SDG

PCBWay 3D Printing and Fabrication: https://www.pcbway.com/rapid-prototyp...

Repair of the NAD D-3020 Hybrid Digital Amplifier which does not power on. The power LED illuminates orange in standby. When powering the unit up, the front flashes 5 times followed by a red standby light, then back to orange.

Repair of the power supply and the Class D Hypex UcD102 amplifier board with blown output transistors.

Support the Channel with Patreon:   / sdgelectronics  
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0:00 Introduction
3:48 Amplifier Architecture
8:14 Initial Troubleshooting
12:53 SMPSU Power Supply Troubleshooting
33:08 Class D Amplifier Board Repair
46:51 Reassembly and Testing
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Zigbee Stuff
mmWave Sensor: https://s.click.aliexpress.com/e/_Dl7...
Sonoff USB Dongle: https://s.click.aliexpress.com/e/_Dmi...
Zigbee Hub: https://s.click.aliexpress.com/e/_DBp...
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SolderKing UK Made Solder: https://solderking.com/
SolderKing UK Made solder available at Kaisertech:
UK JBC Distributor https://kaisertech.co.uk/ Discount Code: "SDG5"
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3D Printers:
Ender 3 S1 Pro on AliExpress: https://bit.ly/3Tfiz22
Geeetech Mizar S on AliExpress: https://bit.ly/3MN0c0M
Artillery Genius at Banggood: https://bit.ly/32iG2dv
Geeetech Mizar S on AliExpress: https://bit.ly/3MN0c0M
Geeetech A20M at Banggood: https://bit.ly/2YooVll
Geeetech A20M at AliExpress: https://bit.ly/3oBqo2I
Geeetech PLA+ Filament: https://amzn.to/3gelSX1
Ender 3 V2 at Banggood: https://bit.ly/36lN8Ny
Ender 3 V2 at AliExpress: https://bit.ly/3j1C2CO
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Soldering Tools and Equipment:
Aixun T420D On AliExpress: https://bit.ly/3cQXXhh
Aixun T3B on Aliexpress: https://bit.ly/3CHerj1
Aixun T3B on Aliexpress: https://bit.ly/3cDkWIY
Aixun T3A on Aliexpress: https://bit.ly/30LDcgG
AiXun T3A on Aliexpress: https://bit.ly/2VdRVhU
Aixun T380 on AliExpress: https://s.click.aliexpress.com/e/_DmM...
Yihua 853A Preheater: https://www.banggood.com/custlink/DGD...
Youyue 946C Hotplate at Banggood: https://bit.ly/2MuLwqM
Youyue 946C on AliExpress: https://bit.ly/374v3Tp
Solder Paste: https://bit.ly/2E1P5jR
Solder Flux: https://bit.ly/2MQn7we
Quick 857DW+ Hot Air Station: https://bit.ly/2OWDvf4
T12 Soldering Station: https://www.banggood.com/custlink/3KK...
AC Version: https://www.banggood.com/custlink/3GK...
T12 Iron Tips: https://www.banggood.com/custlink/3DG...
Daniu Tip Cleaner: https://bit.ly/31VHwWM
KSGER T12-BCM3 Tip: https://bit.ly/2xgYXCQ
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Microscope Equipment:
Eakins Barlow Lenses: https://bit.ly/3aBY5tR
Eakins Black Microscope: https://bit.ly/2VEcYaW
Eakins Camera Microscope: https://bit.ly/2x86hnT
Camera Adaptor for Microscopes: https://bit.ly/2KBZQMQ
Amscope Microscope Head (US): https://amzn.to/2YmZWNx
Amscope Trinocular Microscope (US): https://amzn.to/2YdBE8k
Amscope Trinocular Microscope (UK): https://amzn.to/2V8w9Gh
Swift SS41-WF20 Binocular Microscope US: https://amzn.to/2VLWEpb
Swift SS41-WF20 Binocular Microscope UK: https://amzn.to/2GYGYFV
Visit my website: https://www.sdgelectronics.co.uk/
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