JBL Cinema SB150 Wireless Bluetooth Soundbar Repaired
Received Sound bar for Intermittent Bluetooth working Problem.
I have connected sound bar on power and turned it ON. It has control panel in this order sequence……
1) Standby Release
2) Source select ( AUX/Optical/Bluetooth)
3) Volume –
4) Volume +
5) Mute
6) Bluetooth Pairing.
In front panel there are some LED Indicator Lights which indicates each working Mode like………
After powering ON & pressing of source Button, LED indication changes to Green and White light but not to Blue. So now it is time to inspect the circuit of the sound BAR. Removed the circuits from back side of the BAR.
It has Two Circuits, Controller & SMPS.
SMPS Board
Cleaned Dust from the PCB. Found some Dry solder On SMPS Circuit and revived the solder.
As per physical inspection I did not found any damaged or burnt parts. After cleaning work I re plugged sound bar on Power But it behave as it is. Now my curiosity in this job is Bluetooth area on controller circuit.
Identified Bluetooth circuit location from Antenna on inspection under the magnifier glass. in this area everything seems Ok but I did not able to trace In and Out because there is no marking on the PCB. Again Cleaned the area again with IPA and re plugged the sound Bar on Power to check if any IC or other parts are getting abnormally hot.
But I did not found any overheating Component. Now I have to check another circuit…… Control Panel Circuit.
On testing operating of some keys I found “+” switch suspected because when I press the “+” switch I can see Blue Light is coming ON and goes OFF instead of increasing the Volume.
So opened the circuit and checked the switch for Continuity, on pressing I found Instead of Continuity it shows some reading.
Removed the “+”switch for testing because some time testing components on PCB may multimeter gives false reading.
Meter is showing around 1.6K ohm reading instead of continuity beep.
So for Curiosity I opened the micro push switch for inspection.
I found Contacts and Metal dome is badly oxidized. it can work perfectly after cleaning the contacts by scrubbing with sharp knife and then cleaning with “IPA” but critical part of switch to relocate the metal square Frame. Because when you put some glue on it glue will get drip down into the entire functional area and switch becomes useless.
So decided to change all the micro switches. After replacing all the switches. Now Sound bar is back to work.
Standby –Amber Light Indicator.
AUX – Green Light Indicator.
AND Bluetooth – Blue light Indicator.
This article was prepared for you by Yogesh Panchal who works as a Computer Hardware Engineer in Mumbai India.
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Note: You can check his previous repair articles on Dell 2015hF Monitor Repaired
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27 Comments
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Waleed Rishmawi
March 11, 2022 at 10:08 pm
Wise decision on replacing all the micro switches and a very good job on the repair. Have a blessed day
Yogesh Panchal
March 14, 2022 at 10:25 pm
Thank you! waleed
Ajay Bhanot
October 6, 2022 at 11:40 pm
hi Yogesh interesting article. I have JBL SB450 and want to use the sub woofer with another wired amplifier, can u advise if there is way to put a bi pass on the sub woofer circuit to use it as a wired sub woofer?
BIBIN
January 31, 2023 at 12:49 pm
Hi
I miss placed the Remote.how, where i can get.
Ppz i need this model remote.
Parasuraman S
March 11, 2022 at 10:17 pm
It is always better to replace these microswitches, as it might leak when in operation of the circuit. Multimeter might not always be able to show it. Good job there!
Yogesh Panchal
March 14, 2022 at 10:25 pm
Right Sir!
Albert van Bemmelen
March 11, 2022 at 10:53 pm
At my friends ICT shop we several years ago had a similar bluetooth soundbar for repair, but it was one from Sony. The 2 bluetooth transmitter modules in that model, one for each audio channel of which only one was defect, could only be replaced by an expensive new upgrade module. Because the older modules used in the defect soundbar weren't available anymore, which then also required us to replace also the matching channel receiver module. Else they apparently would not work according to the Sony dealer. So it became way too expensive for the owner to get the device fixed. Buying a new one was cheaper which is a bad thing when so much value in parts is scrapped by Sony this way!
