EEVblog 1602 - Sony Amplifier REPAIR ADVENTURE
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The EEVblog® NO SCRIPT, NO FEAR, ALL OPINION An off-the-cuff Video Blog about Electronics Engineering, for engineers, hobbyists, enthusiasts, hackers and Makers Hosted by Dave Jones from Sydney Australia DONATIONS: Store: https://eevblog.store/ PayPal: [email protected] Patreon: https://www.patreon.com/eevblog EEVblog2: http://www.youtube.com/EEVblog2 EEVdiscover: https://www.youtube.com/channel/UCkGvUEt8iQLmq3aJIMjT2qQ EMAIL: Advertising/Commercial: [email protected] Fan mail: [email protected] Hate Mail: [email protected] I DO NOT PAID VIDEO SPONSORSHIPS, DON'T ASK! PLEASE: Do NOT ask for personal advice on something, post it in the EEVblog® forum. I read ALL email, but please don't be offended if I don't have time to reply, I get a LOT of email.
Video Description
Repair of a Sony HCD-SBT20B Bluetooth Stereo. What it's like to nail the repair and then, well come-a-gutsa and have to go down the rabbit hole to fix the fix all whilst battling bad design info. How VFD displays work: https://www.youtube.com/watch?v=gZIRPJt69sM Mud run video: https://www.youtube.com/watch?v=yAahT8_P-_E Tektronix autopsy: https://www.youtube.com/watch?v=VZCokbsTwmQ Forum: https://www.eevblog.com/forum/blog/eevblog-1603-sony-amplifier-repair/ 00:00 - Sony HCD-SBT20B Bluetooth Stereo with a water ingress problem 01:17 - Water isn't that bad actually, even mud. 02:49 - Comically long screwdriver time 04:09 - Vacuum Fluorescent display for all you VFD fanboys 05:10 - Annoying construction 06:14 - Logic level problem? Doesn't seem to be the PSU. 07:57 - Yuck! 09:58 - PCB Cleaning time 12:11 - Did the cleaning work? 13:28 - Hang on, I think I see something... 14:36 - More corrosion 15:21 - Back to measuring voltages on the VFD 17:15 - Handy use of Auto Hold 18:00 - VFD dispaly under the microscope 19:33 - Cathode measurement 20:13 - Anode connection tracing 22:10 - I wouldn't have designed it like this 23:08 - Sanity check 24:32 - What's in the can? 28:16 - Schematic time. Sony service manuals are something else 33:22 - Don't come-a-gutsa on dual diode pinouts 35:16 - Let's power it up on the bench 37:19 - There's something very strange about this... 40:04 - Oh FFS! 42:03 - Now it'll work... If you find my videos useful you may consider supporting the EEVblog on Patreon: http://www.patreon.com/eevblog Or with crypto: BTC: 33BsprBQNBtHuVzVwDmqWkpDjYnCouwASM ETH: 0x68114e40ff4dcdd384750500501e20acf3875f8c BCH: 35n9KBPw9T7M3NGzpS3t4nUYEf9HbRmkm4 USDC: 0x68114e40ff4dcdd384750500501e20acf3875f8c LTC: MJfK57ujxy55su4XicVGQc9wcEJf6mAoXF Web Site: http://www.eevblog.com Store: https://eevblog.store/ Other channels: EEVblog2: http://www.youtube.com/EEVblog2 EEVdiscover: https://www.youtube.com/eevdiscover T-Shirts: http://teespring.com/stores/eevblog #ElectronicsCreators #Repair #Sony
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