EEVblog | EEVblog 1602 - Sony Amplifier REPAIR ADVENTURE @EEVblog | Uploaded 7 months ago | Updated 2 hours ago
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: youtube.com/watch?v=gZIRPJt69sM
Mud run video: youtube.com/watch?v=yAahT8_P-_E
Tektronix autopsy: youtube.com/watch?v=VZCokbsTwmQ
Forum: 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...
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#ElectronicsCreators #Repair #Sony
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: youtube.com/watch?v=gZIRPJt69sM
Mud run video: youtube.com/watch?v=yAahT8_P-_E
Tektronix autopsy: youtube.com/watch?v=VZCokbsTwmQ
Forum: 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: youtube.com/eevdiscover
T-Shirts: http://teespring.com/stores/eevblog
#ElectronicsCreators #Repair #Sony
