BOSE Solo 10 Help - No Power Up - Pics + PCB Part List

[DarkRye]

Last word for the night, after removing the defective diode I measured a the frequency and duty cycle at the two terminals (boxed in red) with respect to the DC GND (circled in red). I observed a Duty Cycle of 60Hz with intermittent spikes +80Hz and and a duty cycle of 29.x% wherein the X fluctuates.

I suspect the switching circuit is operating normally - though the spikes are of concern. I will attempt to reinstall the resistor in the area and see if it affects the stability of the switching circuit tomorrow. Suggestions are welcome.

 

[marathony]

Hi Guys, Haven't had a chance to have a look at the Bose system recently but started looking at it today. For the guys who has problem with their SMPS worth looking at this video bellow. This guy explains how the circuit works and its pretty simple once you break it down in small sections. It might be worth doing this. I will test my Bose board with voltage injection method and see if fires up. will get back to you guys once I've made some progress. Lets fix these units!!!

 

[Enno]

Hi there, check IC Spanison FL032PIF. Heat with hot air and then power on. if the typical tone comes, replace the chip. Is a main problem of the Cinemate 1SR, same chip installed. Problem, device does not start, no 24V power feedback.

 

[FaithGraham]

Yes that is the same as me right now, cant test til I got it wired up again.

I have found this video that actually just got uploaded 1 week ago on youtube.
It is the Bose Solo unit being diagnosed by a youtuber with similar issues. He explains it in more detail, and I understand more about the board now.

Thought it might be of assistance:

Fortunately I have ordered one of the components that he changes out, but might require the other 2 (Smaller Chip he replaces, and the transistor(the one missing in his video)). Will update when I got new components in, and some sort of test results! Parts will be here tomorrow hopefully.

Thanks for sharing this video, it will help me.

 

[Enno]

Are bad solder connections or the memory IC itself. It is best to replace IC with solder pins. Power supply with old power pack from Neato vacuum robot 24Volt 2A.

 

[Enno]

Are bad solder connections

 

[viorel]

Hello,
I have a bose solo tv that starts randomly. The power supply is ok and I can't find the problem. Does not seem to enter standby correctly. sometimes it remains with a higher consumption and then it does not start.
Any idea what it might be?
I changed the quarters, I put some filter capacitors ... in vain. When it starts, it works perfectly...

 

[Crunche]

Hi, I have looked at a solo TV which does not turn on at all once powered. The assembly is of very good quality with multi-layer epoxy PCB. Components selection are also good with well-known brands for the passive. The power supply uses a half-bridge driver from Fairchild semi and I believe it is an active-clamp circuitry. On my board, the 24-V is alive but no reaction to the remote control despite good batteries. I checked all the dc-dc regulators to verify for too high a ripple of an absence of dc voltage, all ok. Finally, I realized there was a TI DSP, a D808K023CPTP4, custom-made for Bose. I remember fixing a Yamaha home theater amp a while back and the DSP was also having problems with an early failure issue. TI had released a service note indicating a replacement part. For the solo TV, it can be the same problem. To identify it, I heated up the DSP for a few tens of seconds - do not fry it if you try, remain below 150 °C - and when I powered up the supply, I could hear the bar chiming and then the remote turned the light on. Injecting music via the RCA did produce a good sound. Then, turning it off several times, it did not restart so this is the issue here also. There are some of these DSPs on eBay but I am not sure if once replaced a firmware needs to be flashed around. Anyway, while the solo was alive, I did successfully update the firmware (connect a USB key while the solo is lit, the drive blinks and it extracts configuration data from the solo, then remove it. Download the program from the Bose website and install it on your PC. Run it and it copies the latest update on the drive. Switch the solo off, insert the drive quickly, turn the solo on again and it did update the bar). I could then successfully restart the bar and enjoy it but I doubt it will last. This is really sad as the system if of good construction : {