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Old 05-17-2022, 06:43 PM   #1
JoeR74
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Yamaha
 
Join Date: Apr 2022
Posts: 2
Default Yamaha 48 Volt Battery Charger, model JW9-82107-03 Blows Internal 20A Fuse

I am trying to locate a wiring schematic for a Yamaha 48 Volt Golf Cart Battery Charger, model JW9-82107-03. I have 2 of these chargers that have blown the main 20amp fuse. Initial inspection indicates no obvious failed components. I have tested the surge protecting varistors and they check good. Replacement fuse blows as soon as unit is plugged in. I would appreciate any information on where I may find the schematic for this charger, or repair advice from anyone who has repaired this charger with the same issue. Thanks in advance!
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Old 05-17-2022, 07:52 PM   #2
Volt_Ampere
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Yamaha
 
Join Date: May 2012
Location: Rio Verde, Az
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Default Re: Yamaha 48 Volt Battery Charger, model JW9-82107-03 Blows Internal 20A Fuse

Not sure what particular unit that is but the ones I have seen fail had failed capacitors. I could see bulging and signs of leakage. I did not bother to repair them.
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Old 05-29-2022, 11:38 PM   #3
JoeR74
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Default Re: Yamaha 48 Volt Battery Charger, model JW9-82107-03 Blows Internal 20A Fuse

Thanks! All electrolytic capacitors were checked and all tested good.
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