Antique Balance Scale Restoration – A beautiful antique balance scale restored from the trash heap
Bose L1 Tower PA Repair – Troubleshooting and fixing the notorious Bose L1 “Auxiliary Power Supply” failure
Emco Maximat V10P gearbox bearing replacement – A fairly laborious project to stop an annoying oil leak.
Philips 212 Turntable Gets a New Arduino Controller – An old classic Hi-Fi turntable from the 70s gets a new (better) life courtesy of Arduino
Recapping Can Capacitors in Antique Electronics – A method for restoring old hard-to-get “can” capacitors so they still look original
4×6 Bandsaw Upgrades – Improvements to the el cheapo Chinese 4×6 bandsaw, including new stand and new motor.
Minimus 7 Speaker Terminal Post and Crossover Upgrade – New crossover and upgrade from loose spring clips to binding posts for a classic budget mini-speaker.
lensprojects 
Hi,
I’m tryimg to post on the Bose L1 forum but the posts are now getting through??
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This is not a forum. It is just my blog. If you are talking about some other L1 forum, I don’t know about it.
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Do you still repair L1 systems? I have an auxiliary power board bad on mine.
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Hi Tim. Yes. I will email you at the “user info” address you have listed.
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Hello, I need help repairing the L1 system with the green light turning to amber in seconds. Could you please help with it? Thank you so much.
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Hi Sam – I can try fixing units, but they have to be brought to me the SF Bay area. They are too expensive, and too likely to get damaged, if shipped.
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I just got a Bose L1 model 1 that’s basically brand new…however appears to have common problem. No power. Great article! Beyond my capabilities. Any chance you want to take on another! I live in Washington so could easily ship unit.
Thanks
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Bose L1 Model 1S i conect in 220v burning my power supply i look for dia diagramă all capacitor burning and transistor like hi voltage
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You have likely done some major damage to the input power filter, aux supply, and power amp power supplies. The schematics are linked in my blog post. It may be repairable, but you’ll have to replace a LOT of parts. Good luck.
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