Yesterday I repaired a charger for an eScooter. One of the strange things I found is that the Rectifier Diodes tested OK in diode mode when in fact they were open circuit. This caused quite a lost of interest and a bit of misunderstanding what was going on, in the comments, so here is why a bad rectifier diode could read good

Referenced in this video several times - and essential viewing if you are learning PSU repair:

Escooter/Ebike charger repair
https://www.youtube.com/watch?v=1Dz8TZzdg04

What is a Crowbar Circuit
https://www.youtube.com/watch?v=UF9TWAY-mf0

I work in collaboration with:
The Electronics Channel (with Carlos and Detlef)
https://www.youtube.com/@Theelectronicschannel

Gran Canaria Uncovered
https://www.youtube.com/@GranCanariaUncovered (with Detlef and Julie. Not electronics related)

Det Builds Stuff - https://www.youtube.com/@detbuildsstuff8128 (Detlef)
Retro Upgrade - https://www.youtube.com/@RetroUpgrade (Carlos)

For All Your PCB needs: free $5 discount coupon
https://www.pcbway.com/setinvite.aspx?inviteid=561767

Equipment used in my videos. These are affiliate links, you pay the normal price and I make a small commission.

TEST METERS
Aneng AN8009
https://s.click.aliexpress.com/e/_DdWIynN
https://amzn.to/469ZgOS
https://www.banggood.com/custlink/mD3HS7d3eA
KM601
https://s.click.aliexpress.com/e/_DBwTp1H
https://www.banggood.com/custlink/KD3FIwEK67
VC480C+
https://s.click.aliexpress.com/e/_DEYs6ix
https://amzn.to/3Q3LEz7
https://amzn.to/46tmNdo
MESR-100 ESR METER
https://amzn.to/3tiy8hK
https://amzn.to/3RwvejK
https://s.click.aliexpress.com/e/_DmirIEj
XC6013L CAPACITOR METER
https://s.click.aliexpress.com/e/_DmXD5zN
https://amzn.to/3t71Nul
https://amzn.to/3LDdcbO
TM-902C TEMPERATURE METER
https://s.click.aliexpress.com/e/_Dm9GAtZ
https://amzn.to/3LFzERv
https://amzn.to/3PTwuvW
FNB58 USB ANALYZER
https://s.click.aliexpress.com/e/_Dmd8TR1
https://amzn.to/3tb1QW8
https://amzn.to/46oMn30
https://www.banggood.com/custlink/mKm5ZwYvbh
PCI POST ANALYZER
https://s.click.aliexpress.com/e/_DBssfzN
https://amzn.to/46m9Gep
TL460S Plus PCI_E ANALYZER
https://s.click.aliexpress.com/e/_DnBVP1z
https://amzn.to/3ZERvOs
MULTIMETER PROBE KIT KET05
https://s.click.aliexpress.com/e/_DE7nAyB
OSCILLOSCOPES
FNIRSI 1014D
https://s.click.aliexpress.com/e/_DEzZMVh
https://amzn.to/3RxMFk1
https://www.banggood.com/custlink/KKGVIfyvQP
FNIRSI DSO-TC3
https://s.click.aliexpress.com/e/_DC8Djz5
https://amzn.to/3RBsgdS
https://www.banggood.com/custlink/Gm3FZThmNi
FNIRSI DPOX180H
https://s.click.aliexpress.com/e/_DBX7auf
https://amzn.to/468oooT
https://www.banggood.com/custlink/GGGtS1Yvso
BENCH PSU
NPS3010W
https://s.click.aliexpress.com/e/_DDPJtbD
https://amzn.to/3rxsuIf
https://www.banggood.com/custlink/3DDV8whE3j
SOLDERING
T12 Station with M8 9501 Handle
https://s.click.aliexpress.com/e/_DFVdrD9
https://amzn.to/3FdG8Ul
SUGON T26D
https://s.click.aliexpress.com/e/_DFxpWw3
QUICK 861DW
https://s.click.aliexpress.com/e/_DDo9wKj
https://amzn.to/3PBOKZH
https://amzn.to/3RCSqNh
PROS'KIT SS-331H
https://s.click.aliexpress.com/e/_DDo9wKj
THERMAL CAMERA
Infiray P2 Pro
https://s.click.aliexpress.com/e/_Dmuj4a7
https://amzn.to/457PgEb
https://www.banggood.com/custlink/DDGPI7hRvU
MICROSCOPES
Amscope Optical Microscope (copy)
https://s.click.aliexpress.com/e/_DlhF4BV
https://uk.banggood.com/custlink/mKGy7e0yww
https://amzn.to/4675Qp0
https://amzn.to/459uvrY
ANDONSTAR AD407
https://s.click.aliexpress.com/e/_Dl4xXrD
https://amzn.to/3PSQKxJ
https://amzn.to/48sxej4

EEPROM Programming
TL866 II+
https://s.click.aliexpress.com/e/_DlsAR1H
https://amzn.to/3RTCRB9
https://amzn.to/3LDu3Lu
CH341A
https://s.click.aliexpress.com/e/_Dk0W2Qb
https://amzn.to/48IZiir

If you would like to support this channel
You can send donations
https://www.paypal.com/paypalme/youtubeLER
You can subscribe to Patreon
https://www.patreon.com/learnelectronicsrepair
You can click Join to become a channel member

Thank you
Richard