Repair Sylvania Model 72032 LED Lite?

LED Lite or LED lites in general.

I am not familiar with that lite, but have you taken it apart to see what kind of batteries it uses? That is the first step.

On Fri, 2 Nov 2012 09:28:28 -0700 (PDT), KenO put finger to keyboard and composed:

I'm wondering if supercaps or ultracapacitors could be used in this application.

- Franc Zabkar

...

If the battery is bad, replace it. The typical 'emergency lighting' appliance has to be tested from time to time, and commercial units recommend battery replacement every ten years, regardless of test.

So, figure a battery has 10 year mean time between failure. There might be 10% of the batteries that fail in the first year, and another 10% that are good after fifteen years.

Collecting anecdotes over the internet isn't going to be very useful in this kind of situation. Maintaining your emergency lighting, IS very useful. So, do it.

"I am not familiar with that lite, but have you taken it apart to see what kind of batteries it uses? That is the first step."

Bob I Agree.

Also would like to take it apart without totally destroying it.

Do you have any suggestions, especially concerning de-bonding the plastic parts.

There is a plastic ring around the main LEDs end and a clear plastic cover around the night lite LED end. Amazon has a good photo.

Was thinking of using a wrench to try to twist off but am afraid of shattering these parts.

Am wondering about de-bonders?

Ken

t kind of batteries it uses?   That is the first step."

parts.

r around the night lite LED end.  Amazon has a good photo.http://www.amazon.com/Sylvania-72032-Sensor-Failure-FAILURE/dp/B000KJ...

ering these parts.

It's not that expensive at $14. I would take a very sharp/brand-new utility knife to the seams and carefully cut the unit at all the visible seams, like in a circle around where the clear lens fastens to the body, and elsewhere that you can find anything that looks like where two pieces of plastic were joined together. Superglue is great at re-attaching these separate pieces after you have fixed it.

Finally got the non working Sylvania Model 72032 LED Lite apart and checked the battery and fuse and they were OK but a component next to the fuse showed burn marks so am guessing this was what gave out.

While it is sold in USA as the Sylvania Model 72032 LED Lite, it is actually manufactured by LOMAK and inside the plastic shell is marked T4-1.

Did some searching using both Sylvania Model 72032 and LOMAK Model 72032 but to date have been unable to find either a parts list or schematic for it.

Would be interested in any suggestions how to find either the parts list or schematic.

Alternatively would be interested in trying to determine what the burnt component is.

I have taken some photos and would be glad to post if there is interest.

Thanks again for all your help.

Ken

On Sat, 10 Nov 2012 12:57:32 -0800 (PST), KenO put finger to keyboard and composed:

I'm interested.

- Franc Zabkar

"I'm interested...Franc Zabkar...Please remove one 'i' from my address when replying by email."

Franc,

I did not see a way to post the Sylvania Model 72032 LED Lite Photos on the forum so tried sending them to you but got error message The message To: Cc: or Bcc: field contains a malformed email address.

If there is a way to post photos on forum please tell me how.

Thanks again for all your help!

Ken

On Tue, 13 Nov 2012 07:51:10 -0800 (PST), KenO put finger to keyboard and composed:

forum so tried sending them to you but got error message The message To: Cc: or Bcc: field contains a malformed email address.

This is a text-only forum. You could upload your photos to a file sharing service.

As for my email address, it is valid, but you need to remove one "i" ...

- Franc Zabkar

If you are the only person interested in the photos, it would be easiest to send them to you.

"As for my email address, it is valid, but you need to remove one "i" Franc Zabkar

Somehow I am having problems with your email address even after removing an "i".

Please send me a "test email" and will reply with photos.

Thank you again for your help!

Ken

On Fri, 16 Nov 2012 10:08:14 -0800 (PST), KenO put finger to keyboard and composed:

send them to you.

I have taken the liberty of uploading your photos to my web space:

- Franc Zabkar

On Tue, 20 Nov 2012 07:50:05 +1100, Franc Zabkar put finger to keyboard and composed:

send them to you.

The component below the fuse looks like it may be a series resistor for the zener diode (ZD1). Together they would constitute a crude zener regulated DC supply.

Measure the voltage across the zener and compare it against the markings on the zener's body. This should tell you if the supply is working correctly. I expect that there would be a filter capacitor on the reverse side of the PCB (could we see that as well?).

- Franc Zabkar

On Tue, 20 Nov 2012 07:50:05 +1100, Franc Zabkar put finger to keyboard and composed:

send them to you.

I have just added the photos of the reverse side.

- Franc Zabkar

Franc,

Thanks for all your help!!!

"Measure the voltage across the zener and compare it against the markings on the zener's body. This should tell you if the supply is working correctly."

Am a electronics beginner which is the reason I am interested in trouble shooting this LED Lite.

How do I "Measure the voltage across the zener"?

Ken

On Fri, 23 Nov 2012 10:02:08 -0800 (PST), KenO put finger to keyboard and composed:

the zener's body. This should tell you if the supply is working correctly."

shooting this LED Lite.

With respect, voltage measurement is a very basic task. If you have to ask this question, then you shouldn't be working on this device. There are lethal AC voltages inside.

That said, here is the zener regulated supply:

Vin o-- R --|----|---o Vout | | Z C | |

Z = zener diode C = electrolytic capacitor on reverse side R = series resistor

Measure Vin with respect to 0V, and also measure the voltage between Vout and 0V.

Examine the markings on the zener.

- Franc Zabkar

On Sat, 24 Nov 2012 06:33:13 +1100, Franc Zabkar put finger to keyboard and composed:

Here are you measurement locations:

- Franc Zabkar

Franc,

"With respect, voltage measurement is a very basic task. If you have to ask this question, then you shouldn't be working on this device. There are lethal AC voltages inside."

Agree, which is why I have not plugged in this LED Lite to AC.

Had hoped I could do the measurements without plugging it in!

"Examine the markings on the zener." What am I looking for? From your looking at the photos I sent what are the possible variations? Thanks again for your detailed explanations and help!

Ken

Franc,

"Examine the markings on the zener."

Forgot to ask, do you recommend trying to clean the zener diode to better see any band markings?

If yes, what do you suggest?

Thanks

Ken

Lite or LED lites in general.

I have the same light, if you find a good battery for replacement, please post it. I need three! Mikek