JBL Audio Players & Recorders - Recent Questions, Troubleshooting & Support
Tweeter not working on 15" EON G2
I have the same problem and the same conditions.
The tweeter is good, 3.8 ohms.
Some points of solding (donuts), have bad aspect.
I resolder the power transistors to the PCB and I solve the problem.
Sound problem with JBL Creature II
I had a problem with the speakers not working properly. The green lights lit, but the amount of sound coming from the speakers compared to that of the sub was much lower.
I decided to take it the speakers apart.
I found that the magnets on the speakers had moved forward slightly in the plastic cage they sat in. I pushed them back as far as they would go, and Hey Presto! working again!
I hope this helps someone!
My jbl pb 10 has a noise and it burn the fuse...
It blows the fuse because a semiconductor device has developed a short (in otherwords acting like it was just a piece of wire). Because of the noise I would suspect the main amp device is the cause. It will be most likely on a heatsink.
5/25/2021 1:50:02 AM •
on May 25, 2021
My JBL PB10 lights up
As long as its not blowing the fuse it can be saved - look for Edwards Electronics - Ebay - We fix them . Thanks.
5/25/2021 1:47:26 AM •
on May 25, 2021
Finding why my JBL CS300.1 amp.keeps.blowing fuses
The process involved in troubleshooting and repairing that amp requires specialized tools and meters. You would need to check all the capacitors to see if they are okay by using ESR and capacitance meters, To check the semiconductors you need to unsolder at least one leg and check them unless they are integrated multistaged devices. IF they are you need to check their current draw.
1/6/2021 1:16:41 AM •
on Jan 06, 2021
Subwoofer making crackle or static like noise
An answer I given to another post.
While walking in my neighborhood, a JBL PB10 was thrown away for garbage pickup. I can use another subwoofer so I brought the orphan JBL PB10 home. It has the same problem. I am a retired electrical engineer. If I get the schematic, I might be able to fix it. I indeed found the service manual from the following URL. It turned out you can fix the problem by just cutting off one pin of a transistor. I don't think most people are interested in theory, but just a brief and then the solution.
JBL PB10 service manual
The manual is for the version 6.3 circuit board. I have a version 7.3. But, they are the same for my purposes. The LED lights are controlled by an integration circuit shown on page 28. When the signal at the low level line input is smaller than 5mv rms, the LED lights are set to red. In the meanwhile, the integration circuit set the Q1 junction FET transistor to on so the SIG signal is grounded to subdue any nuisance of noises (no sound produced). When there is a significant signal at the line input, the integration circuit set the LED light to green and turns off the Q1 transistor so the SIG signal can be freely amplified by the AIM power amplifier.When the integration circuit malfunctions, most probably C42 fails (could also be C40 and/or C41). I don't have any capacitors at hand to fix so I just cut off one of the three pins in the Q1 transistor to disable it from grounding the SIG signal. Q1 location could be found on page 26. The pin to cut off is one of the two outer pins. It is the one further away from C40. Once you cut the pin off, the sound will be back. But the LED lights remain red.
How to factory reset a JBL onbeat awake
For the JBL Awake
I just had the same issue and i found a way to solve this :
1. Unplug the power supply
2. Plug it back while holding the [ON/OFF] button
3. The screen shows “UP9” again
4. Do the update with the JBL Music app (I did it with my old iPhone 4s plugged on the 30pin connector)
5. Finish the firmware update ... until the app tells you to unplug the power before restarting the device
(Sorry for my bad English, i’m French)
9/4/2020 1:39:26 PM •
on Sep 04, 2020
Where's the so to speak amp on jbl charge 3
The controls for the JBL Charge 3 are up top and you have volume up and down, Bluetooth pair, power, play/pause, and a button to link this device to other JBL speakers. There is no skip button, but if you hit the play button twice quickly it will skip to the next song
6/18/2020 9:25:56 AM •
on Jun 18, 2020
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