 25 Servo Drives 220/460 3 Phase 6 De-soldering Station Switching Power Supply 1 Power Supply 1 Dell Mother Board 15 Computer Power Supply 1 HP Printer Supply & Control Board * lighting finished it * These two repairs where found with a ESR meter...> Temp at 50F then at 90F the ESR reading more than 10% 1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later ) 2 Hem Saw Computer Stack Board All of these had CAPs POOF All of the mosfet that are taken out by bad caps

02-26-2022, 01:48 PM	#6
stj Great Sage 齊天大聖 Join Date: Dec 2009 City & State: Europe My Country: some shithole run by Israeli agents I'm a: Professional Tech Posts: 28,106	Re: Empava KQC65C-17 Built-in Convection Electric Oven - display problem the display is matrix driven and the chip is probably a Holtek clone

03-05-2022, 08:52 AM	#8
sam_sam_sam Badcaps Veteran Join Date: Jul 2011 City & State: Some times Sunny Jacksonville FL My Country: USA Line Voltage: 120 Volts 60 HZ I'm a: Knowledge Seeker Posts: 4,009	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 Last edited by sam_sam_sam; 03-05-2022 at 08:56 AM..

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