Dim Clock LCD on Jenn-Air wall oven

[bluto]

Re: Dim Clock LCD on Jenn-Air wall oven

Glad it worked out for you.

[durkalurk]

Re: Dim Clock LCD on Jenn-Air wall oven

Welcome to the badcaps forums!

I guess I should have put all of that information in my original post. So after one more peek inside the oven, here are the specs and part numbers to order from Digikey. All part numbers listed are for Panasonic FC series capacitors. FM series part number shown in parenthesis where the FC series cap is out of stock at the time of this post.


On the clock module:

C1 & C4 470uF 35v P10301-ND (or the FM series: P12400-ND)
C3 68uF 35v P10292-ND
C7 22uF 50v P10318-ND

On my oven I also replaced the two caps on the power supply/relay board as a precaution. They were as follows:

3300uf 16v P10260-ND [filter cap] (or the FM series: P12373-ND)
47uf 50v P10321-ND [the only other cap on the board]

Of course the power supply/relay board could vary if you have a different model oven (gas for example).

Please update this thread if this information is useful and you are able to repair your clock module.

THANK YOU SO MUCH, this was incredibly helpful and now my oven is working! I made an account just to thank you.

[mertzman]

Re: Dim Clock LCD on Jenn-Air wall oven

swapping out c3 on jenn air board did not help issue. Help ???

[bluto]

Re: Dim Clock LCD on Jenn-Air wall oven

It is difficult to say just looking at that picture. But your symptoms suggest that it is a bad capacitor problem causing the display to fade. If you could post a better picture of your actual board, someone here may be able to spot something. Beyond that, a replacement of all of the capacitors on the board with high quality, low esr caps of the same values may be an approach depending on your soldering skill level.

[cjshaw14]

Re: Dim Clock LCD on Jenn-Air wall oven

Did a little look around and looks like this is the board, any thoughts if the same value or may need to take apart first.

[cjshaw14]

Re: Dim Clock LCD on Jenn-Air wall oven

Hi-
Just joined after reading about all the dim displays but didn't see anything mentioning microwaves. I have a Jenn Air JMV8166BAS, installed in 2007 with a display that has gradually gone dim but still visible in low light. Only problem is this is a combo microwave and hood mounted above the stove, I would hate to take down to open up only to find a sealed PC board. Any thoughts? BTW great site and info all about caps!
Thanks

[bluto]

Re: Dim Clock LCD on Jenn-Air wall oven

Yes it could be bad. C3 (68uf) on these boards is what drives the VFD and causes the fade out. It is usually the only one that is bad. Try replacing it again. If you have a multimeter with a capacitor mode, you can check the capacitance of both old and new.

If you are just coming to this thread and don't want to read all 11 pages, start by replacing C3 to fix the faded out clock. I replaced all caps on mine but it was not required. I can't edit the first post or else I would clarify.

[consurv]

Re: Dim Clock LCD on Jenn-Air wall oven

Actually the 4th pic shows a broken transformer lead. I got it fixed. I took pics of ever inch of the board and magnified them and only 3 broken copper traces and 1 broken transformer lead were found. The C3 cap that was replaced has some give from the leads going into the cap itself. Whenever I give it a rock back and forth I can feel a slight movement in the cap. The solder connection is firm. Do you think this could cause the dim display?

[bluto]

Re: Dim Clock LCD on Jenn-Air wall oven

It seems like you are back where you started. In your 4th picture, it looks like you circled a bad solder joint. You might want to go over the whole board again looking for more of them.

[consurv]

Re: Dim Clock LCD on Jenn-Air wall oven

Hi Bluto, thanks for your reply. The lcd went blank over time and has been for a few years. I did change all caps and repaired the breaks in the copper traces and one break in a transformer lead. I took for repairs at local tv repair shop and computer repair shop. Pics attached, hope clear enough. After repairs there was nothing on the display for days but suddenly dim clock numbers appeared but not to be exclaimed about as others have. A brighter display would be great tho. Any ideas. THANKS

[bluto]

Re: Dim Clock LCD on Jenn-Air wall oven

Did your display fade out gradually or suddenly? Post some pictures of the board.