Yogesh Panchal
March 14, 2022 at 10:33 pm
Albert,
Finding replacement of Bluetooth is not easy because every Bluetooth is having different mode of operation.
sometime we confuse in these day's repair business where you spend time for diagnosis and end result is "repair is expensive".
ANIL KUMAR V K
March 11, 2022 at 11:31 pm
Good job
Yogesh Panchal
March 14, 2022 at 10:34 pm
Thank you! Anil
Anwar Shiekh
March 12, 2022 at 3:54 am
I sometimes used silicone oil on switches
Yogesh Panchal
March 14, 2022 at 10:44 pm
Anwar Shiekh,
I think pure Silicon Oil is just lubricant having characteristic of Dielectric which is not help to clean the Contacts it works as excellent electrical insulators yes it definitely used to protect from dust & Moisture.
Imoudu Onwumah
March 12, 2022 at 4:18 am
A good way to troubleshoot sound bar,I never repair one.Trying to repair a micro switch could be combersome,considering its size.From this article I have learned a new thing.Thanks for sharing.
Yogesh Panchal
March 14, 2022 at 10:47 pm
Imoudu Onwumah,
Thanks! for your comment, every day we are learning some thing new from this blog.Thanks! to jestine sir for providing this platform.
kaliraj
March 12, 2022 at 6:24 pm
Great..thanks for sharing
Yogesh Panchal
March 14, 2022 at 10:47 pm
Thank you! kaliraj.
Tayo
March 12, 2022 at 11:22 pm
These new radio/speakers are a major pain for me. For one thing boards and all their components are very small and mostly unmarked making it nearly impossible to troubleshoot them without the aid of a microscope, needle probes and a schematics (good luck finding one of those). The other thing is the components are not very robust and little things like slight over-current, over-voltage, drops, dust, liquids, etc can render any of the micro SMDs or buttons inoperable. I guess with the proper tools, training and experience you can overcome these things but its like performing surgery on insects.
Yogesh Panchal
March 14, 2022 at 10:53 pm
Tayo,
Thanks! for your comment.yes if you want to survive in this Repair field you must obtain at-least HD Microscope / Needle Probe for multimeter /Hot air rework station & micro soldering Iron for basic work & learning how to programming IC is also Must.
Babu M S
March 13, 2022 at 1:57 pm
Very good repair work.The article presented very nice manner. Thank you very much for sharing.
Yogesh Panchal
March 14, 2022 at 10:54 pm
Babu M S,
Thanks!for your encouraging words.
M P DEEPAK
March 13, 2022 at 6:15 pm
Can i get a 18 v 3.3 amp output adapter for jbl onbeat rumble
Yogesh Panchal
March 14, 2022 at 10:59 pm
M P DEEPAK,
Sorry Bro. please find it out from local market/Shop in your area, On-Line it is very expensive.
jai Etwaroo
March 24, 2022 at 10:23 pm
Nice job Yog.
Yogesh Panchal
March 26, 2022 at 6:21 pm
jai Etwaroo
Thank You!
Prem Sagar Ambati
August 22, 2022 at 1:31 am
can i get SMPS Board spare are parts if yes where
Lloyd peter buala
December 9, 2022 at 9:44 am
Hello… can you help me repairing for jbl sb150 soundbar, this problem when it on and sound after a few minutes it turning off the sounds i check possible grounded or shorts its ok but why ic TD1509 PR area its to hot not normal…
Sumeer
September 21, 2023 at 12:48 pm
Hi,
Same set is with me and not working. When technician came he told me the pcb is faulty need to replace it. But doing this operation the display 9 pin pitch cable damaged. So he told the cable is not available in local market. Can you please help me by providing information for getting this 9 pin display cable which connects switch board and PCB