Check D8 diode on SMPS.
Quite often it gets damaged. I had a problem with it in L8 and L16.

Unfortunately there is no diagram for the power supply.

 

Check D8 diode on SMPS.
Quite often it gets damaged. I had a problem with it in L8 and L16.

Unfortunately there is no diagram for the power supply.

Registered just to say - thank you! You saved the day and made this to be super easy fix! Thank you again!

 

I'm glad I could help.

 

Is anyone still actively working on fixing a L8 power supply?
I am working on a schematic as well.
Can anybody tell me where pin 3 of U1 is connected to ?
Thanks,
rudi

 

And U1 part number is?

 

OB2279CP i guess

 

OB2279CP i guess

Yes, the letter after the CP is important! It's V, T or L ....

Thanks,
rudi

 

Here is the complete (more or less) schematic for the L8 Power Supply. Included is also a partial components list.

 

Hello
That's what I found because I have the same pb on L16

Thanks all

 

Repair to JBL extreme PCB.

I was given a JBL Extreme because the owner said that the PCB was burnt and charred. This was caused by using the wrong 9 VDC charger.
The Attached photo show the same board from another JBL extreme with the components in a charred condition. The next photo shows those components as they should look. The third photo shows how I repaired the PCB.
The burnt components marked with red crosses are three 6.8 ohms resistors in parallel and a Schottky SS34 diode. The three 5.6 ohm resistors equate to one 2.3 ohm resistor (I used a 2.2 ohm).
The PCB that I repaired was very badly burnt more so than that first photo. I very carefully scratched out all of the burnt components removing all traces of carbon.
I found where the the common copper ribbon for the resistors at the base of the PCB should be and soldered a bridging wire, I then soldered the 2.2 ohm resistor to the bridging wire and the other end to the IN4007 diode. I have marked where to connect the diode then to the resistor with the path shown in yellow.

With everything assembled I plugged in a 9 vdc 800 milli amp charger. It charged up the battery and the Extreme is booming away. I told the owner that I had managed to repair it, but he said for me to keep it as he had bought another.

 

Check D8 diode on SMPS.
Quite often it gets damaged. I had a problem with it in L8 and L16.

Unfortunately there is no diagram for the power supply.

Hello,
does sb know what exact part

Check D8 diode on SMPS.
Quite often it gets damaged. I had a problem with it in L8 and L16.

Unfortunately there is no diagram for the power supply.

Good day,
I also have a problem with my JBL authentics L8. It seems that the component marked D8 is faulty. On the diode it says PJ351 BR220. I have looked on the internet but have not found a replacement part with this exact designation. I have found very similar diodes under the abbreviation BR220. However, I am unsure whether I really replace the part suitable. Can you help me there?

I thank you in advance for all responses

Translated with www.DeepL.com/Translator (free version)

 

Hello,
does sb know what exact part

Good day,
I also have a problem with my JBL authentics L8. It seems that the component marked D8 is faulty. On the diode it says PJ351 BR220. I have looked on the internet but have not found a replacement part with this exact designation. I have found very similar diodes under the abbreviation BR220. However, I am unsure whether I really replace the part suitable. Can you help me there?

I thank you in advance for all responses

Translated with www.DeepL.com/Translator (free version)

Hey! did you ever find the fix for this i have an L8 with similar symptoms