[consurv]

Re: Dim Clock LCD on Jenn-Air wall oven

This forum has a wealth of info so I spent some more time reading thru lots posts and found out that a copper trace on the board may have a break. Surely enough there were 2. So another try to the repair shop fixed that problem. Reinstalled the the board and again NO DISPLAY. So to recap, I replaces all 4 caps with new ones of same values and fixed breaks in copper trace and still NO DISPLAY. Any advice, please.

[consurv]

Re: Dim Clock LCD on Jenn-Air wall oven

Hi Guys I am new to this forum. I need some help. I have a Jenn Air JES8850BCB slide in range with a blank LCD. After the suggestions of replacing caps on circuit board, I removed the circuit board and took to my local tv repair shop and have all 4 caps replaced. Reinstalled the board but to no avail. The LCD is still blank. Any suggestions would be greatly appreciated.

[bluto]

Re: Dim Clock LCD on Jenn-Air wall oven

I looked at your post again you say the the P/N is 71001799R.... That is the same as mine but without the 'R'. I am going to take a WAG and say that the 'R' means 'Refurbished'. So do what you will, but I'm of the opinion that the refurbishers got it wrong hence why you are here. At least for myself, I sold the no longer dim oven clock containg house two years ago so I no longer have to worry about this or the dreaded "broiler fan runs constantly" problem.

[bluto]

Re: Dim Clock LCD on Jenn-Air wall oven

No, 68uf is what was there originally in C3. The board in your pictures was refurbished by someone other than the factory that made it. The cheapo cap and resistor job screams this fact. If you look at my board in the first post and compare it to yours they will look almost identical. Never mind what they did and just put it back the way it was but with a quality low ESR capacitor (such as Panasonic FC as mentioned in the first post).

Rant to mods.. At some level these really long threads should be able to have the first post be editable so that new information can be added and the first post in the thread becomes the definitive holder of all relevant knowledge that would otherwise be lost among 10 pages of replies. See the avs forums for examples of this.

[SundayRacer]

Re: Dim Clock LCD on Jenn-Air wall oven

Thanks, does it matter the original capacitor is a 220uf 35v, how will changing it to a 68uf affect the board.do I install a replacement resistor with it.

[bluto]

Re: Dim Clock LCD on Jenn-Air wall oven

This has been seen on other refurbished boards: (https://www.badcaps.net/forum/showpo...&postcount=126)

The resistor is a crutch. Remove both the resistor and capacitor replace with a high quality, low esr 68uf 35v capacitor as described in the first post of this thread.

[SundayRacer]

Re: Dim Clock LCD on Jenn-Air wall oven

Jennair SVE47600B

I have a Jenn air model # SVE47600B (s) 18746375WK. Slide in electric range, all operates except the clock display is to dim to read... other then that bake / broil operate. once you get the hang of the inputs. Replaced the board recently, was not aware of this site. Cost a little over $300 with labor. Have the old display... would like to try and repair as spare. original is part # 71001799R. Mine is similar, but not same. Cap C3 is Xion 220uf-35v, -40 - +105c 20%... its connected to a resistor 29om / 5% (red, white, black, gold) or 28om / 5% (red, gray, black, gold). if the C3 is the problem part, has anybody else had this combo.


Thanks

[Silveruser]

Re: Dim Clock LCD on Jenn-Air wall oven

Thanks for this info and can you tell me what this UL stamped part is for? I found stuck to the top of the oven opening and it is magnetized and the connections have rusted.

Some Jenn -Air ovens have a drying mode. The magnet end sticks to the door in a small indented area - as you close the door it pushes in on the door switch. This lets the fan run with the door open slightly for drying at low heat.

[pjkovie]

Re: Dim Clock LCD on Jenn-Air wall oven

Thanks Bluto, I guess that it'll take brute force. Looking at the 1st picture - along the long sides you can see 3 lighter color plastic tabs. That is the circuit board itself protruding though slots in the plastic frame. There are 2 boards with the lower board containing the LCD and the upper board having the caps in question. The frame does flex some, but it certainly feel as though it would break before the tabs release. I guess that I could glue it back together after the repair (if I do break it). I just thought that someone here had some experience with a similar or the same board enclosure since this problem with the bad capacitors seems so prevalent.