Go Back   Badcaps Forums > Troubleshooting Hardware & Devices and Electronics Theory > Troubleshooting Appliances and other Household Electronic Stuff
Register FAQ Calendar Search Today's Posts Mark Forums Read

Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 04-06-2020, 09:11 AM   #1
Badcaps Veteran
Join Date: Jul 2019
City & State: Singapore
My Country: Singapore
Line Voltage: 230VAC 60Hz
I'm a: Knowledge Seeker
Posts: 246
Default EuropAce EWC 913 Wine Cooler power board fuse blow /shorted

I am a occasional hobbyist home electronic / electrical goods repairer without formal training in electronics/electricity. I learned from here and Youtube mostly.
I was given a EuropAce wine cooler model EWC 913, with no power supply - totally dead.
I opened up everything, and zoom into the power supply board (see attached pics), the board part# is Hanny10-12b, PCB110729M1, Rev0.
There are 2 fuses, 1 is OK, 1 was burnt. I disconnected all the input and output cables, put the power board stand-alone on a table, and replaced the burnt fuse. I burnt immediately upon power-on.
After reading some discussions in this forum, I followed 1 of the suggestions:
- I wired 2x40w incandescent bulbs in series with the live wire going to the board, temporary soldered a thin wire across the blown fuse.
- When power on, both the incandescent bulbs lights up and stayed lighted up until I power off. Based on what I read, this is a clear indication of a short-circuit somewhere.
I do not know how to read / trace circuit board, so I practically did a process of eliminations by removing all the capacitors and diodes to test using a DMM, and when the tests appeared good, I soldered them back. I repeated this process with all the transistors. As for resistors I only tested then in circuit. I even removed the 2 big blue and black rectangle parts (presumably relays). But doing all this has no effects at all on the 2 bulbs - they always lighted when I power on. The last I tried was removing the transformer - then the 2 bulbs di not light up!
While doing all these removing/restoring, I only occasionally checked the incoming voltage at the 2 input terminal - it's quite consistently at around 5V. I did not take any reading beyond this.

Please kindly help with my journey to debug and find the short circuit.
Thank you very much.
Attached Images
File Type: jpg IMG_20200406_215959.jpg (360.2 KB, 78 views)
File Type: jpg IMG_20200406_220025.jpg (349.4 KB, 60 views)
File Type: jpg IMG_20200406_220031.jpg (311.4 KB, 53 views)
File Type: jpg FA5501.jpg (296.2 KB, 50 views)
File Type: jpg IMG_20200406_220113.jpg (489.9 KB, 48 views)

Last edited by beetle1303; 04-06-2020 at 09:21 AM..
beetle1303 is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump Technical Forums 2003 - 2023
Powered by vBulletin ®
Copyright ©2000 - 2023, Jelsoft Enterprises Ltd.
All times are GMT -6. The time now is 06:32 PM.
Did you find this forum helpful